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Title: Temperature compensated Sr2Al2SiO7 ceramic for microwave applications
Authors: Manu, K M
Tony Joseph
Sebastian, M T
Keywords: Ceramics
Electron microscopy
Microwave dielectric properties
X-ray diffraction
Issue Date: 15-Mar-2012
Publisher: Elsevier
Citation: Materials Chemistry and Physics 133(1):21-23;15 Mar 2012
Abstract: The Sr–Gehlenite (Sr2Al2SiO7) ceramic has been prepared by the conventional solid-state ceramic route.Phase pure Sr2Al2SiO7 (SAS) ceramic sintered at 1525 ◦C for 4 h has εr = 7.2 and Qu × f = 33,000 GHz. The SAS showed large negative f of −37.0 ppm/ ◦C. A low value of f was achieved by preparing SAS–CaTiO3 composite. The composite with 0.04 volume fractions (Vf) CaTiO3 sintered at 1500 ◦C for 4 h showed good microwave dielectric properties: εr = 8.6, Qu × f = 20,400 GHz and f = +8.5 ppm/◦C
Appears in Collections:2012

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