Journal ArticleDOI
Hygroscopicity and bulk thermal expansion in Y2W3O12
S. Sumithra,Arun M. Umarji +1 more
TLDR
In this paper, the effect of water on the thermal expansion behavior of a negative thermal expansion system is discussed. But the authors focus on the non-negative thermal expansion of a trihydrate composition whose X-ray diffraction pattern can be indexed to an orthorhombic unit cell.About:
This article is published in Materials Research Bulletin.The article was published on 2005-01-04. It has received 79 citations till now. The article focuses on the topics: Negative thermal expansion & Thermal expansion.read more
Citations
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Negative thermal expansion and associated anomalous physical properties: review of the lattice dynamics theoretical foundation.
Martin T. Dove,Hong Fang +1 more
TL;DR: This paper identifies a number of different cases of vibrational mechanisms of NTE, some of which involve a small number of phonons that can be described as involving rotations of rigid polyhedral groups of atoms, others where there are large bands of phonon involved, and some where the transverse acoustic modes provide the main contribution to NTE.
Journal ArticleDOI
Negative thermal expansion in Y2Mo3O12
TL;DR: The crystal structure of Y2Mo3O12 was refined by the Rietveld method for 130°C as orthorhombic with space group Pbcn (No. 60).
Journal ArticleDOI
Negative thermal expansion in rare earth molybdates
S. Sumithra,Arun M. Umarji +1 more
TL;DR: In this article, the authors measured negative thermal expansion in rare earth molybdates of orthorhombic structure (A = Y, Er, Yb and Lu) by high temperature X-ray diffraction and dilatometry.
Journal ArticleDOI
Controllable synthesis and tunable luminescence properties of Y2(WO4)3:Ln3+ (Ln = Eu, Yb/Er, Yb/Tm and Yb/Ho) 3D hierarchical architectures
TL;DR: The results reveal that the morphology and dimensions of the as-prepared precursors can be effectively tuned by altering the amounts of organic SDBS and the reaction time, and the possible formation mechanism was also proposed.
Journal ArticleDOI
Simultaneous Enhancement and Modulation of Upconversion by Thermal Stimulation in Sc2Mo3O12 Crystals.
TL;DR: Anomalous temperature-dependence of upconversion luminescence in Yb/Ho co-doped Sc2Mo3O12 crystals is reported, highlighting a general approach for highly reversible control ofupconversion by temperature in the ambient air.
References
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Journal ArticleDOI
Negative Thermal Expansion from 0.3 to 1050 Kelvin in ZrW2O8
TL;DR: Negative thermal expansion was found for ZrW 2 O 8 from 0.3 kelvin to its decomposition temperature of about 1050 klvin by using both neutron and x-ray diffraction data as mentioned in this paper.
Journal ArticleDOI
Negative Thermal Expansion in a Large Molybdate and Tungstate Family
TL;DR: Negative thermal expansion has been discovered in a very large family of oxides represented by the formula A{sub 2}M{sub 3}O{sub 12} where the A and M cations are coordinated by oxygen octahedrally and tetrahedraally, respectively as discussed by the authors.
Journal ArticleDOI
Negative thermal expansion in Sc2(WO4)3
TL;DR: Rietveld refinement as a function of temperature suggests that the intrinsic negative thermal expansion can be related to transverse vibrations of bridging oxygen atoms in the structure, which leads to coupled tilting of the quasi-rigid framework polyhedra and causes the structure to become more dense with increasing temperature.
Journal ArticleDOI
A comprehensive study of trivalent tungstates and molybdates of the type L2(MO4)3
TL;DR: In this paper, some 66 compounds of rare earth and other trivalent ions of the types L 2 WO4)3 and L 2 MoO4 3 have been studied by means of X-ray powder diffraction, differential thermal analysis, and thermogravimetric analysis.