Preparation and properties of new oxygen ion conductors for use at low temperatures

K. Keizer; M.J. Verkerk; A.J. Burggraaf

doi:10.1016/0390-5519(79)90022-X

Preparation and properties of new oxygen ion conductors for use at low temperatures

K. Keizer, M.J. Verkerk, A.J. Burggraaf

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Abstract

Two new systems, Bi₂O₃-Er₂O₃ and ZrO₂-Y2O₃(CaO)-Bi₂O₃ were investigated. The first system has a homogeneous cubic, fluorite phase between 17.5 and 45.5 mol % Er₂O₃ and can be sintered to densities near 95% at 1200 K. At temperatures between 700 K and 1000 K the highest value of the a.c. oxygen ion conduction in this system is twice as much as the highest value found in the literature. In the second system concentrations of 1–3 mol % Bi2O₃ act as an excellent sintering aid for ZrO₂-Y₂O₃ and ZrO₂-CaO samples which can be sintered to densities higher than 95% at temperatures of 1350 K. During this procedure a liquid ZrO₂-Bi₂O₃ phase exists from which Bi₂O₃ partly evaporates with increasing sintering time. The oxygen ion conduction is little affected by the Bi₂O₃-rich second phase. The influence of annealing procedures up to 1570 K on the conduction in the ZrO₂-Y₂O₃-Bi₂O₃ system is small despite weight losses up to 4%.

Original language	English
Pages (from-to)	143-147
Journal	Ceramurgia International
Volume	5
Issue number	4
DOIs	https://doi.org/10.1016/0390-5519(79)90022-X
Publication status	Published - 1979

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title = "Preparation and properties of new oxygen ion conductors for use at low temperatures",

abstract = "Two new systems, Bi2O3-Er2O3 and ZrO2-Y2O3(CaO)-Bi2O3 were investigated. The first system has a homogeneous cubic, fluorite phase between 17.5 and 45.5 mol % Er2O3 and can be sintered to densities near 95% at 1200 K. At temperatures between 700 K and 1000 K the highest value of the a.c. oxygen ion conduction in this system is twice as much as the highest value found in the literature. In the second system concentrations of 1–3 mol % Bi2O3 act as an excellent sintering aid for ZrO2-Y2O3 and ZrO2-CaO samples which can be sintered to densities higher than 95% at temperatures of 1350 K. During this procedure a liquid ZrO2-Bi2O3 phase exists from which Bi2O3 partly evaporates with increasing sintering time. The oxygen ion conduction is little affected by the Bi2O3-rich second phase. The influence of annealing procedures up to 1570 K on the conduction in the ZrO2-Y2O3-Bi2O3 system is small despite weight losses up to 4%.",

author = "K. Keizer and M.J. Verkerk and A.J. Burggraaf",

year = "1979",

doi = "10.1016/0390-5519(79)90022-X",

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journal = "Ceramurgia International",

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TY - JOUR

T1 - Preparation and properties of new oxygen ion conductors for use at low temperatures

AU - Keizer, K.

AU - Verkerk, M.J.

AU - Burggraaf, A.J.

PY - 1979

Y1 - 1979

N2 - Two new systems, Bi2O3-Er2O3 and ZrO2-Y2O3(CaO)-Bi2O3 were investigated. The first system has a homogeneous cubic, fluorite phase between 17.5 and 45.5 mol % Er2O3 and can be sintered to densities near 95% at 1200 K. At temperatures between 700 K and 1000 K the highest value of the a.c. oxygen ion conduction in this system is twice as much as the highest value found in the literature. In the second system concentrations of 1–3 mol % Bi2O3 act as an excellent sintering aid for ZrO2-Y2O3 and ZrO2-CaO samples which can be sintered to densities higher than 95% at temperatures of 1350 K. During this procedure a liquid ZrO2-Bi2O3 phase exists from which Bi2O3 partly evaporates with increasing sintering time. The oxygen ion conduction is little affected by the Bi2O3-rich second phase. The influence of annealing procedures up to 1570 K on the conduction in the ZrO2-Y2O3-Bi2O3 system is small despite weight losses up to 4%.

AB - Two new systems, Bi2O3-Er2O3 and ZrO2-Y2O3(CaO)-Bi2O3 were investigated. The first system has a homogeneous cubic, fluorite phase between 17.5 and 45.5 mol % Er2O3 and can be sintered to densities near 95% at 1200 K. At temperatures between 700 K and 1000 K the highest value of the a.c. oxygen ion conduction in this system is twice as much as the highest value found in the literature. In the second system concentrations of 1–3 mol % Bi2O3 act as an excellent sintering aid for ZrO2-Y2O3 and ZrO2-CaO samples which can be sintered to densities higher than 95% at temperatures of 1350 K. During this procedure a liquid ZrO2-Bi2O3 phase exists from which Bi2O3 partly evaporates with increasing sintering time. The oxygen ion conduction is little affected by the Bi2O3-rich second phase. The influence of annealing procedures up to 1570 K on the conduction in the ZrO2-Y2O3-Bi2O3 system is small despite weight losses up to 4%.

U2 - 10.1016/0390-5519(79)90022-X

DO - 10.1016/0390-5519(79)90022-X

M3 - Article

SN - 0390-5519

VL - 5

SP - 143

EP - 147

JO - Ceramurgia International

JF - Ceramurgia International

IS - 4

ER -

Preparation and properties of new oxygen ion conductors for use at low temperatures

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