氧化铈掺杂氧化钇稳定氧化锆的热膨胀特性

Abstract

Abstract: Effect of CeO₂ doping on coefficient of thermal expansion of Y_0.06Zr_0.94O_1.97 (Y₂O₃-ZrO₂ compound) was studied.Ce_xY_0.06Zr_0.94-xO_1.97(0.08≤x≤0.16) compound was prepared via co-precipitation method.After pressing molding,the roasting temperatures were determined according to heat shrinkage curve of the sample.Samples were respectively sintered at 1 250,1 350,1 450 ℃ for 3 h in high-temperature electric resistance furnace.Their micro-structures were analyzed by XRD and SEM,and the coefficients of thermal expansion were measured by thermal expansion instrument.Results indicated that the coefficient of thermal expansion of Ce_xY_0.06Zr_0.94-xO_1.97(0.08≤x≤0.16) was higher than that ofY_0.06Zr_0.94O_1.97,because the constant of crystal lattice was increased and material′s chemical bonds were effectively weakened by doping CeO₂ in Y₂O₃-ZrO₂.

Key words: Ce_xY_0.06Zr_0.94-xO_1.97, co-precipitation, micro-structure, thermal expansion

CLC Number:

TQ174.75

ZHAO Wen-Guang, WANG Ze-Fei, ZHANG Hui-Feng, AN Sheng-Li. Thermal expansion performance of Y₂O₃-ZrO₂ doped with CeO₂[J]. INORGANICCHEMICALSINDUSTRY, 2011, 43(3): 21-.

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Inorganic Acid-Base-Salt Committee of CIESC

Thermal expansion performance of Y₂O₃-ZrO₂ doped with CeO₂

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Thermal expansion performance of Y₂O₃-ZrO₂ doped with CeO₂