Mechanism of Thermal Charge Relaxation in Poled Silicate Glasses in a Wide Temperature Range (From Liquid Nitrogen to Glass Melting Temperature)

Raskhodchikov, Dmitrii; Reshetov, Ilya; Brunkov, P. N.; Kaasik, V. P.; Lipovskii, A. A.; Tagantsev, D. K.

doi:10.1021/acs.jpcb.0c04537

Cited by 8 publications

(7 citation statements)

References 61 publications

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“…As previously mentioned, the contribution to conduction of Ca 2+ is very unlikely at the poling condition studied in this work. For example, several researchers have reported activation energy of ∼2 eV and peak temperature above 400°C for Ca 2+ ions diffusion in oxide glasses, hence excluding its contribution to the observed low temperature relaxation mechanism 8,59,60 . Therefore, long‐range motion of Na + ions is the dominant contribution of P1, and the values of activation energy are found to be in good agreement with the values reported by several researchers 61,62 …”

Section: Resultssupporting

confidence: 82%

“…For example, several researchers have reported activation energy of ∼2 eV and peak temperature above 400 • C for Ca 2+ ions diffusion in oxide glasses, hence excluding its contribution to the observed low temperature relaxation mechanism. 8,59,60 Therefore, long-range motion of Na + ions is the dominant contribution of P1, and the values of activation energy are found to be in good agreement with the values reported by several researchers. 61,62 In poled SLS, the relaxation peak P1 is followed by a prominent drop in current at higher temperatures also known as high-temperature background (HTB).…”

Section: Conventional Tsdcsupporting

confidence: 89%

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Ion migration study in acid‐leached soda–lime–silica glass by thermally stimulated depolarization current analysis

et al. 2023

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Ionic conductivity in silicate glasses is a major issue in the energy sector due to its detrimental effect on electric energy generation and storage and has received increasing attention over the past years. In this study, surface modification of soda-lime-silica (SLS) float glass via acid-leaching treatment (pH 1) was implemented to understand the impact on ionic transport. The acid-leaching treatment created a sodium-depleted "silica-like" structure in the near-surface region with depths of 110 ± 20 nm for the air-side and 93 ± 2 nm for the tin-side of the SLS glass. Using the thermally stimulated depolarization current technique, two thermally activated relaxation peaks were found to be associated with different ion migration mechanisms. The first peak (P1) with activation energy of ∼0.85 eV was attributed to dc conduction of Na + ions through the glass bulk. A second overlapping peak (P2) at a higher temperature was found to be related to a more limited Na + ion migration through the acid-leached structure, due to H + conduction, or a coupled contribution of both mechanisms.

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Section: Resultssupporting

confidence: 82%

Section: Conventional Tsdcsupporting

confidence: 89%

Ion migration study in acid‐leached soda–lime–silica glass by thermally stimulated depolarization current analysis

et al. 2023

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“…A secondary heat‐treatment can lead to depoling processes in which cations drift back into the depletion layer under the force of the “frozen” electric field or diffuse due to chemical gradients 19–21 . As an example, the depoling current (as shown in Figure 4) was measured for TP0.9‐GC1 770 .…”

Section: Resultsmentioning

confidence: 99%

“…A secondary heat-treatment can lead to depoling processes in which cations drift back into the depletion layer under the force of the "frozen" electric field or diffuse due to chemical gradients. [19][20][21] As an example, the depoling current (as shown in Figure 4) was measured for TP0.9-GC1 770 . For the measurement, Pt metal sheets were used as electrodes instead of graphite due to the required temperature stability.…”

Section: Depoling During the Crystallization Heat-treatmentmentioning

confidence: 99%

Controlled surface crystallization of lithium‐zinc‐alumosilicate glass‐ceramics using thermal poling

et al. 2022

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Two glasses from the lithium-zinc-alumosilicate (LZAS) glass-ceramic system were thermally poled at 0.5 and 0.9 T g and subsequently crystallized in heat-treatment. Underneath the anode-faced surface of the as-poled glasses, a lithium depletion layer was found with layer thicknesses up to 15 μm. Between the depletion layer and the bulk, an accumulation of sodium was measured.Structural alterations underneath the anode-faced and cathode-faced surfaces of the crystallized glasses were examined using grazing-incidence X-ray diffraction and scanning electron microscopy. A mainly amorphous layer was observed on all anode-faced surfaces, each containing only small amounts of high-quartz solid solution (high-quartz s.s.). The low crystalline content was attributed to a reduced lithium content when compared to the untreated reference. Additionally, in one sample a keatite solid solution (keatite s.s.) formed in the anode-faced surface with its phase content increasing with the poling temperature. The transformation of high-quartz s.s. to keatite s.s. is facilitated by a silica-rich glass composition beneath the anode-faced surface. Underneath the cathode-faced surface high crystalline contents were obtained, which even exceed the crystalline phase contents found in the untreated reference samples. In combination with an observable larger lattice parameter of the high-quartz s.s. phase, it could be assumed that Li + cations enrich at the cathode-faced surface. The enrichment of Li + cations on the cathode-faced and their depletion on the anode-faced surface lead to different particle sizes. Small grains were observed underneath the amorphous layer in the anode-faced surface, while larger grains with an overall broader particle size distribution were found on the cathode-faced surface.

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“…Studies on the interaction mechanism of interface have a very important impact on the explanation of properties of nanocomposites. However, most studies only investigated the charge transport behavior at the interface in bulk materials through several techniques at the macro scale, such as thermal stimulation current (TSDC), broad band dielectric spectroscopy measurement, and pulsed electro-acoustic measurement [28][29][30]. Generally, the chemical and physical interfacial area between the polymer matrix and the filler is often only tens of nanometers to several micrometers [31,32].…”

Section: Introductionmentioning

confidence: 99%

Local charge transport at different interfaces in epoxy composites

Jia¹,

Zhou²,

Chen³

et al. 2022

Nanotechnology

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Charge transport in insulating composites is fundamental to designing high performance in electrical breakdown strength processes. A fundamental understanding of the charge transport at nanoscale in insulating composites remains elusive. Herein, we fabricate two types of interfaces in epoxy (EP) composites (Al2O3/EP and bubble/EP, respectively). Then the local dynamic charge mobility behavior and charge density are explored using in-situ Kelvin probe force microscopy (KPFM). After the external voltage in the horizontal direction is applied, significant differences are demonstrated in the evolution of charge transport for epoxy matrix, filler/bubble, and their interface, respectively. The interface between Al2O3 and epoxy is easier to accumulate the negative charges and introduce shallow traps. Lots of positive charges are located around a bubble where deeper traps are present and could prevent charge migration. Thus, this work offers extended experimental support to understanding the mechanism of charge transport in dielectric composites.

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Mechanism of Thermal Charge Relaxation in Poled Silicate Glasses in a Wide Temperature Range (From Liquid Nitrogen to Glass Melting Temperature)

Cited by 8 publications

References 61 publications

Ion migration study in acid‐leached soda–lime–silica glass by thermally stimulated depolarization current analysis

Ion migration study in acid‐leached soda–lime–silica glass by thermally stimulated depolarization current analysis

Controlled surface crystallization of lithium‐zinc‐alumosilicate glass‐ceramics using thermal poling

Local charge transport at different interfaces in epoxy composites

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