Effect of B2O3 addition on the sintering temperature and microwave dielectric properties of Zn2SiO4 ceramics

✍ Scribed by Jin-Seong Kim; Myung-Eun Song; Mi-Ri Joung; Jae-Hong Choi; Sahn Nahm; Sin-Il Gu; Jong-Hoo Paik; Byung-Hyun Choi

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 702 KB
• Volume: 30
• Category: Article
• ISSN: 0955-2219
• DOI: 10.1016/j.jeurceramsoc.2009.04.028

✦ Synopsis

B 2 O 3 (25.0 mol%) was added to Zn 2-x SiO 4-x ceramics (0.0 ≤ x ≤ 0.5) to decrease the sintering temperature. Specimens with 0.0 ≤ x ≤ 0.3 sintered at 900 • C were well sintered with a high density due to the formation of a B 2 O 3 or B 2 O 3 -SiO 2 liquid phase. The Q × f value of the Zn 2 SiO 4 ceramic was relatively low, 32,000 GHz, most likely due to the presence of a ZnO second phase. A maximum Q × f value of 70,000 GHz was obtained for the specimens with x = 0.2-0.3, and their ε r and τ f values were approximately 6.0 and -21.9 ppm/ • C, respectively. Ag metal did not interact with the 25.0 mol% B 2 O 3 -added Zn 1.8 SiO 3.8 ceramic, indicating that Zn 2-x SiO 4-x ceramics containing B 2 O 3 are a good candidate materials for low temperature co-fired ceramic devices.