Open AccessВысокотемпературные фазовые переходы в ZrO-=SUB=-2-=/SUB=-
Author(s) -
В. П. Горелов
Publication year - 2019
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2019.07.47849.383
Subject(s) - tetragonal crystal system , monoclinic crystal system , phase transition , phase (matter) , crystallography , materials science , work (physics) , condensed matter physics , physics , chemistry , thermodynamics , crystal structure , quantum mechanics
. Analysis of the primary sources shows that there is only one reliable message about the observation of the cubic phase by x-ray method. This phase is observed at least 2500°C. All other reports on the observation of the phase transition in tetragonal modification at about 2300°C are reliable only regarding the existence of the transition at that temperature. But this is a transition to the t'-tetragonal phase. It should be concluded that at normal pressure ZrO2 has four polymorphic modifications: monoclinic (m), two tetragonal (t and t') and cubic (c), passing one to another with increasing temperature. Work is performed under partial support of RFBR grant 17-08-01227. The author is grateful to A.V. Kuzmin and V.B. Balakireva for valuable comments and assistance in the work.