In the process of leaching, porous clad of phase separated glass may has tensile stress or compressive stress because of the different copmposition,phase separation condition and cooling rate.

We can get no crack porous glass withcertain strength by adjusting the leaching condition.

Study on process of acid treatment to porous glass;

Study on in-situ leaching stope of deeply soleplate ion-absorbed rare earth;

This paper emphasizes the importance of the monitoring system of stopes of in situ leaching of china's ion absorbed rare earths, introduces the layout principle of the monitor system, supervision method and the analysis and application of its results.