Effects Of (B203, P205) Additives On Microstructural Development And Phase-Transformation Kinetics Of Stoichiometric Cordierite Glasses

The microstructural development and phase-transformation kinetics of stoichiometric cordierite glasses containing B203 and/or P205 additives were highly affected by the microstructural characteristics of the u-cordierite and the type of additives. The addition of B203 tended to cause the formation of u-spherulitic dendrites with thin dendritic arms, which promoted the formation of a-cordierite, either from crystallization of the residual glass or from transformation of u-cordierite. P205 had the opposite effect: Increasing the temperature increased the growth rate of a-cordierite more than that of u-cordierite.