Highly concentrated suspensions of nontransparent fused quartz and materials based on them

Conclusions

On the basis of nontransparent quartz glass, using the wet milling method in a porcelain mill and uralit balls, we obtained casting suspensions with volume concentrations of solid phase equal to 70–73%. By means of stabilization with mechanical gravitation stirring we attained a sharp reduction in the slip's viscosity, and increases in density and strength.

We demonstrated the considerable influence of the concentration of the suspension during wet milling on the porosity and strength of the cast. A technology was developed with which, on the basis of the suspension of nontransparent quartz glass, we can obtain green articles with a porosity of 13.3–15% and a bending strength of up to 2 MPa. Using this slip we prepared samples of unfired ceramic with σ_bend up to 30 MPa which is comparable with the strength of fired materials.