自溃散——提高水玻璃砂溃散性的新机制  

Self collapsibility——A New Method for Improving the Collapsibility of Sodium silicate Sand

作　　者：孙万良[1,2] 姜青河[1,2] 韩建德 王维倜[1,2] 罗吉荣 

机构地区：[1]山东工业大学 [2]华中理工大学

出　　处：《铸造》1997年第9期13-17,共5页Foundry

摘　　要：通过试验发现价廉易得的无机物Ｂ，可使水玻璃砂在常温、常湿状态下实现自我溃散；详细分析了影响水玻璃砂自溃性的因素；运用大型显微镜和电子扫描显微镜（ＳＥＭ）研究发现，无机物Ｂ焙烧后在放置过程中体积膨胀，使砂粒间的水玻璃粘结桥脱落或断裂。A cheap inorganic B has been found to make sodium silicate sand self collapsible at ambient shop floor temperature and humidity,the factors affecting the self collapsibility of sodium silicate sand were studied in detail.By using large microscope and SEM,it was shown that expansion of added inorganic B after baking makes the binder bridges of silicate sand to be disrupted,thus reducing the retained strength.

关 键 词：水玻璃砂 无机物B 自我溃散 溃散性 溃散剂 

分 类 号：TG221.1[金属学及工艺—铸造]