ZTM/SiCp陶瓷的微波烧结研究

RESEARCH ON MICROWAVE SINTERING ZTM/SiCp CERAMICS

用微波烧结成功ＺＴＭ／ＳｉＣｐ三相复合陶瓷，ＳｉＣ含量达到３０ｖｏｌ％．提出“热过冲自我抑制”的思想．利用Ａｌ２Ｏ３＋ＳｉＯ２→Ｍｕｌ反应在微波烧结ＺＴＭ／ＳｉＣｐ陶瓷中实现了“热过冲自我抑制”．提出临界电场强度Ｅ＊可作为判断是否会出现“热过冲”的判据．埋粉是调节微波场强的有效手段．ＳｉＣ在低含量范围内有促进烧结的作用．

In the microwave cavity the three phase ceramic composite ZTM/SiCp has been successfully sintered. The idea of ‘self inhibiting of thermal runaway’ was put forward and aplied to sintering ZTM/SiCp by the reaction Al 2O 3+SiO 2→Mul. The critical electrical field strength E * was regarded as a criterion which decides weather thermal runaway would occur. Changing the powder bed can adjust the field strength. SiC in ZTM/SiCp is able to accelerate sentering when its content is less than 30 vol%.