| 摘要 |
PURPOSE: To obtain a glass-ceramic dielectric material having a high relative permittivity and a small dielectric loss at frequency in a microwave region, capable of using silver or copper as an electrode or conductor material because the dielectric material can be fired at a low temp., having high mechanical strength and satisfactory heat resistance and suitable for use as a microwave circuit part material. CONSTITUTION: This glass-ceramic dielectric material consists of 40-90wt.% glass powder and 60-10wt.% ceramic powder. The glass powder consists of, by weight, 10-35% SiO2 , 5-35% Ln2 O3 (lanthanoid oxide), 15-50% TiO2 , 3-45% RO (alkaline earth metal oxide) 1-30% PbO and 0-25% ZrO2 . A ceramic material having a relative permittivity of >=9 and a dielectric loss of <=20×10<-4> at 1GHz frequency is preferably used as the ceramic powder. |
