The properties of the amalgams of spherical powders, such as dimension change during hardening, compressive strength, flow and creep meet the specification No.

球粉汞齐的性能，诸如固化过程中的尺寸变化，压缩强度，流变及蠕变等均达到美国牙医协会技术指标。

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The thermal mechanical analyzer is used to obtain the dimension change of EMC at different temperatures; And the thermal expansion coefficient of EMC is achieved by using linear fitting.

利用热机械分析仪获得了EMC材料在不同温度时的尺寸变化量，并通过线性拟合得到了EMC材料的热膨胀系数。

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Accordingly it is very important to control and forecast the dimension change and the geometric shape variation of the final product in the powder metallurgy process, especially the design of mould.

因此，在粉末冶金工艺中，对尺寸变化尤其是对模具尺寸的设计进行控制与预测是非常重要的。

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