SolGel Synthesis of Solid Solutions
Based on Zirconium and Hafnium Dioxides

T. I. Panova, L. V. Morozova*, I. A. Drozdova, and O. A. Shilova

Grebenshchikov Institute of Silicate Chemistry, Russian Academy of Sciences,
nab. Admirala Makarova 2, St. Petersburg, 199034 Russia

*e-mail: morozova_l_v@mail.ru

Received November 25, 2010

Abstract—The precursors based on ZrO₂ and HfO₂ with a narrow size distribution of agglomerated particles
(100–300 nm) have been synthesized by citrate sol–gel method. The conditions for formation of nanocrystalline
powders in the ZrO₂–(HfO₂)–Y₂O₃–(CeO₂) systems have been determined using the X-ray diffraction and dif-
ferential thermal analyses. Nanoceramic materials have been obtained and the temperature ranges of their sta-
bility have been determined.

Keywords: zirconium and hafnium dioxides, sol–gel synthesis, metal citrate complexes, etherification,
agglomerates, nanocrystalline powders

DOI: 10.1134/S1087659611050099

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