Al2O3溶解度的影響
(1. 中南大學(xué) 冶金科學(xué)與工程學(xué)院，長(zhǎng)沙 410083；2 廣西師范大學(xué) 化學(xué)化工學(xué)院，桂林 541004)
摘 要: 采用步冷曲線法測(cè)定Na3AlF6-K3AlF6-AlF3-LiF熔體的初晶溫度，采用旋轉(zhuǎn)剛玉片質(zhì)量損失法測(cè)定Al2O3在Na3AlF6-K3AlF6-AlF3-LiF熔體中的溶解度。結(jié)果表明：當(dāng)LiF添加量在0~4%范圍內(nèi)時(shí)，每添加1% LiF使Na3AlF6-K3AlF6-AlF3熔體的初晶溫度降低3~4.7 ℃，小于Na3AlF6-AlF3熔體中添加LiF后初晶溫度的影響；在0~3%的范圍內(nèi)，每添加1% LiF將使 Al2O3在Na3AlF6-K3AlF6-AlF3熔體中的溶解度降低0.23%~0.55%。
關(guān)鍵字: Al2O3；LiF；Na3AlF6-K3AlF6-AlF3熔體；初晶溫度；溶解度
Al2O3 in Na3AlF6-K3AlF6-AlF3 melts
（1. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;
2. School of Chemistry and Chemical Engineering, Guangxi Normal University, Guilin 541004, China）
Abstract:The liquidus temperatures of Na3AlF6-K3AlF6-AlF3-LiF melts were tested by cooling curve, and the solubilities of Al2O3 in Na3AlF6-K3AlF6-AlF3-LiF melts were determined by the mass loss of rotating sintered corundum disc. The results show that the liquidus temperature decreases by 3−4.7 ℃ with increasing LiF by 1% in the content range of 0−4%, the increment is less than that in Na3AlF6 melts. The solubility of Al2O3 in Na3AlF6-K3AlF6-AlF3 melts decreases by 0.23%−0.55% with increasing LiF by 1% in the content range of 0−3%.
Key words: Al2O3; LiF; K3AlF6-K3AlF6-AlF3 melt; liquidus temperature; solubility
