摘要
采用固相合成法制备KZr2(PO4)3(KZP)粉体,研究了KZP陶瓷的烧结特性、热膨胀及抗热冲击性能。通过XRD、Archimedes排水法、热冲击实验和三点弯曲法对KZP的晶体结构、体积密度、抗热冲击性和抗弯强度进行表征。结果表明:添加3 wt%ZnO的KZP试样在1000℃下烧结1 h后,其相对密度可达97.2%,此时KZP试样的平均线性热膨胀系数为0.44×10-6/℃,随着烧结温度的提高,材料的热膨胀系数变为负值;KZP在800℃温差下具有良好的抗热冲击性能,热冲击40次后抗弯强度残余率为92.81%,残余抗弯强度为115.51 MPa。
The sinterability, thermal expansion and thermal shock resistance of KZr2(PO4)3(KZP) synthesized by solid state reaction were investigated. Crystal structure, bulk density, thermal shock resistance and flexure strength were examined by XRD, Archimedes method, thermal shock test and three-point bending method, respectively. The relative density of KZP with 3 wt% ZnO sintered at 1000 ℃ for 1 h, which shown the ultra low thermal expansion coefficient(TEC) of 0.44×10-6 /℃, reached to 97.2%. With the increasing of sintering temperature, the TEC(Thermal Expansion Coefficient) of KZP turned to negative value. KZP exhibited excellent thermal shock resistance at △ T=800 ℃, the flexure strength retention rate achieved to 92.81% after quenching in water for 40 times and the retained flexure strength was 115.51MPa.
出处
《中国陶瓷》
CAS
CSCD
北大核心
2014年第5期25-28,共4页
China Ceramics
基金
长江学者和创新团队发展计划(PCSIRT
IRT1146)
江苏高校优势学科建设工程资助项目(PAPD)
关键词
烧结特性
热膨胀
抗热冲击
抗弯强度
Sinterability
Thermal expansion
Thermal shock resistance
Flexure strength
