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Crystallization of glass with a composition of MgO-BaO-SiO2-B2O3 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⋅B2O3 and BaO⋅2MgO⋅2SiO2 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, 0.16-0.2μm and 700-800Hv. The board was superior in a surface smoothness and hardness to any other customary porcelain enamel board (0.3μm, 300-600Hv). The glass-ceramics-board (fired at 880°C) 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.

nihon seramikkusu kyoukai gakujyutsu rombunshi/nippon seramikkusu kyōkai gakujutsu rombunshi

Relationship between Crystallization and Surface Characteristics in MgO-BaO-SiO&lt;sub&gt;2&lt;/sub&gt;-B&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;3&lt;/sub&gt; Glass