熔融石英陶瓷热压铸成型的研究  

Hot Die Casting of Fused Silica Ceramics

作　　者：周彩楼 臧幼洁 李计元 孙佳琦 郭飞 ZHOU Cailou;ZANG Youjie;LI Jiyuan;SUN Jiaqi;GUO Fei(School of Materials Science&Engineering,Tianjin Chengjian University,Tianjin 300384,China)

机构地区：[1]天津城建大学材料科学与工程学院,天津300384

出　　处：《陶瓷学报》2020年第1期42-46,共5页Journal of Ceramics

基　　金：天津市科技计划项目(11JCYBJC01800)。

摘　　要：熔融石英陶瓷具有热膨胀系数小、热稳定好、介电常数低等优良特性。通过热压铸成型实验分别研究了热压铸成型中石蜡、油酸、硬脂酸的加入量对蜡浆流动性的影响;同时探究了烧成温度对密度、收缩率、吸水率的影响。结果表明,当石蜡用量为23wt.%、硬脂酸用量为5wt.%、油酸用量为0.6wt.%时,蜡浆的流动性能最好值为77%。流动性能对熔融石英热压铸成型有着极其重要的作用,当流动性好时,热压铸成型过程中蜡浆能保持均匀不分层,成型的制品也更加致密。Fused silica ceramics have various advantages,such as small thermal expansion coefficient,high thermal stability and low dielectric constant.The effects of the contents of paraffin,oleic acid and stearic acid on the fluidity of wax paste in the hot die casting process were studied.The influence of sintering temperature on density,shrinkage and water absorption of the sample s was also examined.It was found that the optimal contents of paraffin,stearic acid and oleic acid were 23 wt.%,5 wt.%and 0.6 wt.%,respectively,leading to the highest flow performance of the wax slurry(77%).The flow properties are critical to the hot die casting of fused silica.With an optimal fluidity,the wax paste would be sufficiently uniform and thus wo uld not be stratified during the hot die casting process,thus enabling more compact products.

关 键 词：熔融石英 热压铸成型 流动性能 

分 类 号：TQ174.75[化学工程—陶瓷工业]