低热膨胀系数堇青石材料的合成研究  

Study on Lower Thermal Expansion Coefficient of Synthetic Cordierite Materials

作　　者：李小龙[1] 沈塔[1] 

机构地区：[1]江西陶瓷工艺美术职业技术学院,景德镇333001

出　　处：《中国陶瓷》2015年第10期59-64,共6页China Ceramics

基　　金：国家科技支撑计划课题(2011BAC11B08)

摘　　要：以高岭土、烧滑石和氧化镁为原料合成堇青石,研究了烧成温度、镁铝硅含量及高岭土种类对合成堇青石热膨胀系数的影响。实验结果表明:合成堇青石的最佳配方1#高岭土82.4 wt%、滑石9.3 wt%、氧化镁8.4 wt%,试样热膨胀系数为1.24×10-6℃-1。适当的提高烧成温度可得到热膨胀系数低的堇青石材料,但合成温度过高则会因为形成过多的玻璃相而使其热膨胀系数增大。过多或过少的引入Si O2、Al2O3、Mg O均会由于形成高热膨胀系数的晶相而导致所合成堇青石的热膨胀系数增大。Cordierite was synthesized using kaolin, talc and magnesia as raw materials. Effect of firing temperature, content of（silicon, aluminum, magnesium） in formulation and type of kaolin was studied on the thermal expansion coefficient of synthetic cordierite. The result shows that the lowest thermal expansion was 1.24×10^-6/℃ of the experimental synthetic cordierite material, Formulas for the experiments were 82.4 wt% 1# kaolin, 9.3 wt% talc and 8.4 wt% magnesium oxide. Lower expansion cordierite can be synthesized by increasing synthesis temperature appropriately, but too high temperature brings about the opposite result. Too much or too little silicon, aluminum or magnesium leads to the synthetic cordierite with larger thermal expansion coefficient because of the formation of high expansion crystal phases.

关 键 词：堇青石 热膨胀系数 烧成温度 高岭土种类 

分 类 号：TQ174.758.1[化学工程—陶瓷工业]