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Raman spectroscopy and microwave dielectric properties of Sn substituted SrLa4Ti5O17 ceramics

Materials Science-Poland
Volume 34 (2016): Issue 1 (March 2016)
By:
Open Access
|Apr 2016

Figures & Tables

Fig. 1

XRD patterns of SrLa4Ti5−xSnxO17 (0 ≤ x ≤ 2) ceramics, showing the formation of SrLa4Ti5O17, SrLa4Ti4.5Sn0.5O17 at x = 0 and 0.5, SrLa4Ti4Sn1O17 along with La2Ti2O7 at x = 1 and La2Ti2O7 and SrLa4Ti4O15 along with a few diminishing peaks due to SrLa4Ti4SnO17 at x = 2.
XRD patterns of SrLa4Ti5−xSnxO17 (0 ≤ x ≤ 2) ceramics, showing the formation of SrLa4Ti5O17, SrLa4Ti4.5Sn0.5O17 at x = 0 and 0.5, SrLa4Ti4Sn1O17 along with La2Ti2O7 at x = 1 and La2Ti2O7 and SrLa4Ti4O15 along with a few diminishing peaks due to SrLa4Ti4SnO17 at x = 2.

Fig. 2.

SEIs recorded from thermally etched, gold-coated sintered SrLa4Ti5−xSnxO17 compositions showing (a) elongated grains at x = 0, (b) elongated grains at x = 0.5, (c) elongated grains at x = 1, (d) cuboidal shaped grains at x = 2.
SEIs recorded from thermally etched, gold-coated sintered SrLa4Ti5−xSnxO17 compositions showing (a) elongated grains at x = 0, (b) elongated grains at x = 0.5, (c) elongated grains at x = 1, (d) cuboidal shaped grains at x = 2.

Fig 3.

Raman spectra recorded at room temperature for SrLa4Ti5−xSnxO17 (0 ≤ x ≤ 2) compositions.
Raman spectra recorded at room temperature for SrLa4Ti5−xSnxO17 (0 ≤ x ≤ 2) compositions.

Fig. 4

Variation in εr and τf versus Sn4+ content (x) for SrLa4Ti5−xSnxO17 (0 ≤ x ≤ 2) compositions sintered at their optimum sintering temperatures.
Variation in εr and τf versus Sn4+ content (x) for SrLa4Ti5−xSnxO17 (0 ≤ x ≤ 2) compositions sintered at their optimum sintering temperatures.

Fig. 5

Variation in Qufo versus Sn4+ content (x) for SrLa4Ti5−xSnxO17 (0 ≤ x ≤ 2) compositions sintered at their optimum sintering temperatures.
Variation in Qufo versus Sn4+ content (x) for SrLa4Ti5−xSnxO17 (0 ≤ x ≤ 2) compositions sintered at their optimum sintering temperatures.

Preparation conditions, apparent densities and microwave dielectric properties of SrLa4Ti5−xSnxO17 (0 ≤ x ≤ 2)_

xCT[°C]ST[°C]ρexp[g/cm3]εrQufo [GHz]τf [ppm/°C]
01250/6h1500/4h5.4165.011150+118
0.51300/6h1600/4h5.6356.29450+54.5
11300/6h1625/4h5.6048.28278+35.6
21300/6h1625/4h5.7533.84345+21.0

Elemental composition (in moles) calculated from semi-quantitative EDS data of the grains labelled in Fig_ 2_

GrainSrLaTiSn
A14.124.260
B14.104.200.6
C2.9510.179.361
D1.3513.9315.091
DOI: https://doi.org/10.1515/msp-2016-0005 | Journal eISSN: 2083-134X | Journal ISSN: 2083-1331
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Language: English
Page range: 1 - 5
Submitted on: Aug 24, 2014
Accepted on: Nov 11, 2015
Published on: Apr 27, 2016
Published by: Wroclaw University of Science and Technology
In partnership with: Paradigm Publishing Services
Publication frequency: 4 times per year
Keywords:
ceramics,
microwave properties,
Raman spectroscopy,
SEM
Related subjects:
Materials sciences,
Materials sciences, other,
Nanomaterials,
Functional and smart materials,
Materials characterization and properties

© 2016 Abdul Manan, Atta Ullah, Arbab Safeer Ahmad, published by Wroclaw University of Science and Technology
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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