| 摘要 |
PURPOSE: To obtain a dielectric porcelain compsn. having a high relative dielectric constant εr , a high no-load Q value and a low temp. coefft. τf of resonance frequency and capable of sintering at a low temp. CONSTITUTION: The principal component of this dielectric porcelain compsn. is represented by the compositional formula xBaO-yTiO2 -zNd2 O3 -tSm2 O3 (0.1<=x<=0.2, 0.5<=y<=0.8, 0.01<=z<=0.2, 0<=t<=0.2 and x+y+z+t=1) and consists of barium, titanium, neodymium, samarium and oxygen, and this compsn. contains PbO-ZnO-B2 O3 glass powder, GeO2 , Li2 O and MgO as secondary components. The glass powder content is 1-25wt.% of the amt. of the principal component and the GeO2 , Li2 O and MgO contents are 0.5-10wt.%, 0.04-4wt.% and >0 to <5wt.%, respectively. |
