| 摘要 |
PURPOSE:To develop glass material used as a bonding material for the glass material at a time of producing a crystallized-glass building material having an irregular-shape cross-section by mixing glass powder having low softening point with glass powder having high softening point at a specified ratio and thereafter molding and sintering the mixture and subjecting it to crystallization heat-treatment. CONSTITUTION:In the case of producing a crystallized-glass building material having an irregular-shape cross-section by assembling the crystallized-glass building material, crystallized- glass plate materials 2 are joined with a joint 5. As a covering material for preventing leak of a joint filler in the joint part, 20-90% glass powder having composition consisting of by weight 67-80% SiO2, 5-10% CaO, 10-20% (Na2O+K2O) and 2-8% MgO and having low softening point is mixed with the residual part consisting of glass powder having composition of 67-80% SiO2, <25% Al2O3 and 5-15% (Na2O+K2O) and having high softening point in a fine particulate state of 200 mesh or below and this mixture is press-molded into a lamellate shape and sintered and thereafter the material subjected to crystallization heat- treatment is used. The crystallized-glass building material is produced by putting this covering material 4 on the joint part of bonding of the recrystallized glass plates and heating it at 600-900 deg.C, bonding and integrating them into one body.
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