title: sZrO2-CeO2 ceramic powders obtained from a sol-gel process using acetylacetone as a chelating agent for potential application in prosthetic dentistry.
abstract: OBJECTIVE
  The main objective of this study was to obtain single-phase β-ZrO2 powders with so-called soft agglomerates reproducibile morphology with acetyl-acetone as a chelating-agent. To the best of our knowledge there is no avaiable data which determine the effect of acetyl acetone on the phase composition and morphology of ceria-doped ZrO2 powders for biomedical applications.
  
  
  METHODS
  Twenty variants of powders with different water to zirconia precursor and acetylacetone to zirconia precursor molar ratios were prepared. 0.9ZrO20.1CeO2 powders were obtained by a hydrolysis and condensation and further calcination of zirconium n-propoxide in a simple one-step sol-gel process. Influence of acetyloacetone to zirconia precursor on the phase composition ratio and water to zirconia precursor was investigated. Samples have been characterized by X-ray diffraction (XRD), Raman spectroscopy (RS), thermal analysis (TGA/DTA) and scanning electron microscopy (SEM) measurements.
  
  
  RESULTS
  Ceramic powders prepared by sol-gel process, according to the various concentration of chelating agent and water show different morphology and phase composition.
  
  
  CONCLUSIONS
  Higher molar ratios of AcAc in range with smaller amounts of water cause hard agglomerates, obtained powders are characterized by highly thermally stable behaviour and various phase composition. With higher molar ratios of water to zirconium-n-propoxide so-called soft agglomerates and one phase powders are obtained.
authors.affiliation: Department of Biomaterials and Medical Devices Engineering, Silesian University of Technology, Zabrze, Poland.
authors.forename: Damian
authors.initials: D
authors.lastname: Nakonieczny
authors.affiliation: Department of Biomaterials and Medical Devices Engineering, Silesian University of Technology, Zabrze, Poland.
authors.forename: Zbigniew
authors.initials: Z
authors.lastname: Paszenda
authors.affiliation: Department of Optoelectronics, Silesian University of Technology, Gliwice, Poland.
authors.forename: Sabina
authors.initials: S
authors.lastname: Drewniak
authors.affiliation: Institute for Chemical Processing of Coal, Zabrze, Poland.
authors.forename: Tomasz
authors.initials: T
authors.lastname: Radko
authors.affiliation: Institute of Non-Ferrous Metals, Division of Powders and Composite Materials, Gliwice, Poland.
authors.forename: Marcin
authors.initials: M
authors.lastname: Lis
mesh_terms: D002516:Ceramics / Q000494:pharmacology*; D002563:Cerium / Q000494:pharmacology*; D002614:Chelating Agents / Q000737:chemistry*; D017266:Dental Prosthesis / Q000379:methods*; D006868:Hydrolysis; D010422:Pentanones / Q000737:chemistry*; D044367:Phase Transition; D011208:Powders; D013059:Spectrum Analysis, Raman; D013696:Temperature; D014961:X-Ray Diffraction; D015040:Zirconium / Q000494:pharmacology*
chemical_list: D002614:Chelating Agents; D010422:Pentanones; D011208:Powders; D002563:Cerium; C008790:acetylacetone; C030583:ceric oxide; D015040:Zirconium; C028541:zirconium oxide