The extraordinarily low dimensions of zirconium hydroxide
synthesized with hydrolysis ratios lower than 1 led to a complete
transformation of zirconium hydroxide to zircon simply through
a typical industrial porcelain stoneware cycle with a maximum
temperature of 1215 C held for 10 min. This latter finding extends
the applicability of the developed treatment to a wide range of tile
finishes, including bright and dark colors. It is worthwhile to note
that the obtained coating is permanent with no need of costly and
time-consuming periodical treatments.