Effects of TiO2 phases on the structural and dielectric properties of sintered BaTiO3 + x% mol Fe2O3 ceramics

R. Bounouioua; T. Bezzi; S.E. Berama; B. Boudine; M.T. Benlahrache

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자료유형: 학술저널

저자정보: R. Bounouioua T. Bezzi S.E. Berama B. Boudine M.T. Benlahrache

저널정보: 한양대학교 세라믹공정연구센터 Journal of Ceramic Processing Research Journal of Ceramic Processing Research 제20권 제2호

발행연도: 2019.1

수록면: 187 - 197 (11page)

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The objective of this paper is to study the influence of TiO2 phases on the structural and dielectric properties of the BaTiO3ceramics containing different amounts of Fe2O3. The pure BaTiO3 ceramics was prepared by a solid state reaction betweenBaCO3 and both of TiO2 phases, anatase (A) and rutile (R), respectively. We prepared the mixtures by stoichiometric way,which were calcined at 1100 oC during 2hrs. The formations of perovskites structures ABO3 were confirmed by X-raysdiffraction analysis. While the ceramics mixture with (1-x) BaTiO3+ x % Fe2O3 (where x = 1, 2, 5 and 7 wt %) compositionswere prepared by the wet milling. Afterwards, the different pellets were fabricated by uniaxial compression and sintered atdifferent temperatures (1300, 1350 and 1400 oC). The obtained results show an increase in the tetragonality due to the dopingby Fe3+, consequencely an increase in the relative permittivity of samples prepared from TiO2(R) with both of Fe2O3 additionand sintering temperature. On the other hand, for the samples prepared from TiO2 (A) the obtained results show a decreasein both relative density and tetragonality with both of Fe2O3 addition and sintering temperature, as a consequence we get adecrease in the relative permittivity compared with pure BTA.

참고문헌 (23)

참고문헌 신청

윤당혁 / 2006 / Tetragonality of barium titanate powder for a ceramic capacitor application / Journal of Ceramic Processing Research 7(4):343~354

A. Graff / 2005 / J. E. Cer. Soc 25:2201~2206

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