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Synthesis, Vaporization and Thermodynamic Properties of Superfine Nd 2 Hf 2 O 7 and Gd 2 Hf 2 O 7
Author(s) -
Sevastyanov Vladimir G.,
Simonenko Elizaveta P.,
Simonenko Nikolay P.,
Stolyarova Valentina L.,
Lopatin Sergey I.,
Kuznetsov Nikolay T.
Publication year - 2013
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201300253
Subject(s) - chemistry , vaporization , neodymium , pyrochlore , gadolinium , analytical chemistry (journal) , atmospheric temperature range , thermodynamics , phase (matter) , physics , organic chemistry , chromatography , optics , laser
Finely dispersed powders of neodymium and gadolinium hafnates (Nd 2 Hf 2 O 7 and Gd 2 Hf 2 O 7 ) with pyrochlore structure were synthesized. Variations in particle size and morphology during thermal treatment under different conditions (1273–1673 K, 2–4 h) were studied for these compounds. The vaporization behavior of Nd 2 Hf 2 O 7 and Gd 2 Hf 2 O 7 was examined in the temperature range 2100–2750 K. In addition, the thermodynamic properties of Nd 2 Hf 2 O 7 and Gd 2 Hf 2 O 7 in the above‐mentioned temperature interval were determined by using high‐temperature mass spectrometry.