Facile corrosion synthesis and sintering of disperse pure tetragonal zirconia nanoparticles. Issue 13 (October 2016)

• Record Type: Journal Article
• Authors: Zhou, Hua; Pu, Sanxu; Huo, Junming; Cao, Wenbin; Wang, Bing; Li, Jiangong
• Is Part Of: Ceramics international. Volume 42:Issue 13(2016)
• Page Start: 15005
• Page End: 15011
• Publication Date: 2016-10
• Subjects: Zirconia -- Nanoparticles -- Hydrothermal corrosion -- Dispersity -- Sintering; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2016.06.148
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Disperse pure tetragonal zirconia ( t -ZrO2 ) nanoparticles smaller than 10 nm are essential for preparation of structural and functional zirconia materials, but syntheses of t -ZrO2 nanoparticles using inorganic zirconium salts usually result in severe agglomeration. In this paper, we report a hydrothermal corrosion approach for improving the dispersity of t -ZrO2 nanoparticles synthesized by precipitation using zirconium oxychloride without any surfactants. Disperse pure t -ZrO2 nanoparticles with average sizes of 4.5 and 6 nm and size distributions of 2–11 and 3–12 nm were obtained by calcining precipitates at 400 °C for 2 h and 500 °C for 0.5 h followed by HCl corrosion at 120 °C for 75 h, respectively. Disperse t -ZrO2 nanoparticles with an average size of 6 nm and a size distribution of 3–12 nm were pressed into green compacts at 500 MPa and sintered by two-step sintering (heating to 1150 °C without hold and decreasing to 1000 °C with a 10 h hold). The sintered bodies are dense pure monoclinic ZrO2 nanocrystalline ceramic with a relative density of 99.9% and an average grain size of 110 nm.