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 Na2 O - CaO - Al2 O3 - B2 O3 -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.
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