초록 ▼

A glazed ceramic substrate for use in electric or electronic devices, obtained by forming a glass coating layer directly on a major surface of a ceramic substrate such as an alumina substrate. The glass as the material of the coating layer contains 50-60 Wt % of SiO2, 10-30 Wt % of Al2O3, 15-30 Wt %

A glazed ceramic substrate for use in electric or electronic devices, obtained by forming a glass coating layer directly on a major surface of a ceramic substrate such as an alumina substrate. The glass as the material of the coating layer contains 50-60 Wt % of SiO2, 10-30 Wt % of Al2O3, 15-30 Wt % of CaO and MgO, and 2-6 Wt % of ZrO2 as essential components, optionally with the addition of small amount(s) of at least one of TiO2, BaO, ZnO, PbO, P2O5, B2O3, Na2O and K2O. The coating layer formed of this glass is excellent in its high-temperature stability, so that the glazed ceramic substrate is particularly suitable for use in thermal heads of thermal printing devices.

대표청구항 ▼

A glazed ceramic substrate comprising: a plate-shaped body of a ceramic material; and a glass coating layer formed directly on a major surface of said body, the glass which constitutes said coating layer comprising 50 to 60% by weight of SiO2, 10 to 30% by weight of Al2O3, 15 to 30% by weight of CaO

A glazed ceramic substrate comprising: a plate-shaped body of a ceramic material; and a glass coating layer formed directly on a major surface of said body, the glass which constitutes said coating layer comprising 50 to 60% by weight of SiO2, 10 to 30% by weight of Al2O3, 15 to 30% by weight of CaO and MgO which are jointly used, and 2 to 6% by weight of ZrO2 as essential components thereof.