亚纳米SiO_2对硅溶胶型壳硬化时间的影响  

The Effect of Subnano-SiO_2 to Harden Time of Silica Sol Shell Molding

作　　者：袁新强[1] 曾明[1] 沈保罗[2] 顾艳[3] 

机构地区：[1]西华大学材料科学与工程学院,四川成都610039 [2]四川大学材料科学与工程学院,四川成都610065 [3]浙江理工大学材料与纺织学院,浙江杭州310018

出　　处：《铸造》2007年第1期82-83,共2页Foundry

摘　　要：对添加15%NH4Cl和亚纳米SiO2的硅溶胶型壳硬化时间进行试验研究。研究发现硅溶胶型壳硬化时间随着NH4Cl加入量的增加而降低,随着亚纳米SiO2加入量的增加先降低后升高再降低,而且亚纳米SiO2单独作用硅溶胶效果不明显,只有加入NH4Cl后添加亚纳米SiO2硅溶胶型壳硬化时间相对未添加的要缩短到几分之一至几十分之一。结果表明亚纳米SiO2具有加快NH4Cl的促凝硬化作用,可以减少NH4Cl的加入量。The experimental study on harden time of silica sol shell molding with 15% NH4Cl and subnano-SiO2 was run in this paper. It is found that the harden time t of silica sol shell molding is decreasing with the increasing of NH4Cl addition v, reducing first then raising and reducing again with the increasing of subnano-SiO2 addition m in this work. And the action of subnano-SiO2 acted on silica sol individually is obscure. Harden time of subnano-SiO2 addition silica sol shell molding shorten several to dozens times compared with no subnano-SiO2 addition ＂only with addition of NH4Cl. The experimental results show subnano-SiO2 has played an acceleration coagulant harden of NH4Cl role, and reducing addition of NH4Cl.

关 键 词：亚纳米SiO2 硅溶胶型壳 硬化时间 

分 类 号：TG249.5[机械工程—精密仪器及机械]