试题与答案

PFM烧结过程,下列说法正确的有() A.正式烧结之前应干燥5~7分钟,防止固瓷层内

题型:多项选择题

题目:

PFM烧结过程,下列说法正确的有()

A.正式烧结之前应干燥5~7分钟,防止固瓷层内残留水分过多在加热烧结时形成气泡

B.烧结温度应比遮色瓷烧结温度低10℃~20℃

C.烧结程序结束时,应及时将烘烤盘移至圹掌平台之外

D.烧结起始温度低,升温速度过慢,会延长烧结时间,易引起牙冠变形或颜色变浊

E.烧结开始时应1~230L/分钟速度排气,以低于瓷熔点100℃以下温度升温

答案:

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参考答案:B

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