| 摘要 |
PURPOSE:To obtain a dielectric porcelain compound of high quality characterized by high level of dielectric constant, insulation resistance, and dielectric breakdown voltage by adding 0.1 to 10.0 weight part of Nb2O5 as a subcomponent to a compound which is primarily composed of SrO, CaO, TiO2 and ZrO. CONSTITUTION:In a compound whose primary components fall in the region of mole ratio in which x, y, z in an expression I are encircled by (a) (x=0.27, y=0.21, z=0.52), (b) (x=0.31, y=0.20, z=0.49), (c) (x=0.33, y=0.16, z=0.51), (d) (x=0.29, y=0.17, z=0.54) respectively, 0.1 to 10.0 weight part of Nb2O5 is contained as a subcomponent. These materials are mixed together for example in a wet process and after drying, they are Calcined for 2hours at 1100degrees centigrade. After being ground into powder and then molded the material is put in a mortar that is made of high purity alumina with ZrO2 powder spread on the bottom and then is calcined for 2hours at 1380degrees Centigrade, thus a dielectric porcelain being obtained. Thereby a dielectric porcelain compound of high quality which is characterized by high level of dielectric constant, insulation resistance and dielectric breakdown voltage and by a small coefficient of temperature can be obtained. |
