MgO-BaO-SiO_2-B_2O_3系ガラスの結晶化と表面特性

概要

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Crystallization of glass with a composition of MgO-BaO-SiO_2-B_2O_3 was investigated with DTA, XRD, SEM, surface roughness measurement, Vickers hardness measurement and wear rate. In firing process of the glass, two crystal phases, i.e. 2MgO・B_2O_3 and BaO・2MgO・2SiO_2 were identified. Surface roughness and Vickers hardness of the partially devitrified glass board (glass-ceramics-board) changed with crystallization. The crystallization in the glass became cause of change of surface properties. Surface roughness and Vickers hardness of the glass-ceramics-board were, respectively, 0.16-0.2 μm and 700-800 Hv. The board was superior in a surface smoothness and hardness to any other customary porcelain enamel board (0.3 μm, 300-600 Hv) . The glass-ceramics-board (fired at 880℃ was also superior in wear properties against SUS 420J2 pin. It was found that glass-ceramics-board thus obtaind can be applied to wear resistance material.
社団法人日本セラミックス協会の論文
1992-08-01