Preparation and characterization of calcium aluminate by chemical synthesis  

作　　者：Feng Chen Yanruo Hong Jialin Sun Jinglong Bu 

机构地区：[1]Materials Science and Engineering School, University of Science and Technology Beijing, Beijing 100083, China [2]Hebei Physical and Engineering Institute, Tangshan 063009, China

出　　处：《Journal of University of Science and Technology Beijing》2006年第1期82-86,共5页北京科技大学学报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China Key Program (No. 50332010);the National Natural Science Foundation of China (No. 50172007)

摘　　要：Saturated Ca（OH）2 and AlCl3 solutions were used to synthesize calcium aluminate hydrate precipitates at room temperature; high purity calcium aluminate powders with stable phases were made by calcination of the precursors at a temperature as low as 1100℃. PSD and BET analysis revealed the particles with sizes ranging from submicrometer to several micrometers and with a specific area of 13 m^2/g. The measurement of hydraulic exotherm revealed that the exothennal rate is in peak for about 2 h. The exothermal quantities are 449.24 J/g at 12 h and 488.38 J/g at 24 h. Its strength development is quick and the 1 day curing strength is almost equal to 100% of the 3 days curing strength in the mortar test.Saturated Ca（OH）2 and AlCl3 solutions were used to synthesize calcium aluminate hydrate precipitates at room temperature; high purity calcium aluminate powders with stable phases were made by calcination of the precursors at a temperature as low as 1100℃. PSD and BET analysis revealed the particles with sizes ranging from submicrometer to several micrometers and with a specific area of 13 m^2/g. The measurement of hydraulic exotherm revealed that the exothennal rate is in peak for about 2 h. The exothermal quantities are 449.24 J/g at 12 h and 488.38 J/g at 24 h. Its strength development is quick and the 1 day curing strength is almost equal to 100% of the 3 days curing strength in the mortar test.

关 键 词：calcium aluminate PREPARATION CHARACTERIZATION chemical synthesis 

分 类 号：O614.231[理学—无机化学]