(1. 廣西大學(xué) 化學(xué)化工學(xué)院， 南寧530004; 2. 北京科技大學(xué)理化系， 北京100083)
摘 要: 在合成超微細(xì)CaCO3的非穩(wěn)態(tài)體系中，跟蹤測定了Ca(OH) 2懸浮液在有添加劑Na5P3O10存在時的碳化過程。研究表明，在Ca(OH) 2懸浮液中加入(0.380 4～1.522)×10-4mol/L Na5P3O10就足以抑制Ca(OH) 2碳化反應(yīng)的進(jìn)行。 隨著溶液中Na5P3O10濃度的增加，碳化反應(yīng)速度減小。 Ca(OH) 2的碳化過程可分為兩個階段， 即反應(yīng)初期的恒速反應(yīng)階段和反應(yīng)末期的變速反應(yīng)階段。
關(guān)鍵字: 超細(xì)CaCO3； Na5P3O10； 碳化特征
（1. College of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, P.R.China
2. Department of Physicochemistry, University of Science and Technology Beijing, Beijing 100083, P.R.China）
Abstract:The carbonation of Ca(OH) 2 suspension in the presence of Na5P3O10 was measured in situ using conductivity gauge, pH meter, chemical analysis, and the reaction products were analyzed using SEM. The result showed that the carbonation can be divided into two stages, i.e. a constant rate stage and a falling rate stage. The presence of Na5P3O10 can obviously inhabit the Ca(OH) 2carbonation rate and CaCO3 growth rate.
Key words: CaCO3 ultrafine particle；Na5P3O10； carbonation characteristics; Ca(OH) 2
