Oxyfluoride glass-silica ceramic composite for low temperature co-fired ceramics

✍ Scribed by Rui Wang; Ji Zhou; Hongjie Zhao; Bo Li; Longtu Li

• Publisher: Elsevier Science
• Year: 2008
• Tongue: English
• Weight: 600 KB
• Volume: 28
• Category: Article
• ISSN: 0955-2219
• DOI: 10.1016/j.jeurceramsoc.2008.05.010

✦ Synopsis

Glass/ceramic composite materials based on CaF 2 -AlF 3 -SiO 2 oxyfluoride glass and silica ceramic filler were prepared. The sintering behavior, phase composition and dielectric property of oxyfluoride glass/silica ceramic composites, as well as its compatibility with Ag electrode, were investigated. The results show that the glass/ceramic composite system can be sintered at 825 • C. When the amount of SiO 2 increased from 0 to 20 wt.%, the shrinkage decreased from 17.0 to 14.5%, and the dielectric constant decreased from 5.9 to 5.4, while the thermal expansion coefficient (20-200 • C) increased from 6.0 to 10.1 ppm/ • C. The sintered samples had low dielectric losses less than 0.002 and high flexural strengths. This novel glass/ceramic composite system exhibits good sintering compatibility with silver paste, which makes it a promising candidate for low temperature co-fired ceramic application.