| abstract |
A ceramic composition comprising 55-70 vol % of a borosilicate glass consisting of 65-88 wt % of SiO2, 5-25 wt % of B2O3, 1-5 wt % of one or more of Li2O, K2O and Na2O, and 0-5 wt % of Al2O3, 5-30 vol % of alumina as filler, 5-35 vol % of cordierite and 0-20 vol % of quartz glass is provided for a ceramic circuit board for an electronic device such as an electronic computer. |