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
SN - 0022-2461
VL - 35
SP - 5673
EP - 5680
JO - Journal of Materials Science
JF - Journal of Materials Science
IS - 22
ER -