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The study of prepration of blue V zircon pigment by using zircon and sulphuric acid

Riahi, M ; Sharif University of Technology | 2010

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  1. Type of Document: Article
  2. DOI: 10.1002/9780470880456.ch18
  3. Publisher: 2010
  4. Abstract:
  5. Depending on the type of dopant metal, many kinds of zircon based pigments are produced and blue vanadium pigment is the most important one of them. In this study, blue zircon ceramic pigments were synthesized from intermediate product, resulting from decomposition of zircon sand with NaOH. In this regard, various amounts of sulfuric acid, water, NH4VO3 as colorant, NaF as mineralizer and extra quartz were added to the prepared Na 2ZrSiO5. Role of quartz was to omit the repercussions of presence of free zirconia in the composition. The main objective of this work is to assess various reactions at different temperatures during blue pigment synthesis. Phase analysis was done by X ray diffraction and infrared spectroscopy. Color quality was determined by CIE Lab. The best composition was studied by DTA to determine temperatures of the reactions. Powders heated at various temperatures were studied by X ray diffraction and infrared spectroscopy to investigate crystallization behavior. It was concluded that V+5 doped tetragonal zirconia has first been formed at temperatures lower than 600°C. Then, from 820 to 890°C, an endothermic reaction of formation of monoclinic zirconia from tetragonal zirconia and an exothermic reaction of formation of zircon from monoclinic zirconia and quartz occur, respectively
  6. Keywords:
  7. Sodium silicozirconate ; Blue pigment ; Ceramic pigment ; Color quality ; Crystallization behavior ; Dopant metals ; Endothermic reactions ; Intermediate product ; Monoclinic zirconia ; Phase analysis ; Sulphuric acids ; Tetragonal zirconia ; Tetrahedral ; Zircon sand ; Ceramic materials ; Doping (additives) ; Glass ; Infrared spectroscopy ; Innovation ; Oxide minerals ; Paint ; Quartz ; Silicate minerals ; Sodium ; Sulfuric acid ; Synthesis (chemical) ; Vanadium ; Vanadium alloys ; X ray diffraction ; X ray diffraction analysis ; Zircon ; Zirconia
  8. Source: Innovative Processing and Manufacturing of Advanced Ceramics and Composites - 8th Pacific Rim Conference on Ceramic and Glass Technology, PACRIM 8, Vancouver, BC, 31 May 2009 through 5 June 2009 ; Volume 212 , JUL , 2010 , Pages 197-206 ; 10421122 (ISSN); 9780470876466 (ISBN)
  9. URL: http://onlinelibrary.wiley.com/doi/10.1002/9780470880456.ch18/summary