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A study was conducted on the effects of compositional modifications on the temperature coefficient of resonance frequency (TCF) in the disc planar vibration mode for the bismuth layer-structured compound SrBi 2 Nb 2 O 9 (SBN)-based ceramics. The substitution of the strontium site by divalent and trivalent ions improved the TCF, accompanying the relaxation of elastic anomaly. The tolerance factor, t , was calculated for a pseudo cubic block to study the contribution of the structural factor to Curie temperature, T C , and the temperature of elastic anomaly, T ea , for each sample. T ea showed no apparent tendency with t , whereas T C increased as t decreased.
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Sawada et al. (2003) studied this question.
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