Effect of Boron Oxide Addition on Microstructure and Mechanical Properties of Slip Cast Fused Silica

Boron Oxide (B2O3) was doped in fused silica using slip casting technique. Effects of addition of B2O3 on mechanical as well as dielectric properties along with microstructure were studied. It was observed that B2O3 acts as devitrification inhibitor by reducing the formation of cristobalite content during sintering of fused silica. Mechanical properties were improved by addition of B2O3. Density and flexural strength with (3% by weight) addition of B2O3 was 1.89 g/cc and 52MPa respectively.