| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a low dielectric constant ceramic composition which is capable of being sintered by low temperature sintering in which a conductive body having high electric conductivity such as Ag, Au or Cu is simultaneously sintered and which has characteristic excellent in high frequency band. <P>SOLUTION: The ceramic composition consists of 40-65% Al<SB>2</SB>O<SB>3</SB>, 15-35% one of SiO<SB>2</SB>and B<SB>2</SB>O<SB>3</SB>or in total of SiO<SB>2</SB>and B<SB>2</SB>O<SB>3</SB>, 10-20% CaO, 0.1-14% ZnO, 0-2% MnO and 0-2% R<SB>2</SB>O (where R expresses one or more kinds of Li, Na and K) by mol expressed in terms of oxide. The ceramic composition is prepared by further incorporating 0.1-2% Ln<SB>2</SB>O<SB>3</SB>(Ln expresses one or more kinds of rare earth elements such as Y, La and Nd). The method of manufacturing the ceramic composition is performed by mixing the powder of raw materials, calcining the mixture and pulverizing the calcined mixture to make powder, adding a binder or the like to the powder and kneading and molding into a required shape, firing at 800-1,000°C or vitrifying the composition except Al<SB>2</SB>O<SB>3</SB>and mixing Al<SB>2</SB>O<SB>3</SB>with the glass powder and firing at 800-920°C. <P>COPYRIGHT: (C)2004,JPO |
