Influence of Sm substitution on the phase, microstructure and microwave dielectric properties of SrLa4Ti5O17
Influence of Sm substitution on the phase, microstructure and microwave dielectric properties of SrLa4Ti5O17
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DOI：
10.1007/s10854-011-0372-3
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发表时间：
2011-04
期刊：
影响因子：
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通讯作者：
A. Manan;Y. Iqbal
中科院分区：
文献类型：
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作者：
A. Manan;Y. Iqbal
New dielectric ceramics in the SrLa4−xSmxTi5O17(0 ≤ x ≤ 4) composition series were prepared through a solid state mixed oxide route to investigate the effect of Sm+3substitution for La+3on the phase, microstructure and microwave dielectric properties. At x = 0–3, all the compositions formed single phase ceramics within the detection limit of in-house X-ray diffraction when sintered in the temperature range 1500–1580 °C. At x = 4, a mixture of Sm2Ti2O7and SrTiO3formed. The maximum Sm+3-containing single phase ceramics, SrLaSm3Ti5O17, exhibited relative permittivity (εr) = 42.6, temperature coefficient of resonant frequency (τf) = −96 ppm/oC and quality factor (Qufo) = 7332 GHz. An analysis of results presented here indicates that SrLa4−xSmxTi5O17ceramics, exhibitingτf~ 0 and εr~ 53 could be achieved at x ~ 1.4 but at the cost of decrease inQufo.
