Raman spectroscopy and microwave dielectric properties of Sn substituted SrLa4Ti5O17 ceramics

• Autorzy: Manan A. , Ullah A. , Ahmad A. S.

Identyfikatory

DOI

10.1515/msp-2016-0005

• Języki publikacji: EN

Abstrakty

EN

SrL_a4Ti_5-xSn_xO₁₇ (0 ≤ x ≤ 2) ceramics were fabricated through solid state ceramic route and their microwave dielectric properties were investigated in an attempt to tune their temperature coefficient of resonant frequency to zero. The compositions were sintered to single phase SrL_a4Ti₅ O₁₇ and SrLa_a4Ti_4,5Sn_0,5O₁₇ ceramics at x = 0 and x = 0.5, and SrLa₄Ti_4-xSn_xO₁₇ along with a small amount of La₂Ti₂O₇ at x = 1. The major phase observed at x = 2 was La₂Ti₂O₇ but along with SrL_a4Ti₄SnO₁₇ and SrL_a4Ti₄O₁₅ as the secondary phases. Τ_f decreased from 117 to 23.0 ppm/°C but at the cost of dielectric constant ("r) and quality factor multiplied by resonant frequency (Q_uf_o) which decreased from 65 to 33.6 and 11150 to 4191 GHz, respectively. The optimum microwave dielectric properties, i.e. τ_f = 38.6 ppm/°C, εr = 45.5 and = 7919 GHz, correspond to the SrL_a4Ti_5-xSn_xO₁₇ composition with x = 1.

Słowa kluczowe

EN

ceramics; microwave properties; Raman spectroscopy; SEM

• Wydawca: De Gruyter
• Czasopismo: Materials Science Poland
• Rocznik: 2016
• Tom: Vol. 34, No. 1
• Strony: 1--5
• Opis fizyczny: Bibliogr. 16 poz., rys., tab.

Twórcy

autor

Manan A.

• Department of Physics, University of Science and Technology Bannu, 28100, KPK, Pakistan

autor

Ullah A.

• School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China

autor

Ahmad A. S.

• Department of Physics, University of Science and Technology Bannu, 28100, KPK, Pakistan

Bibliografia

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Uwagi

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę.