成型工艺对陶瓷模具石膏性能的影响  

Effect of Molding Technics on the Performance of Model-gypsum

作　　者：赵敏[1] 彭家惠[1] 魏桂芳[1] 朱登玲[1] 

机构地区：[1]重庆大学材料科学与工程学院,重庆400030

出　　处：《硅酸盐通报》2013年第1期176-180,共5页Bulletin of the Chinese Ceramic Society

摘　　要：运用正交试验研究了陶瓷模具石膏主要成型工艺即体系温度、搅拌时间、浆体流态、搅拌速度四个因素对其抗折强度及吸水率的影响。结果表明:搅拌时间是影响强度的最主要因素,浆体流态、体系温度次之,搅拌速度影响最小,且前三者为显著影响因素;影响吸水率的主要及显著因素为浆体流态,其次依次为体系温度、搅拌时间,搅拌速度;确定了模具石膏最佳成型工艺条件范围为标准稠度需水量、体系温度(14±2)℃、搅拌时间2～3 min、搅拌速度(300±10)r/min,此时石膏绝干抗折强度高达6.98 MPa、吸水率约为39%。By adopting the method of orthogonal experimental design, the influence of four independent variables, that is slurry-flowing state, stirring time, the system temperature and stirring rate on modelgypsum was studied. The mechanism was investigated. The result shows that stirring time is one of the most important factors affecting flexural strength and water absorption, secondly slurry-flowing rate and the system temperature. Slurry-flowing rate is the most important factor affecting absorption. Stirring rate has little influence on the both performances. The best molding condition was defined by the experiment.

关 键 词：模具石膏 浆体流态 体系温度 抗折强度 吸水率 

分 类 号：TQ174[化学工程—陶瓷工业]