柠檬酸改性磷酸盐无机铸造粘结剂研究  

Study on Phosphate Foundry Binder Modified by Citric Acid

作　　者：杨金[1] 张友寿[1] 夏露[1] 黄晋[1] 李四年[1] 

机构地区：[1]湖北工业大学机械工程学院,湖北武汉430068

出　　处：《铸造设备研究》2008年第5期38-40,共3页Research Studies On Foundry Equipment

基　　金：湖北省自然科学基金项目(鄂科技发计[2005]28号文;项目编号:2005ABA056)

摘　　要：通过采用柠檬酸对铝磷酸盐进行改性,试验发现,在高中和度下加入柠檬酸能获得良好稳定性的铝磷酸盐粘结剂,但柠檬酸损害低中和度粘结剂的稳定性。柠檬酸能一定程度地提高自硬砂强度,特别是在快速硬化条件下,砂型具有较高的强度,柠檬酸改性粘结剂自硬砂强度受空气湿度影响较大。The modification of phosphate binder by citric acid was stuided in this paper. Experiments showed that good stability of high neutralization degree phosphate binder was obtained modified by citric acid, but stability of low neutralization degree phosphate binder was damaged by citric acid. Strength of no-bake sand was raised to some extent by citric acid, especially in rapid reaction. Air humidity has great effect on strength of citric acid modified binder sand.

关 键 词：柠檬酸 磷酸盐 稳定性 抗吸湿性 

分 类 号：TG223[金属学及工艺—铸造]