| 摘要 |
A glass-ceramic sintered body containing Si, Al, Zn, element of Group 2a and Group 4a of the periodic table, and Boron and Oxygen, as constituent elements, and comprising a glass phase and crystalline phases, wherein the crystalline phase comprises a first crystalline phase of a composite oxide containing at least Si, Al and Ca or Sr, or, Si, Al, Ca and Sr, a second crystalline phase of ZrO2 crystalline and a third crystalline phase of spinel crystalline is presented. The glass-ceramic sintered body has a high dielectric constant of not smaller than 8.5 and have a fracture strength of not smaller than 20 kg/mm2 and preferred as an insulation substrate of a circuit board, a substrate board for mounting an integrated circuit or an electronic compornent part.
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