1. Introduction There are many advantages to glassceramics thatare derived from internal nucleation and crystallization of bulk glass arti-cles. Rapid commercial glass forming processes like rol領(lǐng),pressing and casting may be used. A simple reheating process suffices to achieve a fine-grained and uniform microstructure with little or no porosity. The shape of the original glass article is preserved even as a high degree of crystallinity devel-ops. 瞬態(tài)法導(dǎo)熱儀 - TCi