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Title: Effect of glass fluxing on densification and microwave dielectric properties of LiInSiO4 ceramic
Authors: Annrose, S
Lazer, K A
Manu, K M
Surendran, K P
Sebastian, M T
Keywords: Low sintering temperature
LTCC Applications
Forsterite ceramics
Issue Date: 2013
Publisher: Elsevier
Citation: Journal of Alloys and Compounds 552:83-87;05 Mar 2013
Abstract: A novel microwave substrate ceramic LiInSiO4 (LIS) was synthesized by solid-state ceramic route. LIS ceramic sintered at 1150 degrees C for 4 h showed a densification of 91% with epsilon(r) = 8.2, Q(u) x f = 12,600 GHz and tau(f) = -55 ppm/degrees C. Its thermal conductivity at room temperature (T-c) was found to be 6.0 Wm(-1) K-1 and coefficient of thermal expansion (CTE) was 6.0 ppm/degrees C. For improving the relative density and dielectric properties of LIS ceramic, B2O3 and Lithium Magnesium Zinc Borosilicate (LMZBS) glasses were added. LIS + 1 wt.% LMZBS glass sintered at 1100 degrees C for 4 h showed a relatively good densification of 95% with moderate dielectric properties (epsilon(r) = 8.4, Q(u) x f = 22,000 GHz, tau(f) = -45 ppm/degrees C).
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