Na_2O-CaO-Al_2O_3-B_2O_3-SiO_2-TiO_2体系分相过程中两相组成的变化  

Changes of two-phase composition in phase separation process of Na_2O-CaO-Al_2O_3-B_2O_3-SiO_2-TiO_2 system

作　　者：高水静[1] 张文丽[1] 侯桂芹[1] 王晓燕[1] 

机构地区：[1]河北理工大学,河北唐山063000

出　　处：《无机盐工业》2011年第7期51-53,共3页Inorganic Chemicals Industry

摘　　要：研究了Na2O-CaO-Al2O3-B2O3-SiO2-TiO2体系分相过程中两相组成的变化。采用扫描电镜测试、能谱分析和X射线衍射等手段对在不同温度下热处理的试样进行测试。实验结果表明,试样发生相分离后,分离成富碱硼相和富硅相,两相的化学组成随分相温度呈现一定的变化。当热处理温度从700℃升高至850℃时,富碱硼相量增加,玻璃分相程度增大。分相温度较低时,富碱硼相中的网调整氧化物只有氧化钙,而网调整氧化物氧化钠集结在富硅相中。随分相温度的升高,氧化钙仍保持在富碱硼相中,而氧化钠则由在富硅相中集聚逐步转移至在富碱硼相中。在分相过程中二氧化钛在分相界面处集聚并析出。The changes of two-phase compositions in the phase separation process of Na2O-CaO-Al2O3-B2O3-SiO2-TiO2 system was studied.Samples treated under different temperatures were tested by using SEM examination,energy spectrum analysis,and X-ray diffraction etc..Results showed that after the phase separation,the system was separated into boron/alkali-rich phase and silicon-rich phase;the chemical compositions of the two phases had a definite relation with the changes of phase separation temperatures.When the heat treatment rising from 700 ℃ to 850 ℃,the amount of boron/alkali-rich phase rised,and the degree of phase separation increased.When phase separation temperature was lower,there was only net adjustment oxide CaO in boron/alkali-rich phase,while net adjustment oxide Na2O concentrated in silicon-rich phase.With the phase separation temperature rising,CaO retained in boron/alkali-rich phase,whereas Na2O took place phase transfer from silicon-rich phase to boron/alkali-rich phase gradually.In the phase separation process,TiO2 concentrated and crystallized on the phase separation interface.

关 键 词：玻璃分相 富碱硼相 组成变化 

分 类 号：TQ127.2[化学工程—无机化工] TQ128