Proton Conduction in (NH4)HSO4 Single Crystals

Reddy, A. D.; Sathyanarayan, S. G.; Sastry, G. Sivarama

doi:10.1002/pssa.2210730145

Cited by 12 publications

(4 citation statements)

References 11 publications

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“…An Arrhenius-type activation process with an activation energy E a of 0.98–1.2 eV is observed in the temperature range between 330 and 390 K. The activation energy of the conductivity process in AHS–PG nanocomposites is larger than that obtained for the DC conductivity of bulk AHS crystals (0.58–0.8 eV) (Reddy et al 1982). …”

Section: Resultsmentioning

confidence: 98%

Phase transition in NH4HSO4–porous glasses nanocomposites

et al. 2013

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The results of investigations of porous glasses (PG) and porous glasses–ammonium hydrogen sulfate ferroelectric nanocomposites (AHS–PG) are presented. On the basis of dielectric and calorimetric measurements it was shown that in the AHS–PG nanocomposites with average pore size of 44, 68, 95, and 320 nm the anomalies of dielectric permittivity and specific heat similar to those in bulk crystals AHS are observed. An influence of the mean value of pores sizes on the ferroelectric phase transition temperatures of AHS nanocrystals embedded into the porous matrices was determined. It was shown that in AHS–PG dispersion of the dielectric permittivity is observed in both para- and ferro-electric phases and above room temperature AHS–PG nanocomposites exhibit the ionic conductivity.

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Section: Resultsmentioning

confidence: 98%

Phase transition in NH4HSO4–porous glasses nanocomposites

et al. 2013

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“…The enhancement of the low-frequency permittivity arises likely due to space charge polarization [15]. AHS is known to have the high proton mobility [16]. Therefore, the necessary excess of mobile charges can be produced by redistribution of protons and structural imperfections on the confined particle surfaces.…”

Section: Resultsmentioning

confidence: 99%

Dielectric Studies of Ammonium Hydrogen Sulphate (NH<sub>4</sub>HSO<sub>4</sub>), Embedded into Molecular Sieves SBA-15

Milinskii

Antonov

Барышников

2016

SSP

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Temperature dependencies of linear dielectric permittivity and third harmonic coefficient of nanoporous matrices SBA-15 with channel pore size of 7,5 nm filled with ferroelectric NH4HSO4 compared to bulk ammonium hydrogen sulphate were studied. The measurements were performed in a heating and cooling mode with a temperature range from 100 K to room temperature. Low-temperature phase transition shift of 7-8 degrees to low temperatures was found for nanostructured ammonium hydrogen sulphate compared to bulk NH4HSO4. The experimental data were treated within the framework of the models developed for isolated small ferroelectric particles and arrays of coupled particles. The rise of the space charge polarization effects was also observed.

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“…The NH 4 HSO 4 conductivity at atmospheric pressure was measured in several papers. Direct measurements of the gas evolution have shown that the conductivity is protonic 23 and the value of the bulk conductivity does not exceed 10 À6 Ohm À1 cm À1 though the surface conductivity in the vicinity of the melting temperature is much larger. 24 There are no superprotonic phase transitions in this compound at P ¼ 1 atm, in contrast with the above discussed CsHSO 4 .…”

Section: Melting Curvementioning

confidence: 99%

Pressure effect on phase transitions in MeHAO4 superprotonic conductors (A = S, Se and Me = NH4, Rb, Cs)

Синицын

2010

J. Mater. Chem.

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Proton Conduction in (NH4)HSO4 Single Crystals

Cited by 12 publications

References 11 publications

Phase transition in NH4HSO4–porous glasses nanocomposites

Phase transition in NH4HSO4–porous glasses nanocomposites

Dielectric Studies of Ammonium Hydrogen Sulphate (NH<sub>4</sub>HSO<sub>4</sub>), Embedded into Molecular Sieves SBA-15

Pressure effect on phase transitions in MeHAO4 superprotonic conductors (A = S, Se and Me = NH4, Rb, Cs)

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