Journal ArticleDOI
Monoclinic-to-Tetragonal Phase Transformation in a Ceramic Rare-Earth Orthoniobate, LaNbO4
Li Jian,C. M. Wayman +1 more
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TLDR
The monoclinic-to-tetragonal phase transformation in LaNbO4 has been investigated by X-ray diffraction and dilatometry in this article.Abstract:
The monoclinic-to-tetragonal phase transformation in LaNbO4 has been investigated by X-ray diffraction and dilatometry. Based on the experimental results and theoretical concerns (Landau theory and thermodynamics), it is suggested that this transformation is second order in nature.read more
Citations
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Pressure effects on the structural and electronic properties of ABX 4 scintillating crystals
TL;DR: In this paper, the phase behavior of scheelite-structured orthotungstates has been extensively studied up to 50 GPa and different experimental techniques for obtaining reliable data at simultaneously high pressure and high temperature.
Journal ArticleDOI
Pressure effects on the structural and electronic properties of ABX4 scintillating crystals
TL;DR: In this article, the phase behavior of scheelite-structured orthotungstates has been extensively studied up to 50 GPa and different experimental techniques for obtaining reliable data at simultaneously high pressure and high temperature.
Journal ArticleDOI
Microwave Dielectric Properties of Rare-Earth Ortho-Niobates with Ferroelasticity
TL;DR: In this paper, the phase transformation and ferroelastic domain configuration of rare-earth niobate series (RENbO4) were studied using in situ X-ray diffraction and high-resolution transmission electron microscopy.
Journal ArticleDOI
Host-sensitized luminescence in LaNbO4:Ln3+ (Ln3+ = Eu3+/Tb3+/Dy3+) with different emission colors
TL;DR: The results from the PL and CL properties of LNO:Eu(3+)/Tb( 3+)/Dy(3+) suggest their potential in solid-state lighting and display fields, and the characteristic emissions similar to PL spectra were reserved.
Journal ArticleDOI
The tetragonal–monoclinic, ferroelastic transformation in yttrium tantalate and effect of zirconia alloying
TL;DR: In this paper, the effect of zirconia concentration on the tetragonal-to-monoclinic phase transition has been studied using high-temperature X-ray diffraction, Raman spectroscopy and electron microscopy.
References
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Journal ArticleDOI
Determination of the State Parameters and Formulation of Spontaneous Strain for Ferroelastics
TL;DR: In this article, the spontaneous strain of a crystal which becomes ferroelastic is defined as a linear combination of linear combinations of elements of mechanical strain tensors each of which, at null stress, is not equal in all the orientation states of the crystal and is zero over the whole temperature range in the prototypic phase.
Journal ArticleDOI
Strain-Tensor Components Expressed in Terms of Lattice Parameters
TL;DR: In this paper, expressions for the components of the linear Lagrangians, linear Eulerian, finite Lagrangian (Green's), and finite Eulerians (Almansi's) strain tensors in terms of a crystal's lattice parameters before and after a deformation are developed.
Journal ArticleDOI
High‐Temperature Transitions in Rare‐Earth Niobates and TantaIates
TL;DR: The high-temperature transition monoclinic tetragonal in the rare-earth tantalates and niobates with the formula AB04 was investigated using a hightemperature X-ray diffractometer as mentioned in this paper.
Journal ArticleDOI
The high-temperature paraelastic structure of LaNbO4
TL;DR: The high-temperature structure of tetragonal LaNbO 4 has been determined by powder neutron diffraction methods as discussed by the authors, and the structure is isomorphous with scheelite (CaWO 4 ) and is unusual in that it contains Nb 5+ ions in an almost undistorted tetrahedral oxygen environment.
Journal ArticleDOI
Domain Boundary and Domain Switching in a Ceramic Rare-Earth Orthoniobate LaNbO4
Li Jian,C. Marvin Wayman +1 more
TL;DR: In this paper, a model for domain boundary configuration, a diffuse boundary with a transition zone, has been proposed according to TEM diffraction patterns and HRTEM images, and a domain switching mechanism is suggested, and the corresponding driving force for domain switching is considered.
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