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1.热处理对氧化铝陶瓷的影响在高温金属化过程中,很可能出现氧化铝陶瓷的弯曲和尺寸变化等现象。因而,必须研究热处理对高氧化铝瓷体的影响。为了测定高氧化铝瓷体在一般金属化(1475℃)操作时的尺寸变化,将10个氧化铝样品(直径为1时,厚0.050时)首先在900℃下在空气中烧结,然后在1475℃下在氨气中烧结。在每次烧结后测量尺寸的线性变化。结果发现,在900℃的烧结后,尺寸未发生变化,而在1475℃的烧结之后,每时平均增加0.00044时。在另一试验中,在1475℃下在氨气中
1. Heat treatment on the impact of alumina ceramic In the high temperature metallization, alumina ceramic bending and size may appear phenomenon. Therefore, the impact of heat treatment on high alumina ceramics must be studied. To determine the dimensional change of high alumina porcelain during typical metallisation (1475 ° C) operation, 10 alumina samples (at a thickness of 0.050 for a diameter of 1) were first sintered in air at 900 ° C and then sintered in 1475 ℃ in ammonia sintering. The linear change in size was measured after each sintering. As a result, it was found that the size did not change after sintering at 900 ° C, but increased by 0.00044 hours per hour after sintering at 1475 ° C. In another experiment, at 1475 ° C in ammonia