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Synthesis and properties of willemite Zn2SiO4, and M2+: Zn2SiO4 (M = Co and Ni)

Chandrappa, GT and Ghosh, S and Patil, KC (1999) Synthesis and properties of willemite Zn2SiO4, and M2+: Zn2SiO4 (M = Co and Ni). In: Journal of Materials Synthesis and Processing, 7 (5). pp. 273-279.

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Fine particles of willemite, alpha -Zn2SiO4, were prepared by both solution combustion and sol-gel methods. Both processes yield single-phase, large-surface area (26- and 78-m(2)/g), sinteractive willemite powders. Thermal evolution of crystalline phases was studied using X-ray powder diffraction patterns. The combustion method favors low-temperature formation of willemite compared to the sol-gel method. The powders, when uniaxially pressed and sintered at 1300 degreesC, achieved 78-80% theoretical density. The microstructures of the sintered body show the presence of equiaxed 0.5- to 4-mum grains. Blue pigments of willemite doped with Co2+ and Ni2+ were also prepared by the combustion process.

Item Type: Journal Article
Publication: Journal of Materials Synthesis and Processing
Publisher: Springer
Additional Information: Copyright of this article belongs to Springer.
Keywords: Combustion;sol-gel;redox mixtures;willemite;pigments.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 30 Jun 2011 08:53
Last Modified: 30 Jun 2011 08:53
URI: http://eprints.iisc.ac.in/id/eprint/38822

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