In:
Japanese Journal of Applied Physics, IOP Publishing, Vol. 34, No. 8R ( 1995-08-01), p. 4137-
Abstract:
Powders of lanthanum-modified lead zirconate titanate (Pb 0.91 La 0.09 )(Zr 0.65 Ti 0.35 ) 0.98 O 3 (PLZT 9/65/35) were obtained by calcination of various precursors via chemical coprecipitation methods. The precursors included the coprecipitated gel with the stoichiometric PLZT composition, PbO (powdered chemical reagent)+LZT coprecipitated gel, and mixture of Pb, La, Zr, and Ti individually precipitated gels. Crystallization behaviors of these precursors were examined over the temperature range of 400°-900° C using X-ray diffraction (XRD), transmission electron microscopy (TEM) and differential thermal analysis/thermal gravimetric analysis (DTA/TGA) techniques. For coprecipitated PLZT gels, perovskite PLZT accompanied by pyrochlore crystallized at 500° C; further heating promoted the development of PLZT, and single-phase PLZT was achieved at 700° C. For PbO+LZT coprecipitated gels, PLZT began to form at 550° C. The formation reaction was complete at 800° C and only a limited amount of pyrochlore intermediate was detected by XRD.
For the mixture of Pb, La, Zr, and Ti gels, PLZT crystallized at 900° C, litharge, massicot, PbTiO 3 (PT), and PbZrO 3 (PZ) were formed as the intermediate phase instead of pyrochlore.
Type of Medium:
Online Resource
ISSN:
0021-4922
,
1347-4065
DOI:
10.1143/JJAP.34.4137
Language:
Unknown
Publisher:
IOP Publishing
Publication Date:
1995
detail.hit.zdb_id:
218223-3
detail.hit.zdb_id:
797294-5
detail.hit.zdb_id:
2006801-3
detail.hit.zdb_id:
797295-7
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