Densification and anisotropic grain growth in Sr2Nb2O7
Source abstract
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 (∼98% of theoretical) were achieved in both undoped and La-doped samples.
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Research context
OpenAlex topics: Advanced ceramic materials synthesis · Ferroelectric and Piezoelectric Materials · Microwave Dielectric Ceramics Synthesis
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References (16)
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