DIELECTRIC PORCELAIN MATERIAL

PURPOSE:To reduce a sintering temperature and the cost of an electrode by using, as a main gradient, a mixture composed of MgO.SiO2, and CuO and Mn oxide added thereto, mixing glass therein, and sintering the same. CONSTITUTION:The main gradient is obtained by adding 1-30wt. part of CuO and 0-5wt. of Mn converted into MnO are added to 100wt. part of MgO-SiO2 (MgO/SiO2 mol ratio =1.0-2.0). 5-200wt. part of glass is mixed with respect to 100wt. part of the main gradient and they are sintered and used as a dielectric porcelain material. This CuO stimulates baking at a low temperature, and if it is less than 1wt. part, the baking temperature increases, while if it exceeds 30wt. part, Q decreases. Similarly, if the Mn oxide is 0.5wt. part or less when it is converted into MnO, the effect is weak, while if it is over 5wt. part, the baking temperature increases on the contrary. Further, if the glass is less than 5wt. part, the baking temperature increases, while if it exceeds 200wt. part, the contraction ratio is reduced. It is thus possible to perform baking at 800-1,000 deg.C at which a conductor such as Ag-Pd can be baked.