材料期刊网

对不同原始形貌的25Na2O-25CaO-50P2O5玻璃采用表面失重法对水溶解过程进行了分析，试验结果表明：玻璃的溶解分扩散和线性溶解两个阶段，在扩散阶段玻璃的失重与时间的开方呈线性关系，随后玻璃进入线性释放阶段.对玻璃表面形貌的变化的研究表明：玻璃的的原始形貌对玻璃的溶解过程有很大的影响，玻璃表面形貌的变化呈现出与玻璃溶解速度相对应的侵蚀坑的初步形成阶段和侵蚀坑的稳定阶段.

The dissolution process of the 25Na2O-25CaO-50P2O5 glass with different initial surfaces was analyzed with the help of the surface weight loss and the morphology of the glass surface. The experiment of weight loss of the glass shows that the dissolution process of the glass has two stages. the first stage,diffusion stage,at which the weight loss of the glass is proportional to the square root of the dissolution time; the second stage,linear dissolution stage,at which the weight loss of the glass is in direct proportion to the dissolution time. During the dissolution process of the glass,The etched pit forming stage and the etched pit stable stage were observed,and these two stages agree with the two stages of the weight loss. The results also demonstrate that the initial surface of the glass has remarkable effect on the dissolution process of the glass.