A novel Co-ions complexation method to synthesize pyrochlore La2Zr2O7. Issue 8 (July 2017)

• Record Type: Journal Article
• Authors: Xu, Chunhui; Jin, Hongyun; Zhang, Qifeng; Huang, Can; Zou, Daifeng; He, Fujian; Hou, Shuen
• Is Part Of: Journal of the European Ceramic Society. Volume 37:Issue 8(2017)
• Page Start: 2871
• Page End: 2876
• Publication Date: 2017-07
• Subjects: Lanthanum zirconate -- Co-ions complexation method -- Solid-state method -- Thermal barrier coatings -- Thermal conductivity; Ceramic materials -- Periodicals; Composite materials -- Periodicals; Matériaux céramiques -- Périodiques; Composites -- Périodiques; Ceramic materials; Composite materials; Periodicals; Electronic journals; 666.05
• DOI: 10.1016/j.jeurceramsoc.2017.02.045
• Languages: English
• ISSNs: 0955-2219

Abstract

Abstract: Pure pyrochlore Lanthanum zirconate (LZ) was synthesized by co-ions complexation method (CCM) at 1300 °C, which is 300 °C lower than that by solid-state method (SSM). At 1450 °C, the LZ prepared by CCM possessed lower thermal conductivity (1.15 W/m K) than that obtained by SSM (1.99 W/m K). This significant decrease may be caused by the different grain size, which is 300 nm and 2.5 μm synthesized by CCM and SSM, respectively. LZ precursor was belt-shaped and the belt shorten and the grain grown with the temperature increasing. Fourier transform infrared spectroscopy suggested the solidification in CCM forms from the complexation between La 3+, Zr 4+ and CH3 COO −, which is the key for solidification. Compared to SSM, CCM is a lower temperature and simpler technology to synthesize nano-size LZ and other rare-earth oxides.