摘要
以αAl2O3,TiO2,ZrO2为主要原料,以MgO,SiO2,Fe2O3为稳定剂,经1500℃×2h烧结可制得低热膨胀系数的Al2TiO5ZrO2复相材料。实验发现:随试样中ZrO2含量的提高或随ZrO2稳定程度的提高,Al2TiO5ZrO2材料的RT～1000℃热膨胀系数逐步降低,这与材料复合体热膨胀系数的常规相悖。ATZ5试样的抗弯强度为39.15MPa,吸水率为3.28%,热膨胀系数为4.46×10-6/℃,其抗热震性能优良,可承受的热震温差是P ZrO2试样的1.62倍。
The Al2TiO5-ZrO22 multiphase material was prepared at 1500°C X 2 h with α-Al2O3, TiO2, ZrO2 as raw materials and with MgO, SiO2, Fe2O3 as stability additives. The results show that thermal expansion coefficient of the sample at RT-1000°C decreases gradually with increase of ZrO2 a-mount or the stability degree of ZrO2 in samples. This is different from behavior of ordinary multiphase material. The sample of ATZ-5 with bending strength of 39.15 MPa, water suction rate of 3.28% and thermal expansion coefficient of 4.46 × 10-6/°C has excellent performance of thermal shock resistance and can resist 1.62 times thermal shock temperature interval of P-ZrO2.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2005年第5期38-41,共4页
Journal of Materials Engineering
基金
河北省科技攻关计划项目(03212218)
关键词
AL2TIO5
ZRO2
直接合成
热膨胀
抗热震
aluminum titanate
zirconia
original synthesis
thermal expansion
thermal shock resistance
