Metastable phase evolution in TiO2-YO3/2-ZrO 2

Tobias Schaedler; Solome Girma; Ashutosh S. Gandhi; Sanjay Sampath; Carlos G. Levi

Metastable phase evolution in TiO₂-YO_3/2-ZrO ₂

Tobias Schaedler
, Solome Girma
, Ashutosh S. Gandhi
, Sanjay Sampath
, Carlos G. Levi

Materials Science and Engineering

University of California at Santa Barbara
Stony Brook University

Research output: Contribution to journal › Conference article › peer-review

Abstract

The metastable-to-equilibrium phase evolution over a wide range of compositions in the TiO₂-YO_3/2-ZrO₂ system was investigated. The competing phases are all derivatives of the fluorite structure and compositions within the fluorite and pyrochlore fields exhibit technologically interesting ionic and mixed ionic-electronic conductivity. Powders of various compositions were synthesized by precursor routes, pyrolyzed and subsequently heat-treated in a stepwise manner at progressively higher temperatures to explore the sequence of phase evolution. Extended solid solutions with amorphous, fluorite and ordered pyrochlore structures were produced over significant composition ranges within the ternary. The study also sheds new light on the correct form of the phase equilibria at 1300°C.

Original language	English
Article number	K3.11
Pages (from-to)	69-74
Number of pages	6
Journal	Materials Research Society Symposium - Proceedings
Volume	835
State	Published - 2005
Event	Solid State Ionics - 2004 - Boston, MA, United States Duration: Nov 29 2004 → Dec 2 2004

Cite this

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title = "Metastable phase evolution in TiO2-YO3/2-ZrO 2",

abstract = "The metastable-to-equilibrium phase evolution over a wide range of compositions in the TiO2-YO3/2-ZrO2 system was investigated. The competing phases are all derivatives of the fluorite structure and compositions within the fluorite and pyrochlore fields exhibit technologically interesting ionic and mixed ionic-electronic conductivity. Powders of various compositions were synthesized by precursor routes, pyrolyzed and subsequently heat-treated in a stepwise manner at progressively higher temperatures to explore the sequence of phase evolution. Extended solid solutions with amorphous, fluorite and ordered pyrochlore structures were produced over significant composition ranges within the ternary. The study also sheds new light on the correct form of the phase equilibria at 1300°C.",

author = "Tobias Schaedler and Solome Girma and Gandhi, \{Ashutosh S.\} and Sanjay Sampath and Levi, \{Carlos G.\}",

year = "2005",

language = "English",

volume = "835",

pages = "69--74",

journal = "Materials Research Society Symposium - Proceedings",

issn = "0272-9172",

note = "Solid State Ionics - 2004 ; Conference date: 29-11-2004 Through 02-12-2004",

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TY - JOUR

T1 - Metastable phase evolution in TiO2-YO3/2-ZrO 2

AU - Schaedler, Tobias

AU - Girma, Solome

AU - Gandhi, Ashutosh S.

AU - Sampath, Sanjay

AU - Levi, Carlos G.

PY - 2005

Y1 - 2005

N2 - The metastable-to-equilibrium phase evolution over a wide range of compositions in the TiO2-YO3/2-ZrO2 system was investigated. The competing phases are all derivatives of the fluorite structure and compositions within the fluorite and pyrochlore fields exhibit technologically interesting ionic and mixed ionic-electronic conductivity. Powders of various compositions were synthesized by precursor routes, pyrolyzed and subsequently heat-treated in a stepwise manner at progressively higher temperatures to explore the sequence of phase evolution. Extended solid solutions with amorphous, fluorite and ordered pyrochlore structures were produced over significant composition ranges within the ternary. The study also sheds new light on the correct form of the phase equilibria at 1300°C.

AB - The metastable-to-equilibrium phase evolution over a wide range of compositions in the TiO2-YO3/2-ZrO2 system was investigated. The competing phases are all derivatives of the fluorite structure and compositions within the fluorite and pyrochlore fields exhibit technologically interesting ionic and mixed ionic-electronic conductivity. Powders of various compositions were synthesized by precursor routes, pyrolyzed and subsequently heat-treated in a stepwise manner at progressively higher temperatures to explore the sequence of phase evolution. Extended solid solutions with amorphous, fluorite and ordered pyrochlore structures were produced over significant composition ranges within the ternary. The study also sheds new light on the correct form of the phase equilibria at 1300°C.

UR - https://www.scopus.com/pages/publications/20344408061

M3 - Conference article

AN - SCOPUS:20344408061

SN - 0272-9172

VL - 835

SP - 69

EP - 74

JO - Materials Research Society Symposium - Proceedings

JF - Materials Research Society Symposium - Proceedings

M1 - K3.11

T2 - Solid State Ionics - 2004

Y2 - 29 November 2004 through 2 December 2004

ER -

Metastable phase evolution in TiO₂-YO_3/2-ZrO ₂

Abstract

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