微波热效应陶瓷材料性能研究

Study on the Properties of Microwave Thermal Effect Ceramics

采用常压烧结法合成了Fe2O3-莫来石微波热效应陶瓷材料,并对材料的抗弯强度、抗热震性能及介电性能进行了研究。结果表明,随烧结温度由1250℃升高至1350℃,烧结样品中残留的刚玉相减少,微波热效应陶瓷材料的体积密度、抗弯强度显著增大,相对介电常数随Fe2O3含量增加而增大,气孔率适中。在最佳烧结温度1350℃,氧化铁含量为30%,莫来石理论含量为70%条件下,制备的微波热效应陶瓷材料的体积密度为2.185g/cm3,抗压强度为77MPa,相对介电常数适中,满足微波热效应陶瓷性能要求。

The Fe2 O3-molanstone microwave thermal effect ceramics were synthesized by sintering at normal atmosphere, and bending strength, thermal shock resistance and dielectric properties of the ceramics are studied. The results show that the content of remnant corundum phase after sintering decreases with the increase of temperature from 1250℃ to 1350℃,the bulk density and the bending strength of microwave thermal effect ceramic materials in- crease significantly, the relative dielectric constants are significantly higher with the increase of Fe2O3 content, and the porosity is moderate. While the content of ferric oxide is 30 % and the theory content of mullite is 70%, with the best sintering temperature of 1350℃, the microwave thermal effect ceramic volume density is 2. 185 g/cm3 , the bending strength is 77MPa, the relative dielectric constant is moderate, which can meet the requirements of microwave thermal effect ceramic performance.