MgO—B_2O_3—SiO_2—Al_2O_3—CaO中含硼组分析晶动力学  

STUDY ON CRYSTALLIZATION KINETICS OF COMPONENT CONTAINING BORON INMgO-B_2O_3-SiO_2-Al_2O_3-CaO SLAG

作　　者：张培新[1] 隋智通[1] 罗冬梅[1] 马荣骏[1] 

机构地区：[1]东北大学,长沙矿冶研究院

出　　处：《材料研究学报》1995年第1期66-70,共5页Chinese Journal of Materials Research

基　　金：国家自然科学基金

摘　　要：根据玻璃形成动力学理论，计算了ＭｇＯ－Ｂ２Ｏ３－ＳｉＯ２－Ａｌ２Ｏ３－ＣａＯ渣系中含硼组分２ＭｇＯ·Ｂ２Ｏ３的成核速度（Ｉ）和晶体长大速度（Ｕ），获得了２ＭｇＯ·Ｂ２Ｏ３晶体形成的最佳温度．采用化学分析、Ｘ射线衍射分析（ＸＲＤ）和差热分析（ＤＴＡ）等方法研究了热处理温度对ＭｇＯ—Ｂ２Ｏ３—ＳｉＯ２—Ａｌ２Ｏ３—ＣａＯ渣系硼提取率的影响．结果表明：硼渣最佳热处理温度与２ＭｇＯ·Ｂ２Ｏ３晶体形成最佳温度一致。The efficiency of extractive boron(EEB)is directly related to the precipitating characteristics of the B component in the slags.The EEB is high if the B comPOnent existed in the crystal form of 2MgO·B2P3,otherwise the EEB is low in the form of amorphous phase. Whether the B comPOnent in the slags can be Precipitated in the form of 2MgO·B2O3, which is the main factor affecting the EEB, so the nucleation rates and the crystul growth rates of 2MgO·B2O3 crystal in the slag MgO - B2O3 - SiO2 - Al2O3 - CaO were calculated with glass formation kinetics through that the optimum forming temperature of 2MgO· B2O3 crystal was obtained. The effects of temperature of heat treatment on the EEB were investigated by chemical analysis, X- ray diffraction(XRD) and differential thermal analysis(DTA).The result showed that the favourable temperature of heat treatment for MgO - B2O3 - SiO2 - Al2O3 - CaO slag was at 1000 1200 ℃, in which the optimum temperature was 1100℃.It was found that the optimum temperature of heat treatment of the slag is in good againment with the optimum forming temperature of 2MgO· B2O3 crystal.

关 键 词：硼渣 热处理温度 成核速度 晶体长大速度 

分 类 号：TQ171.1[化学工程—玻璃工业] O781[化学工程—硅酸盐工业]