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Relevant bibliographies by topics / Thermoelectric Cement Composite

Academic literature on the topic 'Thermoelectric Cement Composite'

Author: Grafiati

Published: 10 December 2022

Last updated: 28 January 2023

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Journal articles on the topic "Thermoelectric Cement Composite"

1

Zuo, Jun Qing, Wu Yao, Jun Jie Qin, and Hai Yong Cao. "Measurements of Thermoelectric Behavior and Microstructure of Carbon Nanotubes/Carbon Fiber-Cement Based Composite." Key Engineering Materials 492 (September 2011): 242–45. http://dx.doi.org/10.4028/www.scientific.net/kem.492.242.

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Thermoelectric behavior and microstructure of carbon nanotubes/carbon fiber(CNTs/CF)- cement based composite have been measured in this study. An self-made experimental setup was applied to test the thermoelectric power (TEP) of the composites. The results show that the higher the CNTs content, the less positive the absolute thermoelectric power is. When CNTs addition incresed to 1.0% by weight of cement, the absolute thermoelectric power changed sign from positive to negative. Scanning electron microscopy (SEM) was used to characterize the morphology of CNTs, CF and the structure of Portland cement-CNTs-CF systems. SEM analysis of the results show that good interfacial adhesion between CNTs and cement matrix is seen with CNTs tightly wrapped by Calcium-Silicate-Hydrate (C-S-H). With the incorporation of CNTs/CF in cement based composite, the cement-CNTs-CF system exhibits a porous microstructure.

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2

Ji, Tao, Xiao Liao, Shiping Zhang, Yan He, Xiaoying Zhang, Xiong Zhang, and Weihua Li. "Cement-Based Thermoelectric Device for Protection of Carbon Steel in Alkaline Chloride Solution." Materials 15, no. 13 (June 24, 2022): 4461. http://dx.doi.org/10.3390/ma15134461.

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The thermoelectric cement-based materials can convert heat into electricity; this makes them promising candidates for impressed current cathodic protection of carbon steel. However, attempts to use the thermoelectric cement-based materials for energy conversion usually results in low conversion efficiency, because of the low electrical conductivity and Seebeck coefficient. Herein, we deposited polyaniline on the surface of MnO2 and fabricated a cement-based thermoelectric device with added PANI/MnO2 composite for the protection of carbon steel in alkaline chloride solution. The nanorod structure (70~80 nm in diameter) and evenly dispersed conductive PANI provide the PANI/MnO2 composite with good electrical conductivity (1.9 ± 0.03 S/cm) and Seebeck coefficient (−7.71 × 103 ± 50 μV/K) and, thereby, increase the Seebeck coefficient of cement-based materials to −2.02 × 103 ± 40 μV/K and the electrical conductivity of cement-based materials to 0.015 ± 0.0003 S/cm. Based on this, the corrosion of the carbon steel was delayed after cathodic protection, which was demonstrated by the electrochemical experiment results, such as the increased resistance of the carbon steel surface from 5.16 × 102 Ω·cm2 to 5.14 × 104 Ω·cm2, increased charge transfer resistance from 11.4 kΩ·cm2 to 1.98 × 106 kΩ·cm2, and the decreased corrosion current density from 1.67 μA/cm2 to 0.32 μA/cm2, underlining the role of anti-corrosion of the PANI/MnO2 composite in the cathodic protection system.

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3

Frąc, Maksymilian, Paulina Szołdra, and Waldemar Pichór. "Smart Graphite–Cement Composites with Low Percolation Threshold." Materials 15, no. 8 (April 9, 2022): 2770. http://dx.doi.org/10.3390/ma15082770.

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The objective of this work was to obtain cement composites with low percolation thresholds, which would reduce the cost of graphite and maintain good mechanical properties. For this purpose, exfoliated graphite was used as a conductive additive, which was obtained by exfoliating the expanded graphite via ultrasonic irradiation in a water bath with surfactant. To obtain evenly distributed graphite particles, the exfoliated graphite was incorporated with the remaining surfactant into the matrix. This study is limited to investigating the influence of exfoliated graphite on the electrical and mechanical properties of cement mortars. The electrical conductivity of the composites was investigated to determine the percolation threshold. The flexural and compressive strength was tested to assess the mechanical properties. In terms of the practical applications of these composites, the piezoresistive, temperature–resistivity, and thermoelectric properties were studied. The results showed that the incorporation of exfoliated graphite with surfactant is an effective way to obtain a composite with a percolation threshold as low as 0.96% (total volume of the composite). In addition, the mechanical properties of the composites are satisfactory for practical application. These composites also have good properties in terms of practical applications. As a result, the exfoliated graphite used can significantly facilitate the practical use of smart composites.

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4

Cao, Hai Yong, Wu Yao, and Jun Jie Qin. "Seebeck Effect in Graphite-Carbon Fiber Cement Based Composite." Advanced Materials Research 177 (December 2010): 566–69. http://dx.doi.org/10.4028/www.scientific.net/amr.177.566.

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The Seebeck effect in carbon fiber reinforced cement-based composite (CFRC) is of interest because it enables the cement-based materials to sense its own temperature without attached or embedded sensor. In this study, the Seebeck coefficient of CFRC and graphite-carbon fiber cement based composite were measured. Results show that the addition of graphite can enhance the Seebeck effect of CFRC. When graphite content is 10wt. %, all types of CFRC show P-type because the hole contribution from carbon fiber dominates the Seebeck effect. When the graphite content is 20wt. %, the change of thermoelectric power (TEP) from positive to negative occurs with the increasing of graphite to carbon fiber ratio (≥25). This phenomenon indicates that compensation takes place between electron contribution from graphite and hole contribution from carbon fiber. At a high graphite content (30wt. %), CFRC shows N-type above a certain temperature difference (20-25°C) since the electrons from graphite dominate the Seebeck effect.

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5

Ji, Tao, Shiping Zhang, Yan He, Xiaoying Zhang, Xiong Zhang, and Weihua Li. "Enhanced thermoelectric property of cement-based materials with the synthesized MnO2/carbon fiber composite." Journal of Building Engineering 43 (November 2021): 103190. http://dx.doi.org/10.1016/j.jobe.2021.103190.

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6

Ghahari, SeyedAli, Ehsan Ghafari, and Na Lu. "Effect of ZnO nanoparticles on thermoelectric properties of cement composite for waste heat harvesting." Construction and Building Materials 146 (August 2017): 755–63. http://dx.doi.org/10.1016/j.conbuildmat.2017.04.165.

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7

Ji, Tao, Xiao Liao, Yan He, Shiping Zhang, Xiaoying Zhang, Xiong Zhang, and Weihua Li. "Effect of Polyaniline/manganese Dioxide Composite on the Thermoelectric Effect of Cement-based Materials." Journal of Wuhan University of Technology-Mater. Sci. Ed. 38, no. 1 (January 16, 2023): 109–16. http://dx.doi.org/10.1007/s11595-023-2673-0.

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8

Ji, Tao, Xiong Zhang, and Weihua Li. "Enhanced thermoelectric effect of cement composite by addition of metallic oxide nanopowders for energy harvesting in buildings." Construction and Building Materials 115 (July 2016): 576–81. http://dx.doi.org/10.1016/j.conbuildmat.2016.04.035.

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9

Wei, Jian, Yuqi Zhou, Yuan Wang, Zhuang Miao, Yupeng Guo, Hao Zhang, Xueting Li, Zhipeng Wang, and Zongmo Shi. "A large-sized thermoelectric module composed of cement-based composite blocks for pavement energy harvesting and surface temperature reducing." Energy 265 (February 2023): 126398. http://dx.doi.org/10.1016/j.energy.2022.126398.

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10

Zuo, Jun Qing, Wu Yao, and Jun Jie Qin. "Enhancing the Thermoelectric Properties in Carbon Fiber/Cement Composites by Using Steel Slag." Key Engineering Materials 539 (January 2013): 103–7. http://dx.doi.org/10.4028/www.scientific.net/kem.539.103.

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Thermoelectric properties of steel slag-carbon fiber/cement composites were studied in this paper. The effect of steel slag content on thermoelectric properties was focused on especially. The experimental results show that the addition of steel slag leads to an increase in the positive thermoelectric power of the cabon fiber/cement composites. The highest absolute thermoelectric power of carbon fiber/cement composites was rendered as positive as 14.4µV/°C by using steel slag, which had a high concentration of holes. Beside, a good linear relationship was observed between thermoelectric power and temperature differential on the specimen.

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Book chapters on the topic "Thermoelectric Cement Composite"

1

Pichór, Waldemar, and Maksymilian Frąc. "Electric and thermoelectric properties of cement composites with expanded graphite." In Brittle Matrix Composites 10, 43–50. Elsevier, 2012. http://dx.doi.org/10.1533/9780857099891.43.

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