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SM ISO690:2012 SHARAGOV, Vasile, BURCOVSCHI, Ion. The influence of the electric fields on the intensification of dealkalization of industrial glasses with gaseous reagents. In: The International Conference dedicated to the 55th anniversary from the foundation of the Institute of Chemistry of the Academy of Sciences of Moldova, 28-30 mai 2014, Chișinău. Chișinău, Republica Moldova: Institutul de Chimie al AȘM, 2014, p. 182. |
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The International Conference dedicated to the 55th anniversary from the foundation of the Institute of Chemistry of the Academy of Sciences of Moldova 2014 | ||||||
Conferința "The International Conference dedicated to the 55th anniversary from the foundation of the Institute of Chemistry of the Academy of Sciences of Moldova" Chișinău, Moldova, 28-30 mai 2014 | ||||||
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Thermochemical treatment of glassware with gaseous reagents is the simplest method to |
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<?xml version='1.0' encoding='utf-8'?> <CERIF xmlns='urn:xmlns:org:eurocris:cerif-1.5-1' xsi:schemaLocation='urn:xmlns:org:eurocris:cerif-1.5-1 http://www.eurocris.org/Uploads/Web%20pages/CERIF-1.5/CERIF_1.5_1.xsd' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' release='1.5' date='2012-10-07' sourceDatabase='Output Profile'> <cfResPubl> <cfResPublId>ibn-ResPubl-106310</cfResPublId> <cfResPublDate>2014</cfResPublDate> <cfStartPage>182</cfStartPage> <cfISBN></cfISBN> <cfURI>https://ibn.idsi.md/ro/vizualizare_articol/106310</cfURI> <cfTitle cfLangCode='EN' cfTrans='o'>The influence of the electric fields on the intensification of dealkalization of industrial glasses with gaseous reagents</cfTitle> <cfAbstr cfLangCode='EN' cfTrans='o'><p>Thermochemical treatment of glassware with gaseous reagents is the simplest method to<br />improve the surface properties of glass. The main disadvantage of this method of treatment is the<br />low depth of dealkalization layer (about 1 m in the case of industrial glassware), so it has a<br />smaller effect in comparison to other strengthening methods i.e. ion exchange, etching in<br />hydrofluoric acid and tempering [1]. Due to the same reason, during the operation of glassware<br />their modified layers are rapidly destroyed and there is a degradation of glass strength. Hence,<br />the wide use of this method is due to the increased thickness of dealkalized layer. It is known<br />that electric, magnetic and acoustic fields significantly affect the chemical processes [2]. The<br />effect of physical fields on chemical interaction between acid gases and glass has not been<br />described in literature.<br />The aim of the undertaken experiments was to investigate the influence of electric fields<br />on the process of dealkalization of industrial glassware with gaseous reagents.<br />The subjects of investigation were various types of industrial glassware: sheet glass<br />samples, containers (bottles, jars and flasks) of colorless glass, bottles of green glass, ampoules<br />made from medical glass, illuminating glassware made from transparent colorless and milk<br />glasses, laboratory and assorted glassware. SO2, NO2, HCl, CF2Cl2, CHF2Cl and mixtures of<br />these gaseous reagents (CF2Cl2 + SO2, CHF2Cl + NO2, SO2 + HCl etc.) were used as gaseous<br />reagents.<br />The samples of glass were exposed to thermochemical treatment with gaseous reagents in<br />the electric fields both in laboratory and industrial conditions. The main regimes of<br />thermochemical treatment of glass are the following: temperature - between 300 and 600 oС,<br />duration - between 1 s and 2 h, quantity of gas reagent introduced into the reacting vessel -<br />between 0.01 and 1.00 mol, voltage value - up to 5 kV.<br />The intensity of glass dealkalization by acid gases was estimated using the extraction rate<br />of alkaline cations [3]. During the first stage of investigation we determined the rate of<br />dealkalization of industrial glasses with different gaseous reagents based on the optimal regime<br />of thermochemical treatment in laboratory conditions. In the following experiments the<br />thermochemical treatment was repeated, but under the influence of electric fields (constant and<br />alternating). We have established that the rate of dealkalization of industrial glasses with gaseous<br />reagents under the impact of electric fields has increased by 2-3 times. The results achieved may<br />be explained by the voltage value, shape, material and size of the electrodes, the distance<br />between the electrodes etc. Similar results have been obtained for industrial experiments.<br />References:<br />[1] Бутаев, А. М. Прочность стекла. Махачкала: Дагестанский государственный<br />университет, 1997, 253 с.<br />[2] Poller, S. Chemie auf dem Wege ins dritte Jahrtausend. Leipzig – Jena – Berlin: Urania –<br />Verlag, 1979, 400 p.<br />[3] Sharagov, V., Duca, Gh. Increasing physical and chemical properties of annealed hollow<br />glassware as well as of those stored and used. Romanian Journal of Materials. 2013, nr. 43<br />(2), 218-222.</p></cfAbstr> <cfResPubl_Class> <cfClassId>eda2d9e9-34c5-11e1-b86c-0800200c9a66</cfClassId> <cfClassSchemeId>759af938-34ae-11e1-b86c-0800200c9a66</cfClassSchemeId> <cfStartDate>2014T24:00:00</cfStartDate> </cfResPubl_Class> <cfResPubl_Class> <cfClassId>e601872f-4b7e-4d88-929f-7df027b226c9</cfClassId> <cfClassSchemeId>40e90e2f-446d-460a-98e5-5dce57550c48</cfClassSchemeId> <cfStartDate>2014T24:00:00</cfStartDate> </cfResPubl_Class> <cfPers_ResPubl> <cfPersId>ibn-person-12173</cfPersId> <cfClassId>49815870-1cfe-11e1-8bc2-0800200c9a66</cfClassId> <cfClassSchemeId>b7135ad0-1d00-11e1-8bc2-0800200c9a66</cfClassSchemeId> <cfStartDate>2014T24:00:00</cfStartDate> </cfPers_ResPubl> <cfPers_ResPubl> <cfPersId>ibn-person-42747</cfPersId> <cfClassId>49815870-1cfe-11e1-8bc2-0800200c9a66</cfClassId> <cfClassSchemeId>b7135ad0-1d00-11e1-8bc2-0800200c9a66</cfClassSchemeId> <cfStartDate>2014T24:00:00</cfStartDate> </cfPers_ResPubl> </cfResPubl> <cfPers> <cfPersId>ibn-Pers-12173</cfPersId> <cfPersName_Pers> <cfPersNameId>ibn-PersName-12173-3</cfPersNameId> <cfClassId>55f90543-d631-42eb-8d47-d8d9266cbb26</cfClassId> <cfClassSchemeId>7375609d-cfa6-45ce-a803-75de69abe21f</cfClassSchemeId> <cfStartDate>2014T24:00:00</cfStartDate> <cfFamilyNames>Sharagov</cfFamilyNames> <cfFirstNames>Vasile</cfFirstNames> <cfFamilyNames>Шарагов</cfFamilyNames> <cfFirstNames>Василий</cfFirstNames> </cfPersName_Pers> </cfPers> <cfPers> <cfPersId>ibn-Pers-42747</cfPersId> <cfPersName_Pers> <cfPersNameId>ibn-PersName-42747-3</cfPersNameId> <cfClassId>55f90543-d631-42eb-8d47-d8d9266cbb26</cfClassId> <cfClassSchemeId>7375609d-cfa6-45ce-a803-75de69abe21f</cfClassSchemeId> <cfStartDate>2014T24:00:00</cfStartDate> <cfFamilyNames>Бурковский</cfFamilyNames> <cfFirstNames>Ион</cfFirstNames> </cfPersName_Pers> </cfPers> </CERIF>