摘要
以α Al2O3,TiO2,ZrO2 为主要原料,以MgO SiO2 或MgO Fe2O3 为稳定剂,经1 500 ℃×2 h烧成可制得低热膨胀系数的Al2TiO5 ZrO2 复相材料。试验发现:随试样中ZrO2 含量的提高或ZrO2 稳定程度的提高,Al2TiO5 ZrO2 材料的RT^1 000 ℃热膨胀系数逐步降低,这与陶瓷复合体热膨胀系数的常规相背。ATZ 5试样的抗折强度为39.15 MPa,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1.6倍。
The Al_2TiO_5ZrO_2 multiphase ceramic material can be prepared at 1500℃×2h with αAl_2O_3,TiO_2 and ZrO_2 as raw material and with MgOSiO_2 or MgOFe_2O_3 as stability additive. The results show that thermal expansion coefficient of the sample at RT～1 000 ℃ decreases gradually with the increase of ZrO_2 or the stability of ZrO_2 in samples. This is reverse with the variation of thermal expansion coefficient of ordinary multiphase ceramics.The sample of ATZ5 with bending strength of 39.15 MPa, water-absorbing rate of 3.28% and thermal expansion coefficient of 4.46×10^(-6) /℃ has excellent performance of thermal shock resistance and can bear the thermal shock temperature difference 1.6 times that of sample PZrO_2.
出处
《唐山学院学报》
2005年第1期101-103,共3页
Journal of Tangshan University
关键词
氧化锆
钛酸铝
复相陶瓷材料
热膨胀系数
Al_2TiO_5
ZrO_2
original synthesis
thermal expansion
thermal shock resistance
