Phase separation and crystallization in LiNbO3/SiO2 glasses
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-micr...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
2014
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| Online Access: | http://www.scopus.com/inward/record.url?eid=2-s2.0-58149172035&partnerID=40&md5=a076c45097da02e2ac8bb0570459e728 http://cmuir.cmu.ac.th/handle/6653943832/5934 |
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| Institution: | Chiang Mai University |
| Language: | English |
| Summary: | 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. © 2008 Elsevier B.V. All rights reserved. |
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