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Journal articles on the topic 'Co-fired ceramics'

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Author: Grafiati
Published: 10 December 2022
Last updated: 29 January 2023

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1

Mercke, William L., Thomas Dziubla, Richard E. Eitel, and Kimberly Anderson. "Biocompatibility Evaluation of Human Umbilical Vein Endothelial Cells Directly onto Low-Temperature Co-fired Ceramic Materials for Microfluidic Applications." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2012, CICMT (September 1, 2012): 000549–56. http://dx.doi.org/10.4071/cicmt-2012-tha11.

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Expansion of Low-Temperature Co-fired Ceramic materials into microfluidic systems technology has many beneficial applications due to their ability to combine complex three dimensional structures with optical, fluidic, electrical functions. Evaluations of the biocompatibility of these Low-Temperature Co-fired Ceramic materials are vital for expanding into biomedical research. The few biocompatibility studies on Low-Temperature Co-fired Ceramics generally show negative cellular response to thick film pastes used in generating the electronic circuitry patterns. In this study, biocompatibility of Human Umbilical Vein Endothelial Cells was examined on Heraeus's Low-Temperature Co-fired Ceramic tape and two of their conductive pastes. The biocompatibility was assessed by monitoring cellular attachment and viability up to three days. This study examines the idea of leachates being detrimental to cells due to a study that suggests the possibility of harmful leachates. Results indicate difficulty in initial attachment of Human Umbilical Vein Endothelial Cells to sintered Low-Temperature Co-fired Ceramic tapes, but no hindrance of cellular attachment and growth onto the two conductive pastes. Outcomes also demonstrate that possible harmful leachates from Low-Temperature Co-fired Ceramic materials don't thwart cellular attachment and growth for up to three days of cell culturing. These results provide a basis for biological devices using Low-Temperature Co-fired Ceramic materials.
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2

Majer, Zdeněk, Kateřina Štegnerová, Pavel Hutař, Martin Pletz, Raul Bermejo, and Luboš Náhlík. "Residual Lifetime Determination of Low Temperature Co-Fired Ceramics." Key Engineering Materials 713 (September 2016): 266–69. http://dx.doi.org/10.4028/www.scientific.net/kem.713.266.

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The effect of subcritical crack growth is nowadays intensively studied mainly in relation to the strength of ceramic materials. The main aim of the contribution is to describe behavior of micro-crack propagating in the Low Temperature Co-fired Ceramics (LTCC) under subcritical crack growth (SCCG) conditions. The micro-crack behavior is significantly influenced by residual stresses developed in the LTCC due to different coefficients of thermal expansion of individual components. Two-dimensional numerical model was developed to simulate micro-crack propagation through the composite. The micro-crack propagation direction was determined using Sih’s criterion based on the strain energy density factor and the micro-crack path was obtained. The residual lifetime of the specific ceramic particulate composite (LTCC) was estimated on the basis of experimental data. The paper contributes to a better understanding of micro-crack propagation in particulate ceramic composites in the field of residual stresses.
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3

Wang, Rui, Ji Zhou, Hongjie Zhao, Bo Li, and Longtu Li. "Oxyfluoride glass-silica ceramic composite for low temperature co-fired ceramics." Journal of the European Ceramic Society 28, no. 15 (November 2008): 2877–81. http://dx.doi.org/10.1016/j.jeurceramsoc.2008.05.010.

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4

Zhang, Wenli, and Richard E. Eitel. "Sintering Behavior, Properties, and Applications of Co-Fired Piezoelectric/Low Temperature Co-Fired Ceramic (PZT-SKN/LTCC) Multilayer Ceramics." International Journal of Applied Ceramic Technology 10, no. 2 (February 6, 2012): 354–64. http://dx.doi.org/10.1111/j.1744-7402.2011.02747.x.

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5

Makarovič, Kostja, Darko Belavič, Barbara Malič, Andreja Benčan, Franci Kovač, and Janez Holc. "Small ozone generator fabricated from low-temperature co-fired ceramics." Microelectronics International 38, no. 1 (January 12, 2021): 1–5. http://dx.doi.org/10.1108/mi-07-2020-0043.

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Purpose The purpose of this study is the design, fabrication and evaluation of a miniature ozone generator using the principle of electric discharge are presented. Design/methodology/approach The device was fabricated using a low-temperature co-fired ceramics (LTCC) technology, by which a multilayered ceramic structure with integrated electrodes, buried channels and cavities in micro and millimeter scales was realized. Findings The developed ozone generator with the dimensions of 63.6 × 41.8 × 1.3 mm produces approximately 1 vol. % of ozone in oxygen flow of 15 ml/min, at an applied voltage of 7 kV. Originality/value A miniature ozone generator, manufactured in LTCC technology, produces high amount of ozone and more than it is described in the available references or in datasheets of commercial devices of similar size.
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6

Zhang, Yong Gang, and Xiao Gang Wu. "Dielectric Properties and Microstructure of BaO-Nd2O3-Bi2O3-TiO2 Microwave Ceramics with Li2O-B2O3-SiO2." Advanced Materials Research 906 (April 2014): 12–17. http://dx.doi.org/10.4028/www.scientific.net/amr.906.12.

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Low temperature co-fired ceramics (LTCC) technology becomes crucial in the development of various modules and substrates in electronic packaging, especially in wireless and microwave applications [. With this technology, passive components (such as capacitors and inductors) can be embedded into substrates, and co-fired with high-conductive metals (such as silver and copper) below 900°C. Therefore, the shringkage and dielectric properties of LTCC are of great importance to the performance of components. So far, ceramic/glass composites have been widely researched for LTCC application due to tailored physical properties and low sintering temperature [2-3].
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7

Murata, Takaki, Satoshi Ohga, and Yasutaka Sugimoto. "Development of a Novel Low Temperature Co-Fired Ceramics System Composed of Two Different Co-Firable Low Temperature Co-Fired Ceramics Materials." Japanese Journal of Applied Physics 45, no. 9B (September 22, 2006): 7401–4. http://dx.doi.org/10.1143/jjap.45.7401.

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8

Mohanram, Aravind, Sang-Ho Lee, Gary L. Messing, and David J. Green. "Constrained Sintering of Low-Temperature Co-Fired Ceramics." Journal of the American Ceramic Society 89, no. 6 (June 2006): 1923–29. http://dx.doi.org/10.1111/j.1551-2916.2006.01079.x.

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9

Chu, Xiang Cheng, Li Dan Ding, Xiang Yu Meng, and Long Tu Li. "Vibration and Temperature Measuring Experiments on Multilayer Piezoelectric Actuator." Advanced Materials Research 177 (December 2010): 306–9. http://dx.doi.org/10.4028/www.scientific.net/amr.177.306.

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In this paper, a kind of Mg, Nb co-doped multilayer piezoelectric ceramic is prepared and a non-contact accurate testing method is introduced. Using Pb(Mg1/3Nb2/3)O3- Pb(Ni1/3Nb2/3)O3- Pb(ZrTi)O3 low temperature co-fired ceramics powder and 90/10 Ag-Pb internal electrodes, the sample is prepared with tape casting processing method and low temperature co-fired technique at 960°C. Based on non-contact method, the piezoelectric constant, butterfly curve, and temperature characters are tested. Experiments show that non-contact method is more accurate for d33 testing. The effect of mechanical load on piezoelectric performance is also investigated. Under external mechanical load, switching polarization (Ps) and remnant polarization (Pr) increase respectively. Mechanical load press is also favorable to dominate the temperature rise of the piezoelectric device.
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10

Malecha, Karol. "Integration of Optoelectronic Components with LTCC (Low Temperature Co-Fired Ceramic) Microfluidic Structure." Metrology and Measurement Systems 18, no. 4 (January 1, 2011): 713–22. http://dx.doi.org/10.2478/v10178-011-0067-3.

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Integration of Optoelectronic Components with LTCC (Low Temperature Co-Fired Ceramic) Microfluidic StructureInvestigations on integration of optoelectronic components with LTCC (low temperature co-fired ceramics) microfluidic module are presented. Design, fabrication and characterization of the ceramic structure for optical absorbance is described as well. The geometry of the microfluidic channels has been designed according to results of the CFD (computational fluid dynamics) analysis. A fabricated LTCC-based microfluidic module consists of an U-shaped microchannel, two optical fibers and integrated light source (light emitting diode) and photodetector (light-to-voltage converter). Properties of the fabricated microfluidic system have been investigated experimentally. Several concentrations of potassium permanganate (KMnO4) in water were used for absorbance/transmittance measurements. The test has shown a linear detection range for various concentrations of heavy metal ions in distilled water. The fabricated microfluidic structure is found to be a very useful system in chemical analysis.
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11

Somer, Jakub, Michal Štekovič, František Urban, Josef Šandera, and Ivan Szendiuch. "Bonding of zero-shrink LTCC with alumina ceramics." Soldering & Surface Mount Technology 27, no. 4 (September 7, 2015): 157–63. http://dx.doi.org/10.1108/ssmt-10-2014-0021.

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Purpose – The purpose of this paper is to focus on a description of reliable bonding technique of zero-shrink low-temperature co-fired ceramic (LTCC) and alumina ceramics. LTCC is widely used for manufacturing electrical systems in 3D configuration. LTCC substrates were so far bonded with alumina ceramics using additional adhesive layers with subsequent firing or curing cycle. With the advent of the zero-shrink LTCC substrates, it is now possible to bond unfired substrates with other fired substrates, for example fired LTCC or alumina substrates. Alumina substrate in combination with LTCC brings advantages of good thermal conductivity for usage in heating elements or packaging. Design/methodology/approach – The test structure contains a thick-film pattern for verification of the compatibility of the bonding process. We have used two methods for bonding the substrates: cold chemical lamination (CCL) and thermo compression method, using a dielectric thick-film paste as the adhesive. Optical microscopy, scanning electron microscopy and electric testing of the screen-printed patterns were used for verification of the bonding quality. Findings – The thermo-compression method gave poor results in comparison with the CCL method. The best quality of lamination was achieved at room temperature combined with low pressure for both types of bonding materials. In addition, a possibility of using this bonding method for sensor fabrication was investigated. The ceramic pressure sensor samples with a cavity were created. Originality/value – The possibility of bonding two different ceramic materials was investigated. A new approach to ceramic bonding showed promising results with possible use in sensors.
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12

Zhou, Di, Jing Li, Li-Xia Pang, Da-Wei Wang, and Ian M. Reaney. "Novel water insoluble (NaxAg2−x)MoO4 (0 ≤ x ≤ 2) microwave dielectric ceramics with spinel structure sintered at 410 degrees." Journal of Materials Chemistry C 5, no. 24 (2017): 6086–91. http://dx.doi.org/10.1039/c7tc01718a.

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A novel series of spinel structured ultra-low temperature co-fired microwave dielectric (Na,Ag)MoO4 ceramics were studied in detail. The (Na1.2Ag0.8)MoO4 ceramic can be well sintered at 410 °C with a permittivity ∼8.1, a quality factor (Qf) ∼44 800 GHz and grain size 1–5 μm.
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13

Zhou, Di, Dan Guo, Wen-Bo Li, Li-Xia Pang, Xi Yao, Da-Wei Wang, and Ian M. Reaney. "Novel temperature stable high-εr microwave dielectrics in the Bi2O3–TiO2–V2O5 system." Journal of Materials Chemistry C 4, no. 23 (2016): 5357–62. http://dx.doi.org/10.1039/c6tc01431c.

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Temperature stable microwave dielectric ceramics were obtained for compositions with 0.45BiVO4–0.55TiO2 sintered at 900 °C with εr ∼ 86, a Qf ∼ 9500 GHz and TCF ∼ −8 ppm per °C. It is promising for both low temperature co-fired ceramic technology and dielectrically loaded micro-strip patch antennas substrates.
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14

M. O. Kushnaw, Farhad. "FABRICATION AND CHARACTERIZATION OF LTCC BASED ON TALK GLASSES." IRAQI JOURNAL FOR MECHANICAL AND MATERIALS ENGINEERING 21, no. 2 (June 30, 2021): 164–69. http://dx.doi.org/10.32852/iqjfmme.v21i2.550.

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In this work, fabrication of low temperature co-fired (LTCC) with different Talc content is performed. Density and mechanical characterization of the prepared samples has been examined. Three series of low temperature co-fired ceramics have been prepared. The glass part of these composites contains talc to enhance the mechanical properties. The densities, hardness and splitting strength are measured for these series to monitor the effect of composition on their properties. It is shown that the third series (Base3; Flint 25%, talc 35%, Pota ash 8%, Soda ash 12%, and Boric Acid 20%) of the higher talc content shoes the better densities and mechanical properties. The results are explained in terms of better balance of the ceramic-class content that enhances the measured properties.
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15

Rabe, Torsten, M. Gemeinert, and Wolfgang A. Schiller. "Development of Advanced Low Temperature Co-Fired Ceramics (LTCC)." Key Engineering Materials 264-268 (May 2004): 1181–84. http://dx.doi.org/10.4028/www.scientific.net/kem.264-268.1181.

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16

Reis, Derek, Jesse Taff, and Donald Plumlee. "Electric Micro-Propulsion in Low Temperature Co-fired Ceramics." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2013, CICMT (September 1, 2013): 000137–42. http://dx.doi.org/10.4071/cicmt-wp16.

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This work focuses on the fabrication and assembly of miniature inductively-coupled plasma (ICP) electrostatic thrusters using DuPont's 951 Low Temperature Co-Fired Ceramics (LTCC). The use of LTCC allows for integration of electrical and fluidic features inside a hermetically sealed device that is resistant to plasma erosion. LTCC also allowed for the creation of cylindrical and planar structures which could be mated to form a single device. The thruster consists of a planar base, an antenna disc, and a plasma containment cylinder. The planar base contains internal fluid distribution channels as well as electrical interconnections. The antenna disc houses straight-through gas ports, electrical interconnects, as well as a planar spiral ICP antenna. The containment cylinder is used to contain argon plasma created by a radio frequency (RF) signal sent through the ICP antenna. The development of the fabrication process will be presented for the incorporation and alignment of all three LTCC components together to create a single thruster body. The results of the electrical and fluidic integration of the device will be evaluated and presented.
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17

Dabrowski, Arkadiusz, Przemyslaw Rydygier, Mateusz Czok, and Leszek Golonka. "High voltage applications of low temperature co-fired ceramics." Microelectronics International 35, no. 3 (July 2, 2018): 146–52. http://dx.doi.org/10.1108/mi-12-2017-0070.

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Purpose The purpose of this study was to design, fabricate and test devices based on transformers integrated with low-temperature co-fired ceramic (LTCC) modules with isolation between primary and secondary windings at the level between 6 and 12 kV. Design/methodology/approach Insulating properties of the LTCC were examined. Dielectric strength and volume resistivity were determined for common LTCC tapes: 951 (DuPont), 41020, 41060 (ESL), A6M (Ferro) and SK47 (KEKO). According to the determined properties, three different devices were designed, fabricated and tested: a compact DC/DC converter, a galvanic separator for serial digital bus and a transformer for high-voltage generator. Findings Breakdown field intensity higher than 40 kV/mm was obtained for the test samples set, whereas the best breakdown field intensity of about 90 kV/mm was obtained for 951 tape. The materials 41020 and 951 exhibited the highest volume resistivity. Fabricated devices exhibited safe operation up to a potential difference of 10 kV, limited by minimum clearance. Long-term stability was assured by over 20 kV strength of inner dielectric. Practical implications This paper contains description of three devices made in the LTCC technology for application in systems with high-voltage isolation requirement, for example, for power or railway power networks. Originality/value The results show that LTCC is a suitable material for fabrication of high-voltage devices with integrated passives. Technology and properties of three examples of such devices are described, demonstrating the ability of the LTCC technology for application in reliable high-voltage devices and systems.
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18

Czok, Mateusz J., Karol Malecha, and Leszek J. Golonka. "Electromagnetic Valve Made in Low-Temperature Co-Fired Ceramics." International Journal of Applied Ceramic Technology 11, no. 3 (November 19, 2013): 468–74. http://dx.doi.org/10.1111/ijac.12198.

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19

Couceiro, Pedro, and Julián Alonso-Chamarro. "Fluorescence Imaging Characterization of the Separation Process in a Monolithic Microfluidic Free-Flow Electrophoresis Device Fabricated Using Low-Temperature Co-Fired Ceramics." Micromachines 13, no. 7 (June 28, 2022): 1023. http://dx.doi.org/10.3390/mi13071023.

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A monolithic microfluidic free-flow electrophoresis device, fabricated using low-temperature co-fired ceramic technology, is presented. The device integrates gold electrodes and a 20 µm thick transparent ceramic optical window, suitable for fluorescence imaging, into a multilevel microfluidic chamber design. The microfluidic chamber consists of a 60 µm deep separation chamber and two, 50 µm deep electrode chambers separated by 10 µm deep side channel arrays. Fluorescence imaging was used for in-chip, spatial-temporal characterization of local pH variations in separation conditions as well as to characterize the separation process. The device allowed baseline resolution separation of a sample mixture of Fluorescein, Rhodamine 6G, and 4-Methylumbelliferone at pH 7.0, in only 6 s, using 378 V.s/cm. The results demonstrate the possibility of studying a chemical process using fluorescence imaging within the traditional fields of low-temperature co-fired ceramics technology, such as high-electrical-field applications, while using a simple fabrication procedure suitable for low-cost mass production.
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20

Zhang, Xiao Qing, Bo Li, Xin Feng Pang, Jing Bo Sun, Jun Wu, Bing Yang Chen, Hai Guo, Ji Zhou, and Long Tu Li. "Electromagnetic Bandgap Structure by Low Temperature Co-Fired Ceramics Technology." Advanced Materials Research 287-290 (July 2011): 377–81. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.377.

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A EBG（Electromagnetic Bandgap） structure was prepared based on the theory of the high impedance surface photonic crystal and the HFSS emulating results. The measurement result showed that the bandgap of the EBG structure was in the Ultra Wideband range. The designed structure was fabricated by a method of low temperature co-fired ceramics technology（LTCC） using ceramics as the matrix and silver as the coils. The micro-structure was analyzed by microscope and scanning electron microscope which showed that these two kinds of materials were well connected. A bandgap between 4GHz~5.5GHz was found by the Vector Network Analyzer which was accord to the emulation.
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21

Somer, Jakub, Martin Klíma, Petr Machac, and Ivan Szendiuch. "Joining Low Temperature Co-Fired Ceramics, Al2O3 and SiC Substrates for Higher Operating Temperature Applications." Solid State Phenomena 258 (December 2016): 631–34. http://dx.doi.org/10.4028/www.scientific.net/ssp.258.631.

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The article deals with forming solid joints of Low Temperature Co-fired Ceramic with Alumina or Silicon Carbide chips. The aim of this study is to find material of standard thick film layer process, which would be useful for electronic chip packages designed for higher operating temperatures (from 150 up to 800 °C). Heraeus Hera Lock 2000 Low Temperature Co-fired Ceramics (LTCC) was chosen, because of its nearly zero shrinkage during firing. Also other LTCC types were used to comparison of results. Conductive and isolating thick film pastes are used for joining. Temperature cycling of samples was applied. Strength of cycled samples was investigated by mechanical shear tests. The structure of microsection of joints was analyzed using optical and scanning electron microscope. The results show that thick film pastes are usable for joining above mentioned materials in specific temperature range.
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22

Mercke, William L., Thomas Dziubla, Richard E. Eitel, and Kimberly Anderson. "Improved Trans-endothelial Electrical Resistance Sensing using Microfluidic Low-Temperature Co-fired Ceramics." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2013, CICMT (September 1, 2013): 000162–67. http://dx.doi.org/10.4071/cicmt-wp31.

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Trans-endothelial Electrical Resistance (TEER) and cellular impedance measurements are widely used to evaluate the barrier properties and functional change of endothelial cell monolayers. In the current work, low temperature cofired ceramics (LTCC) are applied enabling the incorporation of TEER and impediametric measurements in an integrated microfluidic chip. LTCC materials are an ideal substrate for biomedical and cell-based microfluidics due to their biocompatibility and ability to combine complex three dimensional structures with optical, fluidic, and electrical functionality. Multilayer microfluidic ceramic devices incorporating gold measurement electrodes where prepared using standard LTCC manufacturing procedures. The sensitivity of the resulting LTCC devices were compared to systems currently on the market for TEER measurements. These results indicate the LTCC device is able to effectively detect the growth of an endothelial cell monolayer. Results further evaluate endothelial cell viability using electrical resistance and Live/Dead assay. Finally, the results from this study also display improved sensitivity through the optimization of the electrode geometry and use of a lock-in amplifier. These results provide a solid basis for using low temperature co-fired ceramic materials for microfluidic TEER devices.
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23

Dorczynski, Mateusz, Wiktoria Fabinska, Henryk Roguszczak, and Leszek Golonka. "LTCC Breakdown Voltage Investigation." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2016, CICMT (May 1, 2016): 000047–52. http://dx.doi.org/10.4071/2016cicmt-tp2a3.

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Abstract High voltage properties of the LTCC (Low Temperature Co-Fired Ceramics) cofired ceramic tape are presented. Chauvin Arnoux C.A. 6555 insulation tester is used to measure the leakage current and the resistance. Measurement is possible up to 15 kV. The DuPont 951 test structures are manufactured. The electrodes are fabricated of Ag (DP 6142) and PdAg (DP 6146) pastes. The leakage current dependence upon the temperature up to 320°C is measured. The ceramics properties depend on the temperature, especially beyond 200°C. Moreover, the current characteristics as a function of electrical field are presented and the breakdown voltage is determined.
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24

Shiao, Fu Thang, Han Chou Ke, and Ying Chieh Lee. "Phase Transformation Behavior of Bi2O3-ZnO-Nb2O5 Ceramics Sintered at Low Temperature." Materials Science Forum 534-536 (January 2007): 1477–80. http://dx.doi.org/10.4028/www.scientific.net/msf.534-536.1477.

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To co-fire with commercial LTCC (Low Temperature Co-fired Ceramic) materials at 850oC ~ 880 oC, different contents of B2O3 were added to the Bi2O3-ZnO-Nb2O5 (BZN) ceramics. The dielectric properties of BZN ceramics sintered at low temperatures were studied. According to the test results, the cubic phase of BZN was transformed into orthorhombic in all the test materials. A BiNbO4 phase was formed in test materials with 2 ~ 5 wt% of B2O3 addition. The BiNbO4 phase was inhibited by extra ZnO addition. The phase transformation of cubic BZN was controlled during the synthesis process of cubic and orthorhombic ZnO-Nb2O5 phase with excess ZnO content. The Cubic and orthorhombic phases of BZN could coexist and be sintered densely at 850 oC/2hr.
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Cho, Pyeong-Seok, Chong-Yun Kang, Sun-Jung Kim, Jin-Sang Kim, Seok-Jin Yoon, Nguyen Van Hieu, and Jong-Heun Lee. "[ SnO2] Gas Sensors Using LTCC (Low Temperature Co-fired Ceramics)." Korean Journal of Materials Research 18, no. 2 (February 25, 2008): 69–72. http://dx.doi.org/10.3740/mrsk.2008.18.2.069.

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26

Mohanram, Aravind, Gary L. Messing, and David J. Green. "Densification and Sintering Viscosity of Low-Temperature Co-Fired Ceramics." Journal of the American Ceramic Society 88, no. 10 (October 2005): 2681–89. http://dx.doi.org/10.1111/j.1551-2916.2005.00497.x.

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27

Czok, Mateusz J., Paweł I. Bembnowicz, and Leszek J. Golonka. "Low-Temperature Co-Fired Ceramics System for Light Absorbance Measurement." International Journal of Applied Ceramic Technology 10, no. 3 (April 10, 2013): 443–48. http://dx.doi.org/10.1111/ijac.12036.

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28

Jo, Yeon Hwa. "Gadolinium Zinc Borate Glass-Based Low Temperature Co-fired Ceramics." Metals and Materials International 14, no. 4 (August 26, 2008): 493–96. http://dx.doi.org/10.3365/met.mat.2008.08.493.

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29

LIM, Won Bae, Dong Wook SHIN, Bhaskar C. MOHANTY, Young Jin PARK, and Yong Soo CHO. "Chemical durability of anorthite-based low temperature co-fired ceramics." Journal of the Ceramic Society of Japan 117, no. 1370 (2009): 1138–40. http://dx.doi.org/10.2109/jcersj2.117.1138.

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30

Dai, Steve. "Densification and crystallization in crystallizable low temperature co-fired ceramics." Journal of Materials Science 47, no. 11 (February 18, 2012): 4579–84. http://dx.doi.org/10.1007/s10853-012-6318-1.

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31

Dannheim, Henning, Ulrich Schmid, and Andreas Roosen. "Lifetime prediction for mechanically stressed low temperature co-fired ceramics." Journal of the European Ceramic Society 24, no. 8 (July 2004): 2187–92. http://dx.doi.org/10.1016/j.jeurceramsoc.2003.07.010.

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32

Chen, Guohua, and Xinyu Liu. "Fabrication, characterization and sintering of glass-ceramics for low-temperature co-fired ceramic substrates." Journal of Materials Science: Materials in Electronics 15, no. 9 (September 2004): 595–600. http://dx.doi.org/10.1023/b:jmse.0000036038.51510.fb.

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33

Peng, Rui, Yuan Xun Li, Hua Su, Yong Cheng Lu, Xue Ying Wang, Gong Wen Gan, and Gang Wang. "Relationship between the Different Amount of LMZBS Glass and Dielectric Properties of Li2(Mg0.96Ni0.04)SiO4 Ceramics." Materials Science Forum 1027 (April 2021): 10–14. http://dx.doi.org/10.4028/www.scientific.net/msf.1027.10.

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The effect of different amount of LMZBS glass on the sintering behavior, microstructure and microwave dielectric properties of the Li2(Mg0.96Ni0.04)SiO4 ceramics was investigated. The synthesis of materials was based on the solid-state reaction method. The micromorphology of the composite ceramics was confirmed using scanning electron microscopy. The microwave dielectric parameters were measured by the network analyzer. The mechanism of heat transfer coming from LMZBS glass lower the densification temperature of matrix ceramic from 1150°C down to 900°C. Excellent microwave dielectric properties were obtained with 1.2 wt% LMZBS glass sintered at 900°C for 4h (εr=5.77 and Q×f=29,558 GHz at 16 GHz, τf=-14.5 ppm/°C). There was a compatibility between the composite ceramic and Ag. Therefore, the aimed ceramic has great potential value of application in the field of low temperature co-fired ceramics of millimeter-wave devices.
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34

Weilguni, Michael, Walter Smetana, Goran Radosavljevic, Johann Nicolics, Werner Goebl, and Alex Hofmann. "Low Temperature Co-fired Ceramics Processing Parameters Governing the Performance of Miniaturized Force Sensors." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2012, CICMT (September 1, 2012): 000411–16. http://dx.doi.org/10.4071/cicmt-2012-wa412.

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For the development of miniaturized force sensors, built up in ceramics technology with piezo-resistive principle, the compatibility of the piezo-resistive thick-film paste with the substrate and termination paste has to be verified. This paper deals with the compatibility of the ESL 3414-A piezo-resistive paste on HTCC (high temperature co-fired ceramics) substrates (alumina as reference and the partially stabilized zirconia tape ESL 42013-A) as well as on LTCC (low temperature co-fired ceramics) substrates (Heraeus AHT01-005, AHT08-047, CT707; and CeramTec GC) under different manufacturing conditions. The sheet resistance at room temperature, the longitudinal gauge factor at room temperature and the temperature coefficient of resistance have been measured. The results are compared with microscope images showing cracks in distinct cases. Finally, the compatibility and thus applicability of the ESL 3414-A on the investigated substrates is evaluated.
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He, Yan, Xue Min Cui, Le Ping Liu, and Zhong Yuan Liang. "Study on Surface Coating of BaO- B2O3-SiO2 Glass-Ceramic Powders with Al2O3 for Water-Based Tape Casting." Materials Science Forum 663-665 (November 2010): 1065–68. http://dx.doi.org/10.4028/www.scientific.net/msf.663-665.1065.

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This paper studied the low temperature co-fired ceramic (LTCC) powders based on BaOTiO2- B2O3-SiO2 glass-ceramics that is coated with Al2O3 using co-precipitation process. The Al2O3 coating is made from aluminum isopropoxide precursor solutions. Atomic Absorption spectrometer and TEM methods are employed in this experiment. After calcinations, the alumina coating is strongly adhered to the LTCC particles’ surface. The Al2O3 coating is able to prevent soluble Ba2+ from dissolving in water and the effect grows with the increasing mass fraction of aluminum isopropoxide precursor in the co-precipitation system. The optimum mass fraction of alumina isopropoxide coating precursor is about 6wt%.
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36

Peng, Sen, Chen Li, Chao Tang, Sheng Liu, Shengxiang Huang, Leilei Qiu, and Lianwen Deng. "Crystal Structures and Microwave Dielectric Properties of Novel MgCu2Nb2O8 Ceramics Prepared by Two-Step Sintering Technique." Materials 15, no. 22 (November 15, 2022): 8053. http://dx.doi.org/10.3390/ma15228053.

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In this work, novel MgCu2Nb2O8 (MCN) ceramics were synthesized by the two-step sintering (TSS) technique, and the phase composition, crystal structures, and microwave dielectric properties were comprehensively studied. X-ray diffraction (XRD) and Raman analysis demonstrated that MCN ceramics are multi-phase ceramics consisting of MgNb2O6 and CuO phases. X-ray photoelectron spectroscopy (XPS) was utilized to investigate the chemical composition and element valence of MgCu2Nb2O8 ceramics. Scanning electron microscopy (SEM) analysis demonstrated dense microstructures in the MCN ceramics prepared at a sintering temperature of 925 °C. The microwave dielectric properties were largely affected by the lattice vibrational modes and densification level of the ceramics. The outstanding microwave dielectric properties of εr = 17.15, Q × f = 34.355 GHz, and τf = −22.5 ppm/°C were obtained for the MCN ceramics sintered at 925 °C, which are results that hold promise for low temperature co-fired ceramic (LTCC) applications.
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Moeller, Korey, Jason Besecker, Greg Hampikian, A. Moll, D. Plumlee, John Youngsman, and Janet M. Hampikian. "A Prototype Continuous Flow Polymerase Chain Reaction LTCC Device." Materials Science Forum 539-543 (March 2007): 523–28. http://dx.doi.org/10.4028/www.scientific.net/msf.539-543.523.

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There is a growing need for remote biological sensing in both laboratory and harsh field environments. Sensing and detection of biological entities such as anthrax, Ebola and other micro-organisms of interest involves sampling of the environment, amplification, analysis and identification of the target DNA. A key component of such a sensor is a low cost, portable, reusable, continuous flow polymerase chain reaction (PCR) thermal cycler. Fabrication with low temperature co-fired ceramics (LTCC) can provide a reusable low cost device capable of operating in a wide range of environments The design and manufacture of a prototype continuous flow micro-fluidic PCR device using low temperature co-fired ceramic is presented. Initial modeling of flow characteristics and heat transfer was carried out in SolidWorks™. The prototype device employs resistance heaters below the channels, buried and surface thermocouples for temperature monitoring, and air gaps for thermal isolation.
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Wang, Zhijian, Feng Pan, Lanlan Liu, Qifeng Du, Ruitao Tang, Jun Ai, Hong Zhang, and Ying Chen. "Enhanced Microwave Dielectric Properties and Sintering Behaviors of Mg2SiO4-Li2TiO3-LiF Ceramics by Adding CaTiO3 for LTCC and GPS Antenna Applications." Crystals 12, no. 4 (April 7, 2022): 512. http://dx.doi.org/10.3390/cryst12040512.

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Mg2SiO4 holds promise for its application in the microwave communication field due to its low dielectric constant and high Q×f value. However, its high negative τf and high sintering temperature limit its application in low-temperature co-fired ceramic (LTCC) devices. In this work, Li2TiO3 and CaTiO3 were introduced to improve the τf, and LiF was chosen to decrease the sintering temperature. According to XRD patterns and SEM micrographs, the ceramic systems displayed a complex-phase structure, and the microstructure was densified when CaTiO3 was added. All of the relative densities, dielectric constants, and Q×f values first increased and then decreased as the sintering temperature increased. The MLLC11.5 ceramics sintered at 800 °C could be obtained with the highest Q×f value of 54,581 GHz (at 8.06 GHz), εr of 14.13, and τf of + 5.81 ppm/°C. Furthermore, it was proven that the MLLC11.5 powders could be co-fired without any reaction with Ag powders at 800 °C, indicating its potential for LTCC application. The MLLC11.5 composition was used to prepare a GPS antenna and showed good prospects for its application in electronic communications.
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Zeng, Qun, and Yong Heng Zhou. "Studies on Structural, Microwave Dielectric Properties, and Low-Temperature Sintering of 1.52Li2O-0.36Nb2O5-1.34TiO2 Ceramic." Key Engineering Materials 512-515 (June 2012): 1226–30. http://dx.doi.org/10.4028/www.scientific.net/kem.512-515.1226.

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The structure, microwave dielectric properties and low-temperature sintering of a new Li2O-Nb2O5-TiO2 system ceramic with the Li2O: Nb2O5: TiO2 mole ratio of 1.52: 0.36: 1.34 have been investigated in this study. The 1.52Li2O-0.36Nb2O5-1.34TiO2 (LNT) ceramic is composed of two phases, the “M-Phase” and Li2TiO3 solid solution (Li2TiO3ss) phase. This new microwave dielectric ceramic has low intrinsic sintering temperature ( ~ 1100 oC ) and good microwave dielectric properties of middle permittivity (εr ~38.6), high Q×f value up to 7712 GHz, and near zero τf value (~ 4.64 ppm/oC). In addition, the sintering temperature of the LNT ceramics could be lowered down effectively from 1100 oC to 900 oC by adding 1 wt.% B2O3. Good microwave dielectric properties of εr = 42.5, Q*f =6819 GHz and τf = 2.7 ppm/oC could be obtained at 900 oC, which indicate the ceramics would be promising candidates for low-temperature co-fired ceramics (LTCC) applications.
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Malecha, Karol, Marek Dawgul, and Dorota G. Pijanowska. "Ion-selective electrode made with LTCC (low temperature co-fired ceramics) technology." Microelectronics International 31, no. 3 (August 4, 2014): 201–6. http://dx.doi.org/10.1108/mi-11-2013-0072.

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Purpose – The purpose of this paper is to focus on development and electrical characterization of miniature ion-selective electrode (ISE) for application in micro total analysis system or lab-on-chip devices. The presented ISE is made using low temperature co-fired ceramics (LTCC). It shows possibility of integration chemically sensitive layers with structures fabricated using modern microelectronic technology. Design/methodology/approach – The presented ISEs were fabricated using LTCC microelectronic technology. The possibility of ISE fabrication on multilayer ceramic substrate made of two different LTCC material systems (CeramTec GC, Du Pont 951) with deposited thick-film silver pad is studied. Different configurations of LTCC/silver pad (surface, embedded) are taken into account. Electrical performance of all LTCC-based structures with integrated ISE was examined experimentally. Findings – The preliminary measurements made for ammonium ions have shown good repeatability and linear response with slope of about 30-35 mV/dec. Moreover, no significant impact of the LTCC material system and silver pad configuration on fabricated ISEs’ electrical properties was noticed. Research limitations/implications – The presented research is a preliminary work. The authors focused on ISE fabrication on LTCC substrates without any microfluidic structures. Therefore, further research work will be needed to evolve ion-selective membrane deposition inside microfluidic structures made in LTCC substrates. Practical implications – Development of the LTCC-based ISE makes the fabrication of detection units for integrated microfluidic systems possible. These devices can find practical applications in analytical diagnosis and continuous monitoring of various biochemical parameters. Originality/value – This paper shows design, fabrication and performance of the novel ISE fabrication using LTCC technology.
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Shao, Hui, and Gang Jian. "Microwave Dielectric Properties and its Compatibility with Silver of Glass-Ceramic Based on Co-Fire at Low Temperature." Advanced Materials Research 704 (June 2013): 167–72. http://dx.doi.org/10.4028/www.scientific.net/amr.704.167.

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Low temperature co-fired glass-ceramic-Ag metal electrode systems were investigated in relation to Ag diffusion and micro structural development during firing. Sintering temperature was in a range of 800°C-900°C. At lower temperature of 800°C, Ag ion was diffused through in the LTCC substrates. However, Ag diffusion was not observed at 850°C below. Simultaneously, the densification of the electrode was greatly improved. With increasing sintering temperature, glass-ceramic to the electrode does not occur due to increase of the densification of the sample. The glass-ceramics exhibited good dielectric properties: εr=7.74, tanδ=0.7×10-3 at 850°C for 0.5h.
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42

Shi, Liang, Cheng Liu, and Huaiwu Zhang. "Effects of W6+ substitution on the microwave dielectric properties of Ce2Zr3(MoO4)9 ceramics." Journal of Advanced Dielectrics 09, no. 06 (December 2019): 1950049. http://dx.doi.org/10.1142/s2010135x19500498.

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Low temperature sintered Ce2Zr3([Formula: see text][Formula: see text][Formula: see text] (marked as CZMW) ceramics were synthesized via the conventional solid-state reaction method. X-ray diffraction results showed that the CZMW ceramics belonged to a Trigonal system with R-3C space group, and without any impure phase formation. The experimental facts revealed that the density and grain morphology greatly affected the microwave dielectric properties. The samples sintered at 825∘C exhibited good microwave dielectric properties: [Formula: see text], [Formula: see text][Formula: see text]GHz (at 11.3[Formula: see text]GHz) and a satisfactory [Formula: see text] ([Formula: see text]1.5[Formula: see text]ppm/∘C) value. It is suggested that the CZMW ceramics are suitable for low-temperature co-fired ceramic (LTCC) applications in microwave devices.
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43

Jurków, Dominik, Arkadiusz Dąbrowski, Tomasz Zawada, and Leszek Golonka. "PRELIMINARY MODEL AND TECHNOLOGY OF PIEZOELECTRIC LOW TEMPERATURE CO-FIRED CERAMIC (LTCC) UNIAXIAL ACCELEROMETER." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2012, CICMT (September 1, 2012): 000584–91. http://dx.doi.org/10.4071/cicmt-2012-tha21.

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Design procedure, technology and basic properties of a piezoelectric Low Temperature Co-fired Ceramics (LTCC) accelerometer are presented in this paper. The sensor consists of a LTCC membrane with a seismic mass. Meggitt InSensor® PZT thick film has been applied as the sensing material. Finite element method (FEM) has been used to analyze the impact of the sensor geometry (membrane thickness, membrane and seismic mass radii) and PZT thick film placement on basic properties (sensitivity and bandwidth) of the device. The LTCC process was optimized in order to create thin and planar ceramic membrane with relatively huge seismic mass. Selected properties of the sensor have been measured and compared with the simulated ones.
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44

Wu, Nai Xian, and Jian Jiang Bian. "Glass-Free Low-Temperature Co-Fired Ceramics Microwave Ceramic AW1−xTexO4 (A=Ca, Sr, Zn)." International Journal of Applied Ceramic Technology 8, no. 6 (March 28, 2011): 1494–500. http://dx.doi.org/10.1111/j.1744-7402.2011.02611.x.

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45

Sugimoto, Yasutaka, Tsuyoshi Katsube, Machiko Motoya, Yuki Takemori, Yoichi Moriya, Kazuo Kishida, Takahiro Takada, and Nobuhiko Tanaka. "Novel Glass-free LTCC Material co-fired with Cupper-Electrodes." Additional Conferences (Device Packaging, HiTEC, HiTEN, and CICMT) 2016, CICMT (May 1, 2016): 000130–35. http://dx.doi.org/10.4071/2016cicmt-wp11.

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Abstract Low Temperature Co-fired Ceramics (LTCC) have excellent high-frequency characteristics and have widely been used for microwave electronic components. By lowering the sintering temperature of the ceramics used as insulating layers, LTCC was co-fired with a high-conductivity wiring conductor, such as Cu or Ag. LTCC substrate has been expected as one of the most promising technologies to realize miniaturization of RF circuits in the field of wireless communications. There is no limitation to demand for further downsizing of RF circuits, suppression of electric loss and high mechanical strength of the substrate. However, conventional LTCC materials for substrates contain glass frit which causes defects, such as pores or cracks, and low mechanical strength. In this work, we have developed a novel LTCC material system BaO-Al2O3-SiO2-MnO-TiO2, without any glass frits. The material was co-fired with cupper electrodes, which have low resistivity and show less diffusion than silver in LTCC, under a low-oxygen partial pressure atmosphere (mixture of N2 and H2) at 980°C. Thin layers (8μm) of the material showed high insulating resistivity and reliability due to few defects, such as pores, in LTCC. Its dielectric and mechanical properties were measured as 6.8 (low-εr), 350 at 3GHz (high-Q-value) and 341MPa (high mechanical strength) respectively. This LTCC material will contribute to further miniaturizing of microwave applications and integration of passive elements.
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Peng Long, 彭龙, 王浩 Wang Hao, 易祖军 Yi Zujun, 黄凯雯 Huang Kaiwen, 温保健 Wen Baojian, and 戴茂 Dai Mao. "Design and analysis of low temperature co-fired ceramics ferrite circulator." High Power Laser and Particle Beams 26, no. 11 (2014): 113009. http://dx.doi.org/10.3788/hplpb20142611.113009.

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47

Ding, Youyi, Shixiang Liu, Xingyun Li, Rui Wang, and Ji Zhou. "Luminescent low temperature co-fired ceramics for high power LED package." Journal of Alloys and Compounds 521 (April 2012): 35–38. http://dx.doi.org/10.1016/j.jallcom.2011.12.143.

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48

Kolek, A., P. Ptak, and A. Dziedzic. "Noise characteristics of resistors buried in low-temperature co-fired ceramics." Journal of Physics D: Applied Physics 36, no. 8 (April 3, 2003): 1009–17. http://dx.doi.org/10.1088/0022-3727/36/8/311.

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49

Yung, Winco K. C., and Jijun Zhu. "Studies on laser ablation of low temperature co‐fired ceramics (LTCC)." Microelectronics International 24, no. 3 (July 31, 2007): 27–33. http://dx.doi.org/10.1108/13565360710779163.

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50

Zhu, Jijun, and Winco K. C. Yung. "Studies on laser ablation of low temperature co-fired ceramics (LTCC)." International Journal of Advanced Manufacturing Technology 42, no. 7-8 (December 19, 2008): 696–702. http://dx.doi.org/10.1007/s00170-008-1647-6.

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