中文摘要：

石膏的表面粗糙上的 sintering 温度的效果结合了投资被调查发现适当 sintering 温度申请了微投资的扔。表面粗糙测试在为从钙硫酸盐 -hemihydrate 和石英粉末混合的投资混合物从房间温度到 1,000 的 sintering 温度被执行(wt.% ， 6:4；5:5， 4:6， 3:7 ) 。在这个实验，每投资混合物被与好表面粗糙(Ra 0.2 瓮) 把投资材料倒进一个塑料瓶子准备。DTA-TG 曲线用一个热分析器被测量在不同温度调查表面粗糙的差别。结果证明石膏的表面粗糙结合了投资是温度敏感。模子的预热温度应该直到 600，然而并非超过 700，并且有 60 % 灰浆的投资混合物和 40 % 石英粉末为准备微观结构是适用的。有 100 公里直径的微观结构在现在的研究被生产。结果证明扔的表面粗糙仅仅是 Ra 0.51 瓮，比投资模子的稍微不平。

英文摘要：

The effects of sintering temperature on the surface roughness of gypsum bonded investments were investigated to find the appropriate sintering temperature applied for micro-investment casting.The surface roughness tests were carried out at sintering temperatures ranging from room temperature to 1,000 ℃ for investment compounds mixed from calcium sulphate α-hemihydrate and quartz powder （wt.%, 6：4; 5：5, 4：6, 3：7）.In this experiment, each investment compound was prepared by pouring the investment materials into a plastic bottle with the good surface roughness （Ra～0.2 μm）.DTA-TG curves were measured using a thermal analyzer to investigate the difference of surface roughness at different temperatures.The results show that the surface roughness of gypsum bonded investment is temperature sensitive.The preheating temperature of the mold should be up to 600 ℃, but not over 700 ℃, and the investment compound with 60 % plaster and 40 % quartz powder is applicable for preparing the micro-structures.The micro-structures with 100 μm diameter were produced in the present studies.The results show that the surface roughness of the casting is only Ra～0.51 μm, slightly rougher than that of the investment mold.