Phase transitions and proton conductivity in hafnium hydrogen phosphate with the NASICON structure

Ionic conductivity and phase transitions of lithium-zirconium phosphates, Li1±XZr2- XMX(PO4)3 (M = Ta, Nb, Y, Sc, In), with NASICON structure were studied using X-ray powder diffraction, calorimetry, 31P and 7Li NMR and impedance spectroscopy. Triclinic-rhombohedral phase transition in these materials occurs in a wide temperature range at coexistence of both phases. Unusual change of LiZr2(PO4)3 lattice parameters with temperature increase was found. During heating of this compound parameter “a” significantly decreases.

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Electrical conductivity, dielectric constant and phase transitions in pure and doped diammonium hydrogen phosphate

Journal of Physics Condensed Matter ◽

10.1088/0953-8984/1/35/009 ◽

1989 ◽

Vol 1 (35) ◽

pp. 6095-6103 ◽

Cited By ~ 7

Author(s):

R N Kumar ◽

C P G Vallabhan

Keyword(s):

Electrical Conductivity ◽

Dielectric Constant ◽

Phase Transitions ◽

Hydrogen Phosphate ◽

Diammonium Hydrogen Phosphate ◽

Diammonium Hydrogen

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Proton conductivity and phase transitions in 1,2,3-triazole

Physical Chemistry Chemical Physics ◽

10.1039/c5cp07603j ◽

2016 ◽

Vol 18 (8) ◽

pp. 6153-6163 ◽

Cited By ~ 13

Author(s):

Martin Pulst ◽

Jens Balko ◽

Yury Golitsyn ◽

Detlef Reichert ◽

Karsten Busse ◽

...

Keyword(s):

Phase Transitions ◽

Proton Conductivity

The contributions of proton hopping and vehicle mechanism to the intrinsic proton conductivity was investigated in crystalline and liquid 1,2,3-triazole.

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Effect of ultrasonication on the formation and properties of zirconium hydrogen phosphate HZr2(PO4)3 · nH2O with NASICON structure

Russian Journal of Inorganic Chemistry ◽

10.1134/s0036023608080019 ◽

2008 ◽

Vol 53 (8) ◽

pp. 1163-1166 ◽

Cited By ~ 2

Author(s):

I. Yu. Pinus ◽

A. E. Baranchikov ◽

A. G. Veresov ◽

A. B. Yaroslavtsev

Keyword(s):

Nasicon Structure ◽

Hydrogen Phosphate

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Electron Microscopy of Graphite Intercalation Compounds

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100055564 ◽

1982 ◽

Vol 40 ◽

pp. 544-545

Author(s):

G. Timp ◽

L. Salamanca-Riba ◽

L.W. Hobbs ◽

G. Dresselhaus ◽

M.S. Dresselhaus

Keyword(s):

Electron Microscopy ◽

Phase Transitions ◽

Domain Wall ◽

Intercalation Compounds ◽

Lattice Plane ◽

Wall Model ◽

Graphite Intercalation Compounds ◽

Fundamental Symmetry ◽

Graphite Intercalation

Electron microscopy can be used to study structures and phase transitions occurring in graphite intercalations compounds. The fundamental symmetry in graphite intercalation compounds is the staging periodicity whereby each intercalate layer is separated by n graphite layers, n denoting the stage index. The currently accepted model for intercalation proposed by Herold and Daumas assumes that the sample contains equal amounts of intercalant between any two graphite layers and staged regions are confined to domains. Specifically, in a stage 2 compound, the Herold-Daumas domain wall model predicts a pleated lattice plane structure.

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Multiple phase transitions investigated by high-speed TEM

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100175880 ◽

1990 ◽

Vol 48 (4) ◽

pp. 550-551

Author(s):

Oleg Bostanjoglo ◽

Peter Thomsen-Schmidt

Keyword(s):

Phase Transitions ◽

High Speed ◽

Short Exposure ◽

Semiconductor Film ◽

Time Resolved ◽

Short Exposure Time ◽

Multiple Phase ◽

Model Substance ◽

History Of ◽

Electron Image

Thin GexTe1-x (x = 0.15-0.8) were studied as a model substance of a composite semiconductor film, in addition being of interest for optical storage material. Two complementary modes of time-resolved TEM were used to trace the phase transitions, induced by an attached Q-switched (50 ns FWHM) and frequency doubled (532 nm) Nd:YAG laser. The laser radiation was focused onto the specimen within the TEM to a 20 μm spot (FWHM). Discrete intermediate states were visualized by short-exposure time doubleframe imaging /1,2/. The full history of a transformation was gained by tracking the electron image intensity with photomultiplier and storage oscilloscopes (space/time resolution 100 nm/3 ns) /3/. In order to avoid radiation damage by the probing electron beam to detector and specimen, the beam is pulsed in this continuous mode of time-resolved TEM,too.Short events ( <2 μs) are followed by illuminating with an extended single electron pulse (fig. 1c)

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