| abstract |
Transparent ceramic based on ZrO 2 or HfO 2 stabilized by stabilizer of at least one of Y 2 O 3 , Sc 2 O 3 , MgO, CaO and lanthanide oxide in the cubic crystal form, characterized in that (1) the crystal structure of ceramics based on zirconium or hafnium dioxide (ZrO 2 or HfO 2 ) is cubic, (2) the average diameter of the crystal grains is in the range of 5 to 300 μm, and (3) a fluoride selected from CaF 2 , MgF 2 , ScF 3 , YF 3 , ZrF 4 and fluorides of lanthanides, wherein the fluoride content is 0.05 to <1 wt%. |