Nano Archive

Phase separation and crystallization in LiNbO3/SiO2 glasses

Prapitpongwanich , Pattamaporn and Pengpat, Kamonpan and Christian , Rüssel (2009) Phase separation and crystallization in LiNbO3/SiO2 glasses. Materials Chemistry and Physics, 113 (Issues 2-3). pp. 913-918. ISSN 0254-0584

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Abstract

Various samples with the compositions (100 − x)LiNbO3•xSiO2 (with x = 10, 20, 25, 30, 35, 40, 50 and 60) were prepared by conventional melting technique. Samples with 20 ≤ x ≤ 35 were transparent, while products with x = 10 or x ≥40 were at least partly opaque under the conditions supplied. TEM-micrographs of replicas gave evidence on phase separation in these glasses. At SiO2-concentrations >30 mol%, the formed structures consist of SiO2-rich droplets in a LiNbO3-rich matrix phase. The size of the structures increases with increasing SiO2-concentration. At an SiO2-concentration of 50 mol%, the droplets are as large as 450 nm. During thermal treatment, the LiNbO3-rich matrix phase crystallizes and forms lithium niobate.

Item Type:Article
Uncontrolled Keywords:Phase separation; Crystallization; Nano-crystals; Ferroelectrics; Lithium niobate; Glass–ceramics
Subjects:Material Science > Nanostructured materials
ID Code:7912
Deposited By:CSMNT
Deposited On:03 Jan 2010 03:12
Last Modified:03 Jan 2010 03:12

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