复合晶核剂CaF_2和P_2O_5对黄磷炉渣微晶玻璃晶化行为影响  

Influence of Composite Nucleation Agents CaF_2 and P_2O_5 on Crystallization Behavior of Yellow Phosphorus Furnace Slag Glass-Ceramics

作　　者：尚志标 黄小凤[1] 马丽萍[1] 刘红盼[1] 李国标[1] 陈丹莉[1] 

机构地区：[1]昆明理工大学环境科学与工程学院,昆明650500

出　　处：《人工晶体学报》2016年第12期2838-2844,共7页Journal of Synthetic Crystals

基　　金：昆明理工大学校测试基金(2016M20152207032;2016P2014607009)

摘　　要：以自然冷却黄磷炉渣为主要原料,采用熔融法制备了黄磷炉渣微晶玻璃。利用Fcat Sage6.4热力学软件模拟计算了晶核剂元素F和P的热力学平衡状态;采用差热分析(DTA)、X射线衍射仪(XRD)和扫描电子显微镜(SEM)等研究了以CaF_2和P_2O_5(以KH2PO4的形式引入)作为复合晶核剂对黄磷炉渣微晶玻璃晶化行为及性能的影响。结果表明:复合晶核剂CaF_2+P_2O_5加入量为0.98wt%+0.98wt%时,黄磷炉渣微晶玻璃的析晶活化能E最小,析晶效果最优;当温度达到1350℃时,62.46wt%的F存在于液渣相中,29.36wt%的F以固态纯物质的形式存在,8.18wt%的F以气体状态存在,P元素全部以固态纯物质Ca_3(PO_4)_2的形式存在;随着CaF_2和P_2O_5加入量的增大,主晶相的类型并不发生改变,均为β-硅灰石。The glass-ceramics was fabricated with natural cooling yellow phosphorus furnace slag by melting method. The thermodynamic equilibrium states of fluorine and phosphorus was calculated by FactSage6.4 software package. The effects of CaF2 and P2O5 （ added by KH2 PO4 ） on the crystallization and properties of glass-ceramics were investigated by means of differential thermal analysis, X-ray diffraction and scanning electron microscope. The results show that the activation energy of crystallization was minimum by the addition of 0.98wt% CaF2 and 0.98wt% P2O5. When the temperatures climb up 1350 ℃, 62.46wt% of F exists in slag, 29.36wt% of F exists in pure species, 8.18wt% of F exists in gas, and all P exists in pure species Ca3 （PO4 ）2. The main crystalline phase was wollastonite （β- CaSiO3 ） and it did not change with the increase of CaF2 and P2O5.

关 键 词：黄磷炉渣 CAF2 P2O5 熔融法 微晶玻璃 

分 类 号：TQ171[化学工程—玻璃工业]