目的：探讨热处理过程对玻璃陶瓷断裂韧性的影响。
Objective: the purpose of this study was to learn the influence of heat treatment on fracture toughness of dental glass ceramic.
陶瓷作为刀具材料的最大弱点是断裂韧性低，脆性大。
Most weak point of the ceramics tool is break, low toughness, high brittleness.
与块体莫来石陶瓷相比，在保证材料强度降低较小的情况下断裂韧性提高了62%。
The fracture toughness of the composite was increased 62% with little decrease of flexure strength when compared with mullite monolithic ceramics.
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