Passerini and Ruff et al discovered that the tetragonal or even the cubic form could be retained metastably
at room temperatures by alloying zirconia with other cubic oxides termed as stabilizers".4
In normal conditions, urine becomes metastably
supersaturated when it reaches the collecting ducts (Thamilselvan et al.
When it reaches the Curie point of 590 [degrees]C (30), it transforms metastably
and reversibly to the orthorhombic ferroelectric modification.