La2O3对水玻璃型壳性能影响的研究

在水玻璃石英壳涂料中加入稀土氧化物Ｌａ２Ｏ３，研究Ｌａ２Ｏ３对壳型性能的影响。研究结果表明，Ｌａ２Ｏ３能显著提高型壳的高温强度，减挠度。壳型的残留强度提高较小，担对型壳的透气性影响不大。

On the Effects of La2O3 on the Properties of Sodium Silicate Ceramic Shells

In this paper,an examination has been performed on the properties of the sodium silicate ceramic shells with a small addition of rare earth oxides La2O3. The results have shown that having little influence on the permeability of the shell,this addition significantly improves its high-temperature strength, reduces its deformation and scantily raises its residual strength. By adding in small amount of La2O3,the consumption of the raw material can be decreased,and the productivity increased,therefore,its prospects of application looks bright.