Characteristics of CaZrO 3 material prepared by in situ decomposition pore forming technology

• Published in: International journal of applied ceramic technology 2022-07, Vol.19 (4), p.2073-2082
• Main Authors: Wang, Fangzhou, Wei, Yaowu, Wei, Jiawei, Li, Bingrong, Xiao, Junli, Chen, Junfeng, Li, Nan
• Format: Article
• Language: English
• ISSN: 1546-542X; 1744-7402
• DOI: 10.1111/ijac.14039

CaZrO 3 samples were prepared by in situ decomposition pore forming technology in this paper. The influence of calcia/zirconia molar ratio and heating treatment on the microstructure and thermal conductivity of the sintered samples were investigated. The phase analysis of CaZrO 3 samples was detected by X‐ray diffraction, and the microscopic morphology of CaZrO 3 was observed by scanning electron microscope combined with energy dispersive spectrometer for microzone composition analysis. The results showed that a satisfied CaZrO 3 sample could be obtained by in situ decomposition pore forming technology with calcium/zirconium molar ratio of 1:1.02. The CaZrO 3 grains were developed better when the samples were preheated at 200°C first and then heated at 1600°C for 3 h. The apparent porosity of CaZrO 3 samples were increased to 28.5%, and the thermal conductivity reduced to 1.219 W/(m·K) compared with the heavy CaZrO 3 samples, which could be used as CaZrO 3 refractory aggregates with the lower thermal conductivity.