摘要
在以前做过的有关工作基础上用￣（２９）Ｓｉ－ＮＭＲ，ＦＴ－ＩＲ和ＴＭＳ－ＧＣ等方法进一步研究了由水热合成ＣＳＨ脱水形成β－Ｃ＿２Ｓ的过程。结果表明ＣＳＨ解聚过程分三步：加热至３００℃高聚物解聚主要变成双聚体；３００～５００℃为双聚体至五聚体；５００～１０００℃低聚物量降低，而代表β－Ｃ＿２Ｓ的孤立［ＳｉＯ＿４］￣（４－）四面体量逐步增加成为主要组份。
Based on the previous related study,formation process of C_2S from hydrothermally synthesizedCSH using ￣(29)Si-NMR,FT-IR and TMS-GC was further studied. The results show that the depolymeriza-tion process of silicate anions in CSH can be divided into three steps: up to 300℃, the high polymers depolymer-ized to dimer mainly,in 300～500℃ the main products formed are dimers together with trimer,tetramer andpentamer;in 500～1000℃,amount of mixture of silicate anions with short chain decreases;whereas amount ofmonomer(SiO_4)￣(4-) tetrahedra which is symbolic of β-C_2S increases gradually to be the dominant constituent.
出处
《硅酸盐学报》
EI
CAS
CSCD
北大核心
1994年第6期566-572,共7页
Journal of The Chinese Ceramic Society
基金
国家自然科学基金
关键词
水热合成
水化
硅酸钙
活性
硅酸二钙
CSH
C2S
hydrothermally synthesis,calcium silicate hydrate,structure of silicate anions,active dicalcium silicate
