Phosphate-based geopolymer: Formation mechanism and thermal stability

详细信息    查看全文

• 作者：Yan-Shuai Wang^a ; Jian-Guo Dai^a ; ^{cejgdai@polyu.edu.hk} ; Zhu Ding^b ; Wei-Ting Xu^a
• 关键词：Phosphate ; Geopolymer ; Formation mechanism ; Thermal stability ; Phase transition
• 刊名：Materials Letters
• 出版年：2017
• 出版时间：1 March 2017
• 年：2017
• 卷：190
• 期：Complete
• 页码：209-212
• 全文大小：1136 K
• 卷排序：190

文摘

Phosphate-based geopolymer were formed with various molar ratios of Si, Al and P. Silica fume, metakaolin and monoaluminum phosphate were used as raw materials. The formation mechanisms were analyzed through TG-DTA, XRD and EDS analyses. Formation of SiO2·Al2O3·P2O5·nH2O and AlH3(PO4)2·3H2O leads to strength growth. Changes from AlH6O12P3 to AlPO4 leads to higher strength at elevated temperatures.