摘要
采用正交设计方法研究了硅微粉、氧化铝微粉及烧成温度对刚玉莫来石复相陶瓷热震稳定性及蠕变性能的影响机制。结果表明:烧结温度对复相陶瓷热震稳定性及蠕变性的影响最大,氧化铝微粉次之,硅微粉最小。高温抗折强度损失率在烧成温度为1650℃时最低,随氧化铝的含量增加而减小,并随硅微粉含量增加而增大。蠕变率随烧成温度的提高而减少,氧化铝质量分数为7%时最低,并随硅微粉含量增加而增大。通过调节硅微粉、氧化铝微粉及烧结温度,可控制颗粒与基质、莫来石的结合状态,气孔及残留α-Al2O3,从而改善材料的抗热震性及蠕变性。
The effects of microsilica,alumina and sintering temperature on th e thermal shock resistance and creep property of corundum- mullite duplex ceram ics were investigated by orthogonal experiment. It was found that the effect of sintering temperature on thermal shock resistance and creep property was the mos t, alumina the second and microsilica the lest. The loss ratio of high temperat ure strength was the least at 1650℃ ,it decreased with the increase of alumina and increased with the increase of the amounts of microsilica. The creep ratio d ecreased with the increase of sintering temperature,it was the least at the amou nt of alumina 7% and increased with the increase of microsilica. Adjusting mic rosilica, alumina and sintering temperature , the combination of particles with matrix and mullite,the porosity and the residual α - Al2O3 can be controlled,s o that the thermal shock resistance and creep property were improved.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
2005年第3期6-8,13,共4页
Bulletin of the Chinese Ceramic Society
基金
浙江省科技重点计划项目(2004C21021).
