Densification and anisotropic grain growth in Sr2Nb2O7

B. Brahmaroutu; G. L. Messing; S. Trolier-McKinstry

doi:10.1023/A:1004850323295

Densification and anisotropic grain growth in Sr₂Nb₂O₇

B. Brahmaroutu
, G. L. Messing
, S. Trolier-McKinstry

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

24 Scopus citations

Abstract

Sr:Nb stoichiometry and donor-doping with La were found to affect densification behavior and anisotropic grain growth in Sr₂Nb₂O₇ ceramics. La-doping improved the high temperature a.c. resistivity, but inhibits grain growth by grain boundary pinning. The presence of excess Nb was found to promote anisotropic grain growth by forming a liquid at the grain boundaries in both undoped and doped Sr₂Nb₂O₇. Anisotropic grain growth in La-doped Sr₂Nb₂O₇ can be controlled by incorporating large template particles in a Nb-rich matrix. High sintered densities (approx. 98% of theoretical) were achieved in both undoped and La-doped samples.

Original language	English (US)
Pages (from-to)	5673-5680
Number of pages	8
Journal	Journal of Materials Science
Volume	35
Issue number	22
DOIs	https://doi.org/10.1023/A:1004850323295
State	Published - Nov 2000

All Science Journal Classification (ASJC) codes

General Materials Science
Mechanics of Materials
Mechanical Engineering

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title = "Densification and anisotropic grain growth in Sr2Nb2O7",

abstract = "Sr:Nb stoichiometry and donor-doping with La were found to affect densification behavior and anisotropic grain growth in Sr2Nb2O7 ceramics. La-doping improved the high temperature a.c. resistivity, but inhibits grain growth by grain boundary pinning. The presence of excess Nb was found to promote anisotropic grain growth by forming a liquid at the grain boundaries in both undoped and doped Sr2Nb2O7. Anisotropic grain growth in La-doped Sr2Nb2O7 can be controlled by incorporating large template particles in a Nb-rich matrix. High sintered densities (approx. 98\% of theoretical) were achieved in both undoped and La-doped samples.",

author = "B. Brahmaroutu and Messing, \{G. L.\} and S. Trolier-McKinstry",

note = "Funding Information: Financial support from the Defense Advanced Research Projects Agency (\#F49620-94-1-0428) and Office of Naval Research (\#N00014-98-1-0527) are gratefully acknowledged.",

year = "2000",

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doi = "10.1023/A:1004850323295",

language = "English (US)",

volume = "35",

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journal = "Journal of Materials Science",

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TY - JOUR

T1 - Densification and anisotropic grain growth in Sr2Nb2O7

AU - Brahmaroutu, B.

AU - Messing, G. L.

AU - Trolier-McKinstry, S.

N1 - Funding Information: Financial support from the Defense Advanced Research Projects Agency (#F49620-94-1-0428) and Office of Naval Research (#N00014-98-1-0527) are gratefully acknowledged.

PY - 2000/11

Y1 - 2000/11

N2 - Sr:Nb stoichiometry and donor-doping with La were found to affect densification behavior and anisotropic grain growth in Sr2Nb2O7 ceramics. La-doping improved the high temperature a.c. resistivity, but inhibits grain growth by grain boundary pinning. The presence of excess Nb was found to promote anisotropic grain growth by forming a liquid at the grain boundaries in both undoped and doped Sr2Nb2O7. Anisotropic grain growth in La-doped Sr2Nb2O7 can be controlled by incorporating large template particles in a Nb-rich matrix. High sintered densities (approx. 98% of theoretical) were achieved in both undoped and La-doped samples.

AB - Sr:Nb stoichiometry and donor-doping with La were found to affect densification behavior and anisotropic grain growth in Sr2Nb2O7 ceramics. La-doping improved the high temperature a.c. resistivity, but inhibits grain growth by grain boundary pinning. The presence of excess Nb was found to promote anisotropic grain growth by forming a liquid at the grain boundaries in both undoped and doped Sr2Nb2O7. Anisotropic grain growth in La-doped Sr2Nb2O7 can be controlled by incorporating large template particles in a Nb-rich matrix. High sintered densities (approx. 98% of theoretical) were achieved in both undoped and La-doped samples.

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U2 - 10.1023/A:1004850323295

DO - 10.1023/A:1004850323295

M3 - Article

AN - SCOPUS:0034315110

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EP - 5680

JO - Journal of Materials Science

JF - Journal of Materials Science

IS - 22

ER -

Densification and anisotropic grain growth in Sr₂Nb₂O₇

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