Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1623213 | Journal of Alloys and Compounds | 2008 | 6 Pages |
Abstract
Crystal structures and thermal expansion properties of solid solutions Ln2−xDyxW3O12 (Ln = Er and Y) were studied by room and high temperature X-ray diffraction. Rietveld analysis results show that compounds Er2−xDyxW3O12 with 0 ≤ x ≤ 0.7 and Y2−xDyxW3O12 with 0 ≤ x ≤ 1.0 have orthorhombic structures and show negative thermal expansion in temperature range of 200–800 °C while compounds Er2−xDyxW3O12 with 1.2 ≤ x ≤ 2.0 and Y2−xDyxW3O12 with 1.5 ≤ x ≤ 2.0 have monoclinic structures and exhibit positive thermal expansion in temperature range of 25–800 °C. Thermogravimetric (TG) and differential thermal analysis (DTA) were used to study the hygroscopicity and the phase transition temperature.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
X.L. Xiao, J. Peng, M.M. Wu, Y.Z. Cheng, D.F. Chen, Z.B. Hu,