Showing papers on "Lead zirconate titanate published in 1977"
TL;DR: In this paper, the electrical conductivity and thermoelectric power of lead zitconate-titanate Pb(Ti0.47Zr0.53)O3 (PZT) have been studied at temperatures up to 1000°C in gaseous ambients with controlled partial pressures of both volatile components: lead oxide and oxygen.
Abstract: The electrical conductivity and thermoelectric power of lead zitconate-titanate Pb(Ti0.47Zr0.53)O3 (PZT) have been studied at temperatures up to 1000°C in gaseous ambients with controlled partial pressures of both volatile components: lead oxide and oxygen. The experimental results show the small polaron conduction mechanism in PZT. The predominant point defects, as obtained from the oxygen pressure dependences of the conductivity and thermopower, are fully ionized vacancies of lead and oxygen with almost equal concentrations: [image omitted]
63 citations
TL;DR: Differential thermal analysis has been used to examine the reactions involved in the formation of lead zirconate titanate and related materials as mentioned in this paper, and the results suggest that the calcination reaction to form lead Zirconately titanate is a more complex process than has been recognized, which suggests that PbO and PbTiO3 react in the vicinity of 750°C.
11 citations
TL;DR: The purpose of the present work was to investigate the effect of the PbO activity of a packing powder on the densification of Sc-doped PZT during sintering and a high-density Sc- doped sample was achieved.
Abstract: Purpose of the present work was to investigate the effect of the PbO activity of a packing powder on the densification of Sc-doped PZT during sintering. A high-density Sc-doped sample was achieved.
7 citations
01 Jun 1977
TL;DR: In this paper, the results of batch-to-batch reproducibility of LZT powders made by molten salt synthesis were carried out by measuring the properties of ceramics fired from them.
Abstract: : Tests of batch-to-batch reproducibility of LZT powders made by molten salt synthesis were carried out by measuring the properties of ceramics fired from them. Individual post-poling dielectric constants and planar coupling coefficients lay within plus or minus 4% and plus or minus 7%, respectively, of the average of all samples fired in the same way. Striking similarities in characteristic aging behavior of the dielectric constant among all samples from all powder batches that were fired in the same way were observed. The characteristics changed with the firing method. Tests of poling behavior indicate an effect of post-firing history on properties achieved in subsequent polings of a sample. The presence of unreacted zirconia in the starting powder was found to be deleterious to ceramic properties.
1 citations