Stabilization of cubic structure in Mn-doped hafnia

Ling Gao; Lian Zhou; Jianqing Feng; Lifeng Bai; Chengshan Li; Zhongyuan Liu; Jean Louis Soubeyroux; Yafeng Lu

doi:10.1016/j.ceramint.2011.10.082

Stabilization of cubic structure in Mn-doped hafnia

Ling Gao, Lian Zhou, Jianqing Feng, Lifeng Bai, Chengshan Li, Zhongyuan Liu, Jean Louis Soubeyroux, Yafeng Lu

Research output: Contribution to journal › Article › peer-review

33 Scopus citations

Abstract

The compounds Hf _1-xMn _xO _2-δ (x = 0-0.5) have been synthesized by conventional solid state reaction method in Ar. Rietveld analysis of X-ray diffraction data has shown that the Mn-doped HfO ₂ undergoes a structural transformation from monoclinic to cubic phases, which is significantly dependent on the Mn content under current synthesis conditions. The stabilized cubic structure by multivalent Mn ion doping can transform to the monoclinic structure when annealed at high temperature in air. Transmission electron microscopy and electron diffraction investigations have also confirmed the existence of the high-temperature cubic structure. A mechanism of stabilizing the high-temperature cubic phase in the Hf _1-xMn _xO _2-δ system has been analyzed based on considerations of manganese substitution effect for hafnium ions and oxygen vacancy formation.

Original language	English
Pages (from-to)	2305-2311
Number of pages	7
Journal	Ceramics International
Volume	38
Issue number	3
DOIs	https://doi.org/10.1016/j.ceramint.2011.10.082
State	Published - Apr 2012
Externally published	Yes

Keywords

Microstructure
Oxides
Phase transformations

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10.1016/j.ceramint.2011.10.082

Cite this

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title = "Stabilization of cubic structure in Mn-doped hafnia",

abstract = "The compounds Hf 1-xMn xO 2-δ (x = 0-0.5) have been synthesized by conventional solid state reaction method in Ar. Rietveld analysis of X-ray diffraction data has shown that the Mn-doped HfO 2 undergoes a structural transformation from monoclinic to cubic phases, which is significantly dependent on the Mn content under current synthesis conditions. The stabilized cubic structure by multivalent Mn ion doping can transform to the monoclinic structure when annealed at high temperature in air. Transmission electron microscopy and electron diffraction investigations have also confirmed the existence of the high-temperature cubic structure. A mechanism of stabilizing the high-temperature cubic phase in the Hf 1-xMn xO 2-δ system has been analyzed based on considerations of manganese substitution effect for hafnium ions and oxygen vacancy formation.",

keywords = "Microstructure, Oxides, Phase transformations",

author = "Ling Gao and Lian Zhou and Jianqing Feng and Lifeng Bai and Chengshan Li and Zhongyuan Liu and Soubeyroux, {Jean Louis} and Yafeng Lu",

year = "2012",

month = apr,

doi = "10.1016/j.ceramint.2011.10.082",

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volume = "38",

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journal = "Ceramics International",

issn = "0272-8842",

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TY - JOUR

T1 - Stabilization of cubic structure in Mn-doped hafnia

AU - Gao, Ling

AU - Zhou, Lian

AU - Feng, Jianqing

AU - Bai, Lifeng

AU - Li, Chengshan

AU - Liu, Zhongyuan

AU - Soubeyroux, Jean Louis

AU - Lu, Yafeng

PY - 2012/4

Y1 - 2012/4

N2 - The compounds Hf 1-xMn xO 2-δ (x = 0-0.5) have been synthesized by conventional solid state reaction method in Ar. Rietveld analysis of X-ray diffraction data has shown that the Mn-doped HfO 2 undergoes a structural transformation from monoclinic to cubic phases, which is significantly dependent on the Mn content under current synthesis conditions. The stabilized cubic structure by multivalent Mn ion doping can transform to the monoclinic structure when annealed at high temperature in air. Transmission electron microscopy and electron diffraction investigations have also confirmed the existence of the high-temperature cubic structure. A mechanism of stabilizing the high-temperature cubic phase in the Hf 1-xMn xO 2-δ system has been analyzed based on considerations of manganese substitution effect for hafnium ions and oxygen vacancy formation.

AB - The compounds Hf 1-xMn xO 2-δ (x = 0-0.5) have been synthesized by conventional solid state reaction method in Ar. Rietveld analysis of X-ray diffraction data has shown that the Mn-doped HfO 2 undergoes a structural transformation from monoclinic to cubic phases, which is significantly dependent on the Mn content under current synthesis conditions. The stabilized cubic structure by multivalent Mn ion doping can transform to the monoclinic structure when annealed at high temperature in air. Transmission electron microscopy and electron diffraction investigations have also confirmed the existence of the high-temperature cubic structure. A mechanism of stabilizing the high-temperature cubic phase in the Hf 1-xMn xO 2-δ system has been analyzed based on considerations of manganese substitution effect for hafnium ions and oxygen vacancy formation.

KW - Microstructure

KW - Oxides

KW - Phase transformations

UR - http://www.scopus.com/inward/record.url?scp=84857059653&partnerID=8YFLogxK

U2 - 10.1016/j.ceramint.2011.10.082

DO - 10.1016/j.ceramint.2011.10.082

M3 - 文章

AN - SCOPUS:84857059653

SN - 0272-8842

VL - 38

SP - 2305

EP - 2311

JO - Ceramics International

JF - Ceramics International

IS - 3

ER -

Stabilization of cubic structure in Mn-doped hafnia

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Keywords

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