ISSN:
1573-4803
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Abstract The formation of lead tantalates in the PbO-rich region is studied using the powders prepared by the simultaneous hydrolysis of lead and tantalum alkoxides. Cubic 3PbO · 2Ta2O5 solid solutions crystallize at low temperatures from amorphous materials between 60 and 75 mol% PbO. The lattice parameter,a, increases linearly from 1.0545 to 1.0705 nm with increasing PbO. At higher temperatures the solid solutions above 66.67 mol% PbO are transformed into those of rhombohedral 2PbO · Ta2O5. Rhombohedral 5PbO · 2Ta2O5 is formed at ∼850 to 900 °C by transformation of 2PbO·Ta2O5 solid solution corresponding to 71.43 mol% PbO. The existence of previously reported 3PbO·Ta2O5 is not confirmed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00576044
Permalink
