(1. 河北科技大學(xué) 材料科學(xué)與工程學(xué)院，石家莊 050018；
2. 河北科技大學(xué) 河北省材料近凈成形重點(diǎn)實(shí)驗(yàn)室，石家莊 050018)
摘 要: 采用分析純?cè)噭┰?500 ℃下保溫2 h合成γ-2CaO？SiO2熟料，并通過(guò)溶出實(shí)驗(yàn)和XRD等手段研究降溫速度對(duì)其分解性能和晶體結(jié)構(gòu)的影響。結(jié)果表明：隨著降溫速度的加快，制得的γ-2CaO？SiO2的分解性能升高；隨著分解時(shí)間的延長(zhǎng)，降溫速度對(duì)分解性能的影響更加明顯；晶胞體積隨降溫速度的加快而增大，不同降溫速度下制得γ-2CaO？SiO2均具有(130)晶面的擇優(yōu)取向；隨著降溫速度的加快，(130)晶面的擇優(yōu)取向沒(méi)有變化；晶胞體積的增大促進(jìn)γ-2CaO？SiO2的分解。
關(guān)鍵字: γ-2CaO？SiO2；降溫速度；分解性能；晶體結(jié)構(gòu)
（1. School of Material Science and Engineering, Hebei University of Science and Technology,
Shijiazhuang 050018, China;
2. Hebei Key Laboratory of Material Near-net Forming Technology, Hebei University of Science and Technology, Shijiazhuang 050018, China）
Abstract:γ-2CaO？SiO2 clinkers were synthesized by analytically pure reactants at 1500 ℃ for 2 h. The effect of cooling rate on decomposition property and crystal structure of γ-2CaO？SiO2 was investigated by leaching experiment and XRD method. The results show that the decomposition property of γ-2CaO？SiO2 increases with the cooling rate speeding up. The influence of cooling rate on decomposition property of γ-2CaO？SiO2 prefers more obviously with the leaching time prolonging. The crystal cell volume increases with the cooling rate speeding up. The clinkers under different cooling rate has preferred orientation on crystal face (130). With the increase of the cooling rate, the preferred orientation on crystal face (130) is constant. The increase of crystal cell volume promotes the decomposition of γ-2CaO？SiO2.
Key words: γ-2CaO？SiO2; cooling rate; decomposition property; crystal structure
