Tetragonal Zirconium Oxide Prepared under High Pressure

Science  22 Nov 1963:
Vol. 142, Issue 3595, pp. 1059-1060
DOI: 10.1126/science.142.3595.1059


Tetragonal zirconium oxide, stable at room temperature, was synthesized at 15 to 20 kb and 12000 to 17000C. Rapid quenching produced a mixture of the monoclinic and tetragonal phases. The high-pressure specimens, when heated to 1200 ° C in air and quenched, reverted to the all-monoclinic form.