| 摘要 |
PURPOSE:To obtain sintered glass or sintered glass ceramic suitable as a material for multilayer printed circuit board, by forming a powdery glass composition composed mainly of SiO2, Al2O3 and MgO or a mixture of the composition and specific aggregate and calcining the formed product. CONSTITUTION:A powdery glass composition consisting of 45-60(wt)% SiO2, 10-25% Al2O3 and 25-40% MgO is mixed with <=5% nucleation agent composed of one or more substances selected from TiO2, ZrO2, SnO2, P2O5, ZnO, As2O3, MoO3, etc. The obtained powdery mixture is optionally mixed with 5-30pts.wt. (based on 100pts. of the mixture) of at least one kind of aggregate selected from silica, cordierite, forsterite, steatite, anorthite and celsian. The produced mixture is formed and calcined at <=1,000 deg.C to obtain sintered glass or sintered glass ceramic having dense texture and low dielectric constant and suitable as a material for multilayer printed circuit board. |
