Stabilization of ZrO2 Concentrate by Rare Earth Elements (La, Nd, Pr, Ce)


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Abstract

The effect of annealing and sintering temperature on phase transformation of ZrO2 is studied in relation to REE concentrate content using differential thermal analysis, Raman spectroscopy and x-ray diffraction. It is shown that introduction of REE concentrate in an amount of more than 15 wt.% stabilizes ZrO2 tetragonal phase solely at below 1200 °C. A further increase in temperature leads to destabilization of the tetragonal phase with formation of the monoclinic and cubic phases of the Ln2Zr2O7 type isostructural compounds (n = La, Nd, ...) with a pyrochlore structure.

About the authors

V. B. Kul’met’eva

FGBOU VO Perm’ National research Polytechnic University

Author for correspondence.
Email: keramik@pm.pstu.ac.ru
Russian Federation, Perm’

S. E. Porozova

FGBOU VO Perm’ National research Polytechnic University

Email: keramik@pm.pstu.ac.ru
Russian Federation, Perm’

V. G. Gilev

FGBOU VO Perm’ National research Polytechnic University

Email: keramik@pm.pstu.ac.ru
Russian Federation, Perm’

D. S. Vokhmyanin

FGBOU VO Perm’ National research Polytechnic University

Email: keramik@pm.pstu.ac.ru
Russian Federation, Perm’

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