Microstructural Development On Crystallizing Hot-Pressed Pellets Of Cordierite Melt-Derived Glass Containing B203 And P205

Comparing the crystallization mechanism of stoichiometric and B203 and P205 containing glass reveals that the additives extend the gap between the glass transition and crystallization temperatures and suppress formation of u cordierite while promoting direct crystallization of cordierite. Detailed TEM analysis of nucleation and growth of crystals in hot-pressed pellets of B203/P205-containing glass particles shows that nucleation occurs on unidentified heterogenous nuclei at the sites of the previous particle surfaces.