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Journal articles on the topic 'Transparent polycrystalline ceramics'

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1

Weinan Gao, Weinan Gao, Yu Shen Yu Shen, Yong Bo Yong Bo, Wenping Zhang Wenping Zhang, Yong Bi Yong Bi, and and Zuyan Xu and Zuyan Xu. "Optical and ESR study of Nd:YAG transparent polycrystalline ceramics." Chinese Optics Letters 15, no. 5 (2017): 051601–51603. http://dx.doi.org/10.3788/col201715.051601.

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2

Ayman, Muhammad Tsabit, Hyeon Mo Bae, Heejin Kwon, Jaehyung Lee, and Dang-Hyok Yoon. "Transparent Polycrystalline γ-AlON Ceramics." Ceramist 23, no. 3 (September 30, 2020): 244–60. http://dx.doi.org/10.31613/ceramist.2020.23.3.01.

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3

Johnson, Roy, P. Biswas, P. Ramavath, R. S. Kumar, and G. Padmanabham. "Transparent Polycrystalline Ceramics: An Overview." Transactions of the Indian Ceramic Society 71, no. 2 (June 2012): 73–85. http://dx.doi.org/10.1080/0371750x.2012.716230.

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4

Yang, Hao, Jian Zhang, Dewei Luo, Hui Lin, Deyuan Shen, and Dingyuan Tang. "Novel transparent ceramics for solid-state lasers." High Power Laser Science and Engineering 1, no. 3-4 (December 20, 2013): 138–47. http://dx.doi.org/10.1017/hpl.2013.18.

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AbstractRecent progress on rare-earth doped polycrystalline YAG transparent ceramics has made them an alternative novel solid-state laser gain material. In this paper we present results of our research on polycrystalline RE:YAG transparent ceramics. High optical quality YAG ceramics doped with various rare-earth (RE) ions such as ${\rm Nd}^{3+}$, ${\rm Yb}^{3+}$, ${\rm Er}^{3+}$, ${\rm Tm}^{3+}$, and ${\rm Ho}^{3+}$ have been successfully fabricated using the solid-state reactive sintering method. Highly efficient laser oscillations of the fabricated ceramics are demonstrated.
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5

Li, Qing, Guo Ping Zhang, Yang Liu, Hao Wang, and Li Wen Lei. "Effect of Microstructure on Transmission Properties of Polycrystalline Transparent Ceramics." Materials Science Forum 704-705 (December 2011): 842–46. http://dx.doi.org/10.4028/www.scientific.net/msf.704-705.842.

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The transmission properties of polycrystalline transparent ceramics are influenced by the chemical composition and the microstructure of the material. The fundamental optical mechanism of transparent ceramics and the influencing factors on transmission properties were discussed in this paper. The Mie theory for light scattering is applied to calculate scattering coefficients of residual pores and optical birefringence. The in-line transmission curves of the transparent alumina were calculated as a function of pore size, porosity and grain size. The results show that scattering by the residual pores is the dominant influencing factors on transmission properties. The scattering by the residual pores increases with an increase in porosity and the maximum of the scattering was observed when the pore size close to the optical wavelength. Optical birefringence in the transparent ceramics with non-cubic crystal structure has an important effect on the in-line transmission. The in-line transmission increases with a decrease in grain size. Keywords: transparent ceramics; microstructure; light scattering; birefringence
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6

Joshi, Bhupendra, Hyun Hwi Lee, Seung Ho Kim, Zheng Yi Fu, Koichi Niihara, and Soo Wohn Lee. "Boron Nitride Doped Transparent Polycrystalline Silicon Nitride Ceramics." Materials Science Forum 658 (July 2010): 428–31. http://dx.doi.org/10.4028/www.scientific.net/msf.658.428.

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The addition of h- BN to a polycrystalline Si3N4 was to increase the fracture toughness and other mechanical properties such as flexural strength and hardness of the material. The hot pressed samples were prepared from the mixture of α-Si3N4, AlN, MgO and h-BN. The composite contained from 0 to 2 wt.% BN powder with sintering aids (9% AlN + 3% MgO). The transparency, mechanical properties and microstructure of hot pressed polycrystalline Si3N4-BN composite materials were investigated by UV/VIS spectrophotometer, scanning electron microscopy (SEM) and X-ray diffraction (XRD) techniques. The transparency decreased with increasing the content of h-BN into Si3N4.
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7

Mao, Xiaojian, Shiwei Wang, Shunzo Shimai, and Jingkun Guo. "Transparent Polycrystalline Alumina Ceramics with Orientated Optical Axes." Journal of the American Ceramic Society 91, no. 10 (October 2008): 3431–33. http://dx.doi.org/10.1111/j.1551-2916.2008.02611.x.

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8

Joshi, Bhupendra, Gobinda Gyawali, and Soo Lee. "Recent advances in transparent / translucent polycrystalline Sialon ceramics." Letters on Materials 10, no. 2 (2020): 158–63. http://dx.doi.org/10.22226/2410-3535-2020-2-158-163.

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9

Zeng Zhi-Jiang, Yang Qiu-Hong, and Xu Jun. "Spectroscopic characteristics of Cr3+:Al2O3 polycrystalline transparent alumina ceramics." Acta Physica Sinica 54, no. 11 (2005): 5445. http://dx.doi.org/10.7498/aps.54.5445.

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10

YAGI, Hideki, and Takagimi YANAGITANI. "Recent Progress in Transparent Polycrystalline Ceramics for Optical Applications." Review of Laser Engineering 39, no. 5 (2011): 300–305. http://dx.doi.org/10.2184/lsj.39.300.

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11

Liu, Zuodong, Mengying Jia, Xian Liu, Qiangshan Jing, and Peng Liu. "Fabrication and microstructure characterizations of transparent polycrystalline fluorite ceramics." Materials Letters 227 (September 2018): 233–35. http://dx.doi.org/10.1016/j.matlet.2018.05.097.

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12

Lee, Sang-Ho, Sujarinee Kochawattana, Gary L. Messing, John Q. Dumm, Gregory Quarles, and Vida Castillo. "Solid-State Reactive Sintering of Transparent Polycrystalline Nd:YAG Ceramics." Journal of the American Ceramic Society 89, no. 6 (June 2006): 1945–50. http://dx.doi.org/10.1111/j.1551-2916.2006.01051.x.

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13

Yang, Hao, Le Zhang, Dewei Luo, Xuebin Qiao, Jian Zhang, Ting Zhao, Deyuan Shen, and Dingyuan Tang. "Optical properties of Ho:YAG and Ho:LuAG polycrystalline transparent ceramics." Optical Materials Express 5, no. 1 (December 16, 2014): 142. http://dx.doi.org/10.1364/ome.5.000142.

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14

Li, Ji-Guang, Takayasu Ikegami, and Toshiyuki Mori. "Fabrication of transparent Sc2O3 ceramics with powders thermally pyrolyzed from sulfate." Journal of Materials Research 18, no. 8 (August 2003): 1816–22. http://dx.doi.org/10.1557/jmr.2003.0252.

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Scandia (Sc2O3) is a ceramic material that shows interesting thermal and optical properties, but is difficult to grow as single crystals. As an alternative, in this work we fabricated polycrystalline Sc2O3 transparent ceramics via vacuum sintering, using powders thermally pyrolyzed at 1200 °C from a scandium sulfate salt, Sc2(SO4)3 · 7.8H2O, that we prepared. Characterization of the powders was achieved by differential thermal analysis/thermogravimetry, x-ray diffractometry, Brunauer–Emmett–Teller analysis, and field-emission scanning electron microscopy. Sintering behaviors of the Sc2O3 powders were studied in air via dilatometry. The sulfate salt transforms to oxide at temperatures ≥1000 °C, and the best pyrolysis temperature for transparent ceramics fabrication is 1200 °C, at which the resultant Sc2O3 powder is good in dispersion, ultrafine in particle size (∼80 nm), and almost free from residual sulfur. Transparent ceramics were fabricated from this powder via vacuum sintering at 1625 °C or above. The ceramics sintered at 1700 °C for 4 h exhibit an in-line transmittance of approximately 56–58% in the visible light region at a sample thickness of 1.0 mm.
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15

Li, Fa Hui, Jian Bao Li, Hong Lin, Cun Xin Huang, Mu Yun Lei, and Hong Bing Du. "Development of Transparent MgAl2O4 Spinel Ceramics." Key Engineering Materials 434-435 (March 2010): 649–52. http://dx.doi.org/10.4028/www.scientific.net/kem.434-435.649.

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The present paper summarizes the technology and basic process for fabricating transparent ceramic MgAl2O4 spinel and introduces a scalable production technique. Fully transparent polycrystalline spinel has been prepared by combined vacuum sintering, hot-pressing, sintering in H2 atmosphere and hot isostatic pressing(HIP). The optical transmittance of the specimen sintered at 1500°C following HIP at 1800°C was nearly the same as that of single crystal spinel. When radiated by γ-ray and X- ray, colorless spinel became brown due to V-type color centers, which decreased its transmittance. On the other hand, the spinel ceramics’ resistance to radiation improved by doping CeO2.
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16

Wang, Bo, Quan Xi Cao, Guang Xu, and Sen Tian. "Sintering Process of Nd:YAG Transparent Ceramic." Applied Mechanics and Materials 281 (January 2013): 475–79. http://dx.doi.org/10.4028/www.scientific.net/amm.281.475.

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1.0at% Nd:YAG polycrystalline ceramics were sintered at 1420°C, 1500°C, 1600°C and 1730°C respectively by different heating rate (1°C/min and 5°C/min). The crystal structures were indexed by X-ray diffractometer (XRD). The microstructure and the grain size of the samples were characterized by scanning electron microscope (SEM). The optical transmittance spectra of the samples were measured using V-570 UV spectrophotometer. The sintering process of Nd:YAG ceramics and the effect of heating rate on the microstructure of samples have been investigated.
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17

Yang, Qiu Hong, Shen Zhou Lu, Zhi Jia Bian, Yun Han Li, Zhi Fa Shi, and Ying Zi Li. "Fabrication and Luminescent Properties of Eu3+-Doped Yttrium Lanthanum Oxide Transparent Ceramics." Advanced Materials Research 299-300 (July 2011): 625–28. http://dx.doi.org/10.4028/www.scientific.net/amr.299-300.625.

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High-transparent Eu3+-doped yttrium lanthanum oxide ceramics were fabricated with nanopowders and the highest transmittance in the visible light wavelength region reaches 78%. The Eu3+-doped transparent ceramics exhibited a broad absorption band around 240 nm, a sharp red emission at 611 nm under X-ray excitation and the fluorescent decay time of 0.96 ms. It is expected to be a potential polycrystalline scintillation material for the applications in medical-imaging detectors.
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18

MORITA, Koji, Hidehiro YOSHIDA, and Byung-Nam KIM. "Fabrication of Transparent Polycrystalline Ceramics by Utilizing External Field Effects." Journal of the Japan Society of Powder and Powder Metallurgy 66, no. 4 (April 15, 2019): 158–67. http://dx.doi.org/10.2497/jjspm.66.158.

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19

Fu, Yuelong, Jiang Li, Yang Liu, Zhe Wang, Lei Liu, Hong Zhao, and Yubai Pan. "Fabrication and thermal effects of highly transparent polycrystalline Nd:YAG ceramics." Optical Materials 49 (November 2015): 105–9. http://dx.doi.org/10.1016/j.optmat.2015.09.001.

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20

Pirri, Angela, Guido Toci, Barbara Patrizi, and Matteo Vannini. "An Overview on Yb-Doped Transparent Polycrystalline Sesquioxide Laser Ceramics." IEEE Journal of Selected Topics in Quantum Electronics 24, no. 5 (September 2018): 1–8. http://dx.doi.org/10.1109/jstqe.2018.2799003.

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21

Wang, Guisu, Xia Li, and Yanling Geng. "Preparation of gadolinium gallium garnet polycrystalline powders for transparent ceramics." Journal of Alloys and Compounds 505, no. 1 (August 2010): 213–16. http://dx.doi.org/10.1016/j.jallcom.2010.06.031.

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22

Ma, Ho Jin, and Do Kyung Kim. "Research Trends and Applications of Y2O3-MgO Polycrystalline Nanocomposite for Infrared Transparent Ceramics." Ceramist 23, no. 3 (September 30, 2020): 272–85. http://dx.doi.org/10.31613/ceramist.2020.23.3.03.

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23

Li, Ji-Guang, Takayasu Ikegami, and Toshiyuki Mori. "Solution-Based Processing of Sc2O3 Nanopowders Yielding Transparent Ceramics." Journal of Materials Research 19, no. 3 (March 2004): 733–36. http://dx.doi.org/10.1557/jmr.2004.19.3.733.

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A basic sulfate precursor [Sc(OH)SO4·2H2O] for well-sinterable Sc2O3 powders was precipitated from mixed solutions of scandium nitrate [Sc(NO3)3] and ammonium sulfate [(NH4)2SO4] at room temperature and which was subsequently converted to Sc2O3 via dehydroxylization and desulfurization at temperatures ≥900 °C. With the reactive powders synthesized in this work, polycrystalline Sc2O3 ceramics showing high inline transmittances of approximately 70% in the visible wavelength region (corresponding to ∼90% of the theoretical value of single crystals) have been fabricated via vacuum sintering at a relatively low temperature of 1700 °C.
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24

Yang, Hao, Jian Zhang, Xianpeng Qin, Dewei Luo, Jan Ma, Dingyuan Tang, Hao Chen, Deyuan Shen, and Qitu Zhang. "Polycrystalline Ho:YAG Transparent Ceramics for Eye-Safe Solid State Laser Applications." Journal of the American Ceramic Society 95, no. 1 (November 22, 2011): 52–55. http://dx.doi.org/10.1111/j.1551-2916.2011.04953.x.

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25

Yang Qiu-Hong, Zeng Zhi-Jiang, Xu Jun, and Su Liang-Bi. "Spectroscopic characteristics of transparent polycrystalline MgO and TiO2 codoped Al2O3 ceramics." Acta Physica Sinica 55, no. 6 (2006): 2726. http://dx.doi.org/10.7498/aps.55.2726.

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26

Boyer, Marina, Alberto José Fernandez Carrion, Sandra Ory, Ana Isabel Becerro, Sandrine Villette, Svetlana V. Eliseeva, Stéphane Petoud, Pierre Aballea, Guy Matzen, and Mathieu Allix. "Transparent polycrystalline SrREGa3O7 melilite ceramics: potential phosphors for tuneable solid state lighting." Journal of Materials Chemistry C 4, no. 15 (2016): 3238–47. http://dx.doi.org/10.1039/c6tc00633g.

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Transparent SrREGa3O7 polycrystalline ceramics were prepared from full and congruent glass crystallization. The SrGdGa3O7 material doped with Dy3+ or codoped with Tb3+/Eu3+ exhibits white light emission under UV excitation.
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27

Krell, Andreas, Elmar Strassburger, Thomas Hutzler, and Jens Klimke. "Single and Polycrystalline Transparent Ceramic Armor with Different Crystal Structure." Journal of the American Ceramic Society 96, no. 9 (August 20, 2013): 2718–21. http://dx.doi.org/10.1111/jace.12530.

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28

Voicu, F., C. Gheorghe, and C. Florica. "Preliminary Study In Preparation Of Nd3+: YAG And Sm3+: Y2O3 Transparent Ceramics." Annals of West University of Timisoara - Physics 56, no. 1 (December 1, 2012): 76–80. http://dx.doi.org/10.1515/awutp-2015-0011.

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AbstractIn the present work we present preliminary research on producing of transparent polycrystalline ceramics. Samarium doped Yttrium oxide (1%, 3% and 5%) and Neodymium (1%) doped YAG (Y3Al5O12) translucent ceramics were fabricated by solid-state reaction. Commercial nanopowders was used as the starting materials: Sm2O3 (6μm) and Y2O2 (20-50 nm) for Sm3+: Y2O3 and α-Al2O3, Y2O3 and Nd2O3 (20-50 nm) for Nd3+: YAG. For the preparation of Nd3+: YAG, 0.5 wt% tetraethyl orthosilicate (TEOS) was use as sintering additive, and 1 wt % PEG (polyethylene glycol-400) as dispersant.
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29

Mingsheng, He, Li Jianbao, Lin Hong, Guo Gangfeng, and Liang Long. "Fabrication of Transparent Polycrystalline Yttria Ceramics by Combination of SPS and HIP." Journal of Rare Earths 24, no. 1 (December 2006): 222–24. http://dx.doi.org/10.1016/s1002-0721(07)60365-2.

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30

Wei, George C. "Extrinsic OH- Absorption in Transparent Polycrystalline Lanthana-Doped Yttria." Journal of the American Ceramic Society 71, no. 1 (January 1988): C—20—C—23. http://dx.doi.org/10.1111/j.1151-2916.1988.tb05771.x.

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31

Jiang, DongTao, Dustin M. Hulbert, Umberto Anselmi-Tamburini, Terry Ng, Donald Land, and Amiya K. Mukherjee. "Optically Transparent Polycrystalline Al2O3 Produced by Spark Plasma Sintering." Journal of the American Ceramic Society 91, no. 1 (December 7, 2007): 151–54. http://dx.doi.org/10.1111/j.1551-2916.2007.02086.x.

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32

Mohammadi, Fatemeh, Omid Mirzaee, and Mohammad Tajally. "The Effects of Sintering Atmosphere on the Fabrication of Transparent Polycrystalline YAG Ceramics." Advanced Materials Research 1152 (April 2019): 53–63. http://dx.doi.org/10.4028/www.scientific.net/amr.1152.53.

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In this paper, a mixture of commercial Al2O3 and Y2O3 nanopowders was prepared according to the stoichiometric ratios of YAG (Y3Al5O12) with 0.5 wt% tetraethyl orthosilicate (TEOS) as a sintering aid. The effects of air and vacuum sintering atmosphere were examined on the phase transformation, densification, in-line transmission, microstructure evolution, grain size distribution, sintering trajectories, and grain growth map of the YAG ceramics. The results showed that all samples were pure YAG phase. Nearly pore-free microstructure (99.8%) and narrow grain size distribution (4-10 μm) with an average grain size of 7 μm was obtained for the sample sintered in the vacuum atmosphere, while both inner and inter pores with abnormal grain growth, wider grain size distribution (9-27 μm) with the average grain size of 12 μm were detected in air atmosphere. Also, the results showed that the specimens sintered in vacuum atmosphere had higher relative densities and smaller grain sizes at all sintering temperatures for 6 h. The maximum transmittance at 1064 nm of the YAG ceramics sintered at air and vacuum atmosphere was 26% and 68%, respectively.
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33

Wang, Peng, Joon Hyung Lee, Jeong Joo Kim, Sang Hee Cho, and Hee Young Lee. "Effect of Nb2O5 Content on Microstructure and Dielectric Properties of Ba2-2xNa1-xNb5O15-5x/2 Ceramics." International Journal of Modern Physics B 17, no. 08n09 (April 10, 2003): 1273–78. http://dx.doi.org/10.1142/s0217979203018867.

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The effect of Nb 2 O 5 content on the microstructure development and the dielectric characteristics of tungsten-bronze-structured polycrystalline Ba 2 Na 1 Nb 5 O 15 (BNN) ceramics was studied. The compositions of stoichiometry, Nb 2 O 5–deficient and Nb 2 O 5–excess BNN were prepared and sintered at 1250 °C for 2 h in oxygen. We report the development of second phases, microstructure and dielectric behavior of polycrystalline BNN ceramics, which was not reported ever. The Nb 2 O 5 content affect lattice constant of the sintered body, which contributed to the change of phase transformation temperature. The stoichiometric BNN showed the lowest densification, while an optically transparent sample was obtained in Nb 2 O 5–excess highly dense sample.
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34

Kim, Namchu, Dean A. McHenry, Sei-Joo Jang, and Thomas R. Shrout. "Farbication of Optically Transparent Lead Magnesium Niobate Polycrystalline Ceramics Using Hot Isostatic Pressing." Journal of the American Ceramic Society 73, no. 4 (April 1990): 923–28. http://dx.doi.org/10.1111/j.1151-2916.1990.tb05137.x.

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35

Li, Weiwei, Haijun Huang, Bingchu Mei, Jinghong Song, Guoqiang Yi, and Xinsheng Guo. "Fabrication and characterization of polycrystalline Ho:CaF2 transparent ceramics for 2.0 μm laser application." Materials Letters 207 (November 2017): 37–40. http://dx.doi.org/10.1016/j.matlet.2017.07.057.

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36

Li, Jing, Qiang Chen, Guoying Feng, Wenjuan Wu, Dingquan Xiao, and Jianguo Zhu. "Optical properties of the polycrystalline transparent Nd:YAG ceramics prepared by two-step sintering." Ceramics International 38 (January 2012): S649—S652. http://dx.doi.org/10.1016/j.ceramint.2011.05.127.

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37

Zheng, Kaiping, Hao Wang, Pengyu Xu, Honggang Gu, Bingtian Tu, Weimin Wang, Shiyuan Liu, and Zhengyi Fu. "Effect of nitrogen content on optical properties of transparent γ-AlON polycrystalline ceramics." Journal of the European Ceramic Society 41, no. 7 (July 2021): 4319–26. http://dx.doi.org/10.1016/j.jeurceramsoc.2021.02.047.

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38

Liu, Xue-Jian, Hui-Li Li, Rong-Jun Xie, Naoto Hirosaki, Xin Xu, and Li-Ping Huang. "Cerium-doped lutetium aluminum garnet optically transparent ceramics fabricated by a sol-gel combustion process." Journal of Materials Research 21, no. 6 (June 1, 2006): 1519–25. http://dx.doi.org/10.1557/jmr.2006.0183.

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Nano-sized cerium-doped lutetium aluminum garnet (LuAG:Ce) powders were prepared via a sol-gel combustion process from a mixed solution of metal nitrates, using organic glycine as a fuel. The purified crystalline phase of LuAG:Ce was obtained after calcination at 1000 °C for 2 h. The obtained phosphors were agglomerated and had a foamy-like morphology, consisting of pointed crystallites with uniform size of about 40 nm. Both the photoluminescence and the radioluminescence of the calcined powders showed the same two emission bands, corresponding to transitions from the lowest 5d excited state (2D) to the 4f ground state of Ce3+ (2F5/2, 2F7/2). Using the prepared powders, polycrystalline LuAG:Ce optically transparent ceramics were successfully fabricated at 1850 °C for 10 h under vacuum without sintering aids and annealed at 1450 °C for 20 h in air. The sintered ceramics are transparent with an in-line light transmittance in the visible wavelength range of about 50% and have a uniform microstructure with an average grain size of about 8 μm. The radioluminescence of the transparent ceramics is similar to that for calcined powders, except higher in intensity.
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39

Muller, Andrea M., and David J. Green. "Elastic-Plastic Indentation Response of Two Transparent Fine-Grained Polycrystalline Spinels." Journal of the American Ceramic Society 94, no. 11 (August 5, 2011): 3967–75. http://dx.doi.org/10.1111/j.1551-2916.2011.04770.x.

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40

Goldstein, Adrian, Alexander I. Shames, Adam J. Stevenson, Zvi Cohen, and Marina Vulfson. "Parasitic Light Absorption Processes in Transparent Polycrystalline MgAl2 O4 and YAG." Journal of the American Ceramic Society 96, no. 11 (August 20, 2013): 3523–29. http://dx.doi.org/10.1111/jace.12525.

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41

Rubat du Merac, Marc, Ivar E. Reimanis, and Hans-Joachim Kleebe. "Electrochemical Impedance Spectroscopy of Transparent Polycrystalline Magnesium Aluminate (MgAl2 O4 ) Spinel." Journal of the American Ceramic Society 98, no. 7 (April 15, 2015): 2130–38. http://dx.doi.org/10.1111/jace.13596.

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42

Liu, Zuodong, Qi Gao, Fangfei Chang, Mengying Jia, Mengjun Wei, Guoqiang Yi, Peng Liu, and Qiangshan Jing. "Influence of preparing conditions on the hot‐pressed sintering of transparent polycrystalline fluorite ceramics." International Journal of Applied Ceramic Technology 16, no. 6 (June 4, 2019): 2441–48. http://dx.doi.org/10.1111/ijac.13296.

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43

IKESUE, A., I. FURUSATO, and K. KAMATA. "ChemInform Abstract: Fabrication of Polycrystalline, Transparent YAG Ceramics by a Solid- State Reaction Method." ChemInform 27, no. 17 (August 5, 2010): no. http://dx.doi.org/10.1002/chin.199617258.

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44

Ramavath, Pandu, Papiya Biswas, Kotikalapudi Rajeswari, Madireddy Buchi Suresh, Roy Johnson, Gadhe Padmanabham, Chandrashekhar Sadasiv Kumbhar, Tapas Kumar Chongdar, and Nitin Madhusudan Gokhale. "Optical and mechanical properties of compaction and slip cast processed transparent polycrystalline spinel ceramics." Ceramics International 40, no. 4 (May 2014): 5575–81. http://dx.doi.org/10.1016/j.ceramint.2013.10.149.

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45

Tanaka, Satoshi, Takuma Takahashi, and Keizo Uematsu. "Fabrication of transparent crystal-oriented polycrystalline strontium barium niobate ceramics for electro-optical application." Journal of the European Ceramic Society 34, no. 15 (December 2014): 3723–28. http://dx.doi.org/10.1016/j.jeurceramsoc.2014.05.006.

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46

Jiang, Yiguang, Benxue Jiang, Nan Jiang, Pande Zhang, Shuilin Chen, Qijun Gan, Ge Zhang, et al. "Perfectly transparent pore-free Nd3+-doped Sr9GdF21 polycrystalline ceramics elaborated from single-crystal ceramization." Journal of the European Ceramic Society 37, no. 15 (December 2017): 4912–18. http://dx.doi.org/10.1016/j.jeurceramsoc.2017.05.054.

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47

Zeng, Kaiyang, and David Rowcliffe. "Identification of fracture sequences during sharp indentation of polycrystalline Al2O3." Journal of Materials Research 9, no. 7 (July 1994): 1693–700. http://dx.doi.org/10.1557/jmr.1994.1693.

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The effects of loading and unloading rate on fracture features formed during sharp indentation of polycrystalline Al2O3 have been studied. It was found that there is a transition between intergranular and transgranular fracture if the loading rate is increased by a factor of 104 during the whole indentation cycle. By varying the loading or unloading rate during indentation, and correlating the corresponding dependence of fracture features, the part of the indentation cycle can be identified in which specific segments of cracks are generated. Hence, the fracture sequence during indentation is established. The fracture sequence for polycrystalline Al2O3 is compared with those reported from direct observation in optically transparent materials such as soda-lime glass and various single crystal ceramics.
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48

Fu, Ping, Wen Zhong Lu, Wen Lei, Yong Xu, and Xian Long Lu. "Optical and Microwave Dielectric Properties of Transparent MgAl2O4 Ceramics." Advanced Materials Research 647 (January 2013): 758–61. http://dx.doi.org/10.4028/www.scientific.net/amr.647.758.

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Transparent polycrystalline MgAl2O4ceramics were fabricated by using spark plasma sintering (SPS) technique at a temperature range from 1275 °C to 1400 °C. The average grain size of the samples fabricated at optimal sintering processes was 345 nm. The in-line transmittance of the sintered ceramics can be as high as 70% at 550 nm and 82% at 2000 nm, respectively. The optimal microwave dielectric properties (εr = 8.38, Q×f = 54000 GHz and τf = -74 ppm/°C) were achieved at 1325°C for 20 min.
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49

Castillo-Vega, Gabriel R., Elías H. Penilla, Santiago Camacho-López, Guillermo Aguilar, and J. E. Garay. "Waveguide-like structures written in transparent polycrystalline ceramics with an ultra-low fluence femtosecond laser." Optical Materials Express 2, no. 10 (September 20, 2012): 1416. http://dx.doi.org/10.1364/ome.2.001416.

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50

Yang, Qinghua, Huanping Wang, Shuilin Chen, Long Zhang, and Shiqing Xu. "Highly-oriented (104) polycrystalline α-Al2O3 transparent ceramics prepared by a templated grain growth method." Journal of the European Ceramic Society 39, no. 4 (April 2019): 1721–24. http://dx.doi.org/10.1016/j.jeurceramsoc.2018.11.033.

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