Effects of Impurities on the Mechanical Quality Factor of Lead Zirconate Titanate Ceramics

概要

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The values of mechanical quality factor Q_m are determined for lead zirconate titanate ceramics containing various oxides as impurities in various amounts. Impurities are found to be classified into two groups with respect to the change of Q_m values, viz., (1) Q_m decreases in the presence of impurities (e. g. Nb_2O_5), (2) Q_m increases in the presence of minor additions (e.g. Cr_2O_3). The values of Q_m are found to increase when both the amount of space charge and specific resistivity increase. This seems to be caused by the suppression of domain wall motion resulting from the prevention of space charge migration. An empirical formula is obtained for Q_m as a function of the reduced amount of space charge and specific resistivity.
社団法人応用物理学会の論文
1972-01-05