title: [Effects of colorants on yttria stabilized tetragonal zirconia polycrystals powder].
abstract: OBJECTIVE
  To evaluate the effect of Fe2O3 and CeO2 as colorants on yttria stabilized tetragonal zirconia poly-crystals (Y-TZP) powder.
  
  
  METHODS
  The spray granulation slurry of colored zirconia was prepared with different concentrations of Fe2O3 (0.15%) and CeO2 (4%), which were added in Y-TZP. Zirconia powder was made by spray granulation. The powder specimens were divided into three groups: uncolored zirconia, Fe2O3 (0.15%) zirconia, and CeO2 (4%) zirconia. The particle morphologies of the powder specimens were measured with a laser particle size analyzer and an optical microscope.
  
  
  RESULTS
  The differences in D50 among the three groups were statistically significant (P<0.05). Group Fe2O3 showed a significant difference from groups CeO2 and uncolored zirconia (P<0.05). Group uncolored zirconia showed no significant difference from group CeO2 (P>0.05). Mostly spherical powder was observed in the three groups.
  
  
  CONCLUSIONS
  Fe2O3 as a colorant can affect particles, whereas CeO2 has no effect.
authors.forename: Bo
authors.initials: B
authors.lastname: Wang
authors.forename: Jianfeng
authors.initials: J
authors.lastname: Chen
authors.forename: Yanchun
authors.initials: Y
authors.lastname: Zhang
authors.forename: Ru
authors.initials: R
authors.lastname: Wang
mesh_terms: D003116:Color; D003799:Dental Stress Analysis; D005290:Ferric Compounds; D006801:Humans; D008422:Materials Testing; D015019:Yttrium / Q000737:chemistry*; D015040:Zirconium / Q000737:chemistry*
chemical_list: D005290:Ferric Compounds; C499362:yttria stabilized tetragonal zirconia; D015019:Yttrium; D015040:Zirconium; C028541:zirconium oxide; C091417:yttria