Fabrication and characterisation of ZrO2-reinforced porous mullite ceramics
Fabrication and characterisation of ZrO2-reinforced porous mullite ceramics
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DOI：
10.1080/17436753.2022.2155369
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发表时间：
2022-07
影响因子：
2.2
通讯作者：
Pengyu Ji;Chenghao Song;Yongwan Wu;Hailiang Deng;X. Deng;Yi Zhang;Xiang-jin Ding;Haijun Zhang
中科院分区：
文献类型：
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作者：
Pengyu Ji;Chenghao Song;Yongwan Wu;Hailiang Deng;X. Deng;Yi Zhang;Xiang-jin Ding;Haijun Zhang
以锆英石（ZrSiO4）粉末和氧化铝（Al2O3）粉末为原料，采用泡沫-凝胶铸造法制备了zro2增强多孔莫来石陶瓷。分析了烧结温度对多孔试样相组成的影响。在此基础上，研究了发泡剂对1600℃焙烧zro2增强多孔莫来石的物理性能、微观结构、机械强度和导热性能的影响。在本研究中，zro2增强多孔莫来石陶瓷的线收缩率、孔隙率和平均孔径增大，体积密度、机械强度和导热系数减小。当发泡剂用量为1.0 vol.-%时，孔隙率为77.4%的zro2增强多孔莫来石试样的抗折强度和抗压强度分别达到3.0和10.9 MPa，导热系数保持在0.181 W m−1 K−1。
ZrO2-reinforced porous mullite ceramics were fabricated by a foam-gel casting approach using zircon (ZrSiO4) powders and alumina (Al2O3) powders as raw materials. The influence of firing temperature on the phase composition of porous samples was analysed. Based on the analysis results, the effects of a blowing agent on the physical properties, microstructure, mechanical strength and heat conductivity of ZrO2-reinforced porous mullite samples fired at 1600°C were investigated. In the present study, linear shrinkage, porosity and mean pore size of ZrO2-reinforced porous mullite ceramics increased, and volume density, mechanical strength and heat conductivity decreased. When the dosage of the blowing agent was 1.0 vol.-%, the flexural strength and compressive strength of ZrO2-reinforced porous mullite sample with 77.4% porosity respectively reached 3.0 and 10.9 MPa, and their heat conductivity was kept at 0.181 W m−1 K−1.