Structural and dielectric properties of sol–gel processed Ce-doped <inline-formula><math display="inline" overflow="scroll" xmlns:mml="http://www.w3.org/1998/Math/MathML"><msub><mrow><mstyle><mtext class="textrm" mathvariant="normal">BaTi</mtext></mstyle></mrow><mrow><mn>0</mn><mo class="MathClass-punc">.</mo><mn>9</mn><mn>7</mn></mrow></msub><msub><mrow><mstyle><mtext class="textrm" mathvariant="normal">Y</mtext></mstyle></mrow><mrow><mn>0</mn><mo class="MathClass-punc">.</mo><mn>0</mn><mn>3</mn></mrow></msub><msub><mrow><mstyle><mtext class="textrm" mathvariant="normal">O</mtext></mstyle></mrow><mrow><mn>3</mn></mrow></msub></math></inline-formula> ceramics

Aziz Nfissi; Yahya Ababou; Mounir Belhajji; Salaheddine Sayouri; Taj-dine Lamcharfi

doi:10.1142/S2010135X2150003X

Journal of Advanced Dielectrics, Volume. 11, Issue 1, 2150003(2021)

Structural and dielectric properties of sol–gel processed Ce-doped ${BaTi}_{0.97} Y_{0.03} O_{3}$ ceramics

Aziz Nfissi¹, Yahya Ababou^1、*, Mounir Belhajji¹, Salaheddine Sayouri¹, and Taj-dine Lamcharfi²

Author Affiliations

¹LPAIS, Faculty of Sciences-DM, USMBA, B.P. 1796, Fez-Atlas, Morocco

²LSSC, Faculty of Sciences and Technology, Street Immouzar, B. P. 2202, Fez, Morocco

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Structural and dielectric properties of Ce-doped ${BaTi}_{0.97}$ $Y_{0.03}$ O₃ powders, with the chemical formulation (Ba ${_{1 -}}_{x}$ ${Ce}_{x})$ (Ti( ${_{0.97 -}_{x}}_{/ 4})$ - $Y_{0.03})$ O₃ such as $x$ = 0%, 1%, 3%, 5%, 7% and 9%, produced by the sol–gel method, have been investigated. X-ray diffraction analysis showed that Ce $^{3 +}$ ions incorporated Ba sites until $x$ = 7% indicating that this concentration represents a solubility limit of Ce $^{3 +}$ ions in ${BaTi}_{0.97}$ $Y_{0.03}$ O₃ matrix. Scanning electron microscopy (SEM) analysis showed a decrease in grain size down to the same concentration of 7%. Raman spectroscopy analysis showed the appearance of $A_{1 g}$ mode, which we attributed to the effect of incorporation of Ce $^{3 +}$ and Y $^{3 +}$ in BaTiO₃ matrix. Dielectric measurements revealed that doping with cerium lowers the temperature of permittivity maximum at the ferroelectric-to-paraelectric transition (FPT) of the ${BaTi}_{0.97}$ $Y_{0.03}$ O₃ sample, and reaches a value that should be below $40^{\circ}$ C for $x$ = 9%. Moreover, the phenomenon of dielectric resonance was observed on all Ce-doped samples, which was not the case with other dopants as reported in the literature.Structural and dielectric properties of Ce-doped ${BaTi}_{0.97}$ $Y_{0.03}$ O₃ powders, with the chemical formulation (Ba ${_{1 -}}_{x}$ ${Ce}_{x})$ (Ti( ${_{0.97 -}_{x}}_{/ 4})$ - $Y_{0.03})$ O₃ such as $x$ = 0%, 1%, 3%, 5%, 7% and 9%, produced by the sol–gel method, have been investigated. X-ray diffraction analysis showed that Ce $^{3 +}$ ions incorporated Ba sites until $x$ = 7% indicating that this concentration represents a solubility limit of Ce $^{3 +}$ ions in ${BaTi}_{0.97}$ $Y_{0.03}$ O₃ matrix. Scanning electron microscopy (SEM) analysis showed a decrease in grain size down to the same concentration of 7%. Raman spectroscopy analysis showed the appearance of $A_{1 g}$ mode, which we attributed to the effect of incorporation of Ce $^{3 +}$ and Y $^{3 +}$ in BaTiO₃ matrix. Dielectric measurements revealed that doping with cerium lowers the temperature of permittivity maximum at the ferroelectric-to-paraelectric transition (FPT) of the ${BaTi}_{0.97}$ $Y_{0.03}$ O₃ sample, and reaches a value that should be below $40^{\circ}$ C for $x$ = 9%. Moreover, the phenomenon of dielectric resonance was observed on all Ce-doped samples, which was not the case with other dopants as reported in the literature.

Keywords

Ce-doped BaTi0.97Y0.03O3 dielectric properties FPT temperature resonance sol–gel process

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Aziz Nfissi, Yahya Ababou, Mounir Belhajji, Salaheddine Sayouri, Taj-dine Lamcharfi. Structural and dielectric properties of sol–gel processed Ce-doped ${BaTi}_{0.97} Y_{0.03} O_{3}$ ceramics[J]. Journal of Advanced Dielectrics, 2021, 11(1): 2150003

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Paper Information

Category: Research Articles

Received: Nov. 26, 2020

Accepted: Jan. 19, 2021

Published Online: Nov. 1, 2022

The Author Email: Ababou Yahya (ababouyahya@hotmail.com)

DOI:10.1142/S2010135X2150003X

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