Electric field distribution and near-surface modifications in soda-lime glass submitted to a dc potential

Lepienski, C.M.; Giacometti, J.A.; Ferreira, G.F. Leal; Freire, F.L.; Achete, C. A.

doi:10.1016/0022-3093(93)90224-l

Cited by 88 publications

(81 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For conventional alkali-silicate glasses this temperature is about 250-300°C that is essentially below their glass transition temperature, and the voltage is about several hundreds volts [1,2]. In the case of coronapoling [3,4] the voltage is an order of magnitude higher because of a gap between the glass plate and the anodic electrode, where corona discharge occurs.…”

Section: Introductionmentioning

confidence: 97%

Nanoprofiling of alkali-silicate glasses by thermal poling

Redkov

Melehin

Statcenko

et al. 2015

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 97%

Nanoprofiling of alkali-silicate glasses by thermal poling

Redkov

Melehin

Statcenko

et al. 2015

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

“…The formation of the cation depleted layer in silicate glasses containing alkalis, due to thermal poling, have been the focal point of several papers. [2][3][4][5][6] The aim of the present work is to join supplementary information about the chemical and structural changes in the anodic surface of poled soda-lime silica glass, which might be helpful in clarifying the several observed physicochemical features that have been related to the formed depletion layer. The present work examines the compositional and structural changes in the anodic face of float glass samples submitted to different poling conditions.…”

Section: Introductionmentioning

confidence: 99%

Compositional and structural changes at the anodic surface of thermally poled soda-lime float glass

Ziemath¹,

Araújo²,

Escanhoela³

2008

Journal of Applied Physics

View full text Add to dashboard Cite

Applying high dc electric fields at elevated temperatures on silicate glasses results in displacement of ions, causing compositional and structural changes in the anodic surface. In this work, the ionic displacement was accompanied by electric current measurements during poling. The thickness of the Na + depletion layer calculated from the current curves agrees with the thickness measured by EDS only if displacement of Ca 2+ and O − are also taken into account. A depletion of Ca 2+ in the anodic surface has in fact been observed. Structural changes were confirmed by infrared diffuse and specular reflectance spectroscopies. A narrowing of the band at about 1070 cm −1 can be attributed to an increase in the structural ordering degree. Refractive index measurements confirm compositional changes and contact angle measurements indicate the existence of a negative charge density at the anodic surface.

show abstract

“…[1][2][3][4] In recent years, interest in this technique has expanded beyond SONL to enhance a variety of biological, physical and chemical properties of glass. [5][6][7][8][9][10][11][12][13][14][15][16][17][18] For example, electro-thermal poling has been reported to modify a glass' affinity to atmospheric water at the anode region. 18 Electro-thermal poling generally comprises of four main processing steps.…”

mentioning

confidence: 99%

Depletion Layer Formation in Alkali Silicate Glasses by Electro-Thermal Poling

McLaren

Balabajew

Gellert

et al. 2016

J. Electrochem. Soc.

View full text Add to dashboard Cite

Electro-thermal poling of alkali-containing glasses has been known to enhance various physical and chemical properties due to the formation of an alkali ion depletion layer. We have investigated the role of alkali ion migration in depletion layer formation by in situ impedance spectroscopy, poling current measurements and ToF-SIMS on two binary alkali (lithium and sodium) disilicate glasses and two mixed alkali lithium-sodium disilicate glasses. Typically, the depletion layer is formed within a few minutes, reaching a thickness of the order of 100 nm while its impedance continues to increase for the duration of poling. Its electrical conductivity is six or more orders of magnitude lower than that of the bulk glass; by comparison the dielectric constant is lower, approaching the value for silica containing a few percent alkali oxide. Two processes contribute to the formation of a depletion layer: a relatively fast initial process arising from alkali ion migration, followed by a slower process of either electrolysis or gaseous oxygen evolution near the anode. Implications of electro-thermal poling for the mechanism of recently discovered electric field-induced softening of glass are discussed. Electro-thermal poling was primarily developed to induce secondorder nonlinear (SONL) optical susceptibility in glasses by application of DC electric fields. [1][2][3][4] In recent years, interest in this technique has expanded beyond SONL to enhance a variety of biological, physical and chemical properties of glass.5-18 For example, electro-thermal poling has been reported to modify a glass' affinity to atmospheric water at the anode region.18 Electro-thermal poling generally comprises of four main processing steps. First, a glass is heated to a predetermined poling temperature (T p ) below the glass transition temperature (T g ), which allows for increased ionic conductivity while retaining the preformed dimensions. Electrodes on opposite sides of the glass sample are then used to apply a DC voltage (V p ) at T p . After sufficient charge flow has occurred, the glass is then cooled to ambient while still applying the DC voltage to 'freeze' ionic displacements. Finally, the applied voltage is removed at ambient temperature where ionic conductivity is significantly lower to prevent ionic migration back toward original positions. Modification of properties is largely effected by the formation of an alkali ion depletion layer at the anode due to charge transport of ions during these steps.Recently, electric field-induced softening (EFIS) of glass was reported to reduce furnace temperature required for glass softening. 19EFIS is a processing technique where a compressive load is applied to a rectangular glass block inside a furnace. The furnace is then heated at a constant rate while electrodes are used to apply an external electric field across the two parallel faces of the block. The observed reduction in furnace temperature, compared to zero-field conditions, occurs as a result of Joule heating, electrolysis and dielectric b...

show abstract

Electric field distribution and near-surface modifications in soda-lime glass submitted to a dc potential

Cited by 88 publications

References 14 publications

Nanoprofiling of alkali-silicate glasses by thermal poling

Nanoprofiling of alkali-silicate glasses by thermal poling

Compositional and structural changes at the anodic surface of thermally poled soda-lime float glass

Depletion Layer Formation in Alkali Silicate Glasses by Electro-Thermal Poling

Contact Info

Product

Resources

About