Zinc niobate derived from mechanochemically activated oxides

• Published in: Journal of alloys and compounds Vol. 347; no. 1; pp. 308 - 313
• Main Authors: Kong, L.B, Ma, J, Huang, H, Zhang, R.F, Zhang, T.S
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 16-12-2002; Elsevier
• Subjects: Ceramics; Cold working, work hardening; annealing, post-deformation annealing, quenching, tempering recovery, and crystallization; Cold working, work hardening; annealing, quenching, tempering, recovery, and recrystallization; textures; Cross-disciplinary physics: materials science; rheology; Exact sciences and technology; Machining, milling; Materials science; Materials synthesis; materials processing; Nanofabrications; Oxide materials; Physics; SEM; Treatment of materials and its effects on microstructure and properties; X-Ray diffraction; Nanofabrications; SEM; Ceramics; X-Ray diffraction; Oxide materials; Grain size; Annealing; Inorganic compounds; Ball mill; Grain growth; Ternary compounds; Zinc Niobates; Transition element compounds; Experimental study; Microstructure; Powder metallurgy; Oxide ceramics
• ISSN: 0925-8388; 1873-4669
• DOI: 10.1016/S0925-8388(02)00788-0

ZnO and Nb
2O
5 mixtures partially reacted to form ZnNb
2O
6 during a high-energy ball milling process after milling for 5–15 h. The milled powders were extremely active and almost single phase ZnNb
2O
6 could be achieved at a temperature as low as 500
°C. The effect of post-annealing on the grain growth and microstructure of the milled powders was investigated and discussed. Fully dense ZnNb
2O
6 ceramics with an average grain size of 5, 3.5 and 2.4 μm can be obtained at 1100
°C from the powders milled for 5, 10 and 15 h, respectively.