Used as a ceramic material in dental and medical implants due to its high strength, biocompatibility, and resistance to wear. Commonly applied in oxygen sensors and fuel cells because of its high ionic conductivity when doped with certain metal oxides. Employed in thermal barrier coatings for turbine blades to withstand high temperatures and reduce heat transfer. Utilized in abrasives, refractories, and as a stabilizer in the production of specialty glasses. Also found in some cosmetics and sunscreens as a white pigment and UV blocker.