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http://purl.org/purl/1450
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Title: | Microwave dielectric properties of MO -La2O3-TiO2 (M = Ca, Sr, Ba) ceramics |
Authors: | Isuhak, Naseembeevi Jawahar Narayana Iyer, Santha Mailadil, Thomas Sebastian |
Keywords: | Microwave dielectric properties |
Issue Date: | Dec-2002 |
Publisher: | Materials Reserach Society |
Abstract: | Single-phase polycrystalline ceramics in the MO-La2O3-Ti02 (M = Ca, Sr, Ba)
system, such as cation-deficient hexagonal perovskites CaLa4Ti4O15, SrLa4Ti4O15,
BaLa4Ti4O15, and Ca2La4Ti5O18 and the orthorhombic phases CaLa4Ti5O17 and
CaLa8Ti9O31, were prepared through the solid-state ceramic route. The phases
and structure of the ceramics were analyzed through x-ray diffraction and scanning
electron microscopy. The microwave dielectric properties of the ceramics were studied
using a network analyzer. The investigated ceramics show high Er in the range 42 to
54, high quality factors with Q x f in the range 16,222 to 50,215 GHz, and low Tf in
the range -25 to +6 ppm3/°C. These high dielectric constant materials with high Q x f
up to 50,215 GHz are suitable for applications where narrow bandwidth and extremely
low insertion loss is necessary, especially at frequencies around 1.9 GHz |
URI: | http://dyuthi.cusat.ac.in/purl/1450 |
Appears in Collections: | Publications
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