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Effect of various atmospheres and of autoclaving on the surface texture of thermally treated strontium oxalate 不同气氛和高压灭菌对热处理草酸锶表面织构的影响
Surface Technology Pub Date : 1985-08-01 Epub Date: 2002-10-09 DOI: 10.1016/0376-4583(85)90087-1
Mohamed Abd El-Khalik, Said Hanafi, Suzy A. Selim
{"title":"Effect of various atmospheres and of autoclaving on the surface texture of thermally treated strontium oxalate","authors":"Mohamed Abd El-Khalik,&nbsp;Said Hanafi,&nbsp;Suzy A. Selim","doi":"10.1016/0376-4583(85)90087-1","DOIUrl":"10.1016/0376-4583(85)90087-1","url":null,"abstract":"<div><p>Surface area measurements were performed using nitrogen adsorption at -196 °C on strontium oxalate monohydrate and its thermal decomposition products obtained in the temperature range 400–510 °C in presence of air or water vapour at various pressures, and in an atmosphere of nitrogen, hydrogen or carbon dioxide. Strontium oxalate monohydrate autoclaved under 10 atm was also investigated after ageing, with the products of its thermal treatment in air in the temperature range 370–610 °C.</p><p>The crystal structure of strontium oxalate monohydrate is almost unaffected by autoclaving but a new phase appears after ageing. This new phase of strontium oxalate monohydrate exists in equilibrium with the corresponding established form. It is characterized by bands situated at <em>d</em> distances of 4.65 Å, 4.17 Å, 3.17 Å, 2.264 Å and 1.906 Å.</p><p>At all temperatures the surface area is a function of the variations in the solid texture imposed by the prevailing atmosphere. The presence of water vapour during thermal treatment appears to have a “cleaning” effect, removing adsorbed gases. At high temperatures the presence of a reducing atmosphere enhances the sintering process.</p><p>Pore structure analysis of all the products indicates the predominance of mesopores except in those samples treated in a nitrogen or carbon dioxide atmosphere where microporosity is completely absent.</p></div>","PeriodicalId":22037,"journal":{"name":"Surface Technology","volume":"25 4","pages":"Pages 349-362"},"PeriodicalIF":0.0,"publicationDate":"1985-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0376-4583(85)90087-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73614278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
The kinetics of silicon dioxide chemical vapour deposition II: The model of the process 二氧化硅化学气相沉积动力学II:过程模型
Surface Technology Pub Date : 1985-08-01 Epub Date: 2002-10-09 DOI: 10.1016/0376-4583(85)90083-4
Piotr B. Grabiec, Jan Przyłuski
{"title":"The kinetics of silicon dioxide chemical vapour deposition II: The model of the process","authors":"Piotr B. Grabiec,&nbsp;Jan Przyłuski","doi":"10.1016/0376-4583(85)90083-4","DOIUrl":"10.1016/0376-4583(85)90083-4","url":null,"abstract":"<div><p>This paper presents a general analysis of chemical vapour deposition (CVD) of silicon dioxide by oxidizing silane with oxygen. The proposed model is based on the scheme of surface reactions described in Part I. The model considers all the important process steps, namely mass transport in the gas phase, adsorption and chemical reactions. The proposed approach makes it possible to analyse the kinetics of the process for a wide range of parameters. However, the resulting equation is complicated and includes some unknown coefficients. In a Part III these coefficients will be determined by fitting the model to the experimental data and the experimental verification of the model will be presented.</p></div>","PeriodicalId":22037,"journal":{"name":"Surface Technology","volume":"25 4","pages":"Pages 315-325"},"PeriodicalIF":0.0,"publicationDate":"1985-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0376-4583(85)90083-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76628780","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
High copper dental amalgams: Comparative study of the structure and the in vitro corrosion resistance 高铜牙用汞合金:结构与体外耐蚀性的比较研究
Surface Technology Pub Date : 1985-08-01 DOI: 10.1016/0376-4583(85)90091-3
E. Angelini, F. Zucchi
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引用次数: 2
Étude Des Impuretés Du Noir D'Acétyléne II: Étude Des Propriétés De Surface 乙炔黑II杂质的研究:表面性质的研究
Surface Technology Pub Date : 1985-08-01 Epub Date: 2002-10-09 DOI: 10.1016/0376-4583(85)90086-X
F. Tedjar, Z. Dib
{"title":"Étude Des Impuretés Du Noir D'Acétyléne II: Étude Des Propriétés De Surface","authors":"F. Tedjar,&nbsp;Z. Dib","doi":"10.1016/0376-4583(85)90086-X","DOIUrl":"10.1016/0376-4583(85)90086-X","url":null,"abstract":"<div><p>The surface properties of black acetylene which had undergone preliminary treatment were studied. The results seem to show a relation between the surface behaviour and the preliminary treatment of the sample.</p></div>","PeriodicalId":22037,"journal":{"name":"Surface Technology","volume":"25 4","pages":"Pages 343-348"},"PeriodicalIF":0.0,"publicationDate":"1985-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0376-4583(85)90086-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90561885","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Preparation of zinc trifluoromethanesulphonate and its properties 三氟甲磺酸锌的制备及其性能研究
Surface Technology Pub Date : 1985-08-01 Epub Date: 2002-10-09 DOI: 10.1016/0376-4583(85)90089-5
Tatsuko Takei
{"title":"Preparation of zinc trifluoromethanesulphonate and its properties","authors":"Tatsuko Takei","doi":"10.1016/0376-4583(85)90089-5","DOIUrl":"10.1016/0376-4583(85)90089-5","url":null,"abstract":"<div><p>Zinc trifluoromethanesulphonate (Zn(CF<sub>3</sub>SO<sub>3</sub>)<sub>2</sub>) was prepared. Its purity was better than 98.7%. The zinc salt did not decompose below 600 °C. It was soluble in 100 g of methanol, ethanol, acetonitrile, <em>N,N</em>-dimethyl formamide and formamide at 25 °C in amounts of 117 g, 63.9 g, 71.8 g, 42.7 g and 29.8 g respectively. A maximum conductivity of 300 μS cm<sup>-1</sup> was observed in methanol solution. The molar conductivity at 45 °C at infinite dilution was 132 ω<sup>-1</sup> cm<sup>2</sup> mol<sup>-1</sup> for methanol solution, 147 ω<sup>-1</sup> cm<sup>2</sup> mol<sup>-1</sup> for <em>N,N</em>-dimethylformamide solution, 20.5 ω<sup>-1</sup> cm<sup>2</sup> mol<sup>-1</sup> for ethanol solution, 80 ω<sup>-1</sup> cm<sup>2</sup> mol<sup>-1</sup> formamide solution and 137 ω<sup>-1</sup> cm<sup>2</sup> mol<sup>-1</sup> for acetonitrile solution.</p></div>","PeriodicalId":22037,"journal":{"name":"Surface Technology","volume":"25 4","pages":"Pages 369-375"},"PeriodicalIF":0.0,"publicationDate":"1985-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0376-4583(85)90089-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"93587624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
High copper dental amalgams: Comparative study of the structure and the in vitro corrosion resistance 高铜牙用汞合金:结构与体外耐蚀性的比较研究
Surface Technology Pub Date : 1985-08-01 Epub Date: 2002-10-09 DOI: 10.1016/0376-4583(85)90091-3
Emma Angelini, Fabrizio Zucchi
{"title":"High copper dental amalgams: Comparative study of the structure and the in vitro corrosion resistance","authors":"Emma Angelini,&nbsp;Fabrizio Zucchi","doi":"10.1016/0376-4583(85)90091-3","DOIUrl":"https://doi.org/10.1016/0376-4583(85)90091-3","url":null,"abstract":"<div><p>A dental amalgam made from a lathe-cut powder with a high copper content was characterized with respect to its microstructure by means of scanning electron microscopy techniques. A comparison was made between the <em>in vitro</em> corrosion resistance of this relatively new high copper amalgam, a dispersion-type amalgam and a ‘single composition alloy’ amalgam. The effect of toothbrushing was included to avoid the superficial accumulation of corrosion products. Electrochemical data on the behaviour of the three types of high copper amalgams examined were collected by tracing anodic polarization curves and by measuring the polarization resistance. After immersion in synthetic saliva for 30 days, the amalgam made from the lathe-cut powder with high copper content and the dispersion-type amalgam showed preferential attack on the copper-rich phases, while the γ<sub>1</sub> phase appeared only slightly altered; corrosion products rich in tin and chlorine were detected. The ‘single composition alloy’ corroded to a lesser extent.</p></div>","PeriodicalId":22037,"journal":{"name":"Surface Technology","volume":"25 4","pages":"Pages 385-396"},"PeriodicalIF":0.0,"publicationDate":"1985-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0376-4583(85)90091-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91621132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Photoelectrochemical characterization of n-CuInSe2 films prepared by quasi-rheotaxy 准流变法制备n-CuInSe2薄膜的光电化学表征
Surface Technology Pub Date : 1985-08-01 Epub Date: 2002-10-09 DOI: 10.1016/0376-4583(85)90084-6
L.Peraldo Bicelli, G. Razzini, N. Romeo , V. Canevari
{"title":"Photoelectrochemical characterization of n-CuInSe2 films prepared by quasi-rheotaxy","authors":"L.Peraldo Bicelli,&nbsp;G. Razzini,&nbsp;N. Romeo ,&nbsp;V. Canevari","doi":"10.1016/0376-4583(85)90084-6","DOIUrl":"10.1016/0376-4583(85)90084-6","url":null,"abstract":"<div><p>This is a preliminary study on the behaviour in regenerative photoelectrochemical cells of large-grained polycrystalline n-CuInSe<sub>2</sub> films prepared by a new technique consisting in depositing the semiconducting material on thin metal layers kept at a temperature close to, but lower than, their melting point. After characterization of the surface morphology of the films by scanning electron microscopy and by systematic scanning laser spot analysis, their output power characteristics when in contact with different redox couples have been examined. The results are discussed and further developments of the research outlined.</p></div>","PeriodicalId":22037,"journal":{"name":"Surface Technology","volume":"25 4","pages":"Pages 327-334"},"PeriodicalIF":0.0,"publicationDate":"1985-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0376-4583(85)90084-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85531188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Fundamental aspects of plating technology V: The effect of strongly adsorbed species on the morphology of metal deposits 电镀技术的基本方面V:强吸附物质对金属镀层形貌的影响
Surface Technology Pub Date : 1985-07-01 Epub Date: 2002-10-09 DOI: 10.1016/0376-4583(85)90137-2
K.I. Popov, Z.P. Rodaljević, N.V. Krstajić, S.D. Novaković
{"title":"Fundamental aspects of plating technology V: The effect of strongly adsorbed species on the morphology of metal deposits","authors":"K.I. Popov,&nbsp;Z.P. Rodaljević,&nbsp;N.V. Krstajić,&nbsp;S.D. Novaković","doi":"10.1016/0376-4583(85)90137-2","DOIUrl":"10.1016/0376-4583(85)90137-2","url":null,"abstract":"<div><p>It is shown that the improvement in the quality of electrodeposits obtained from CdSO<sub>4</sub> solution in the presence of strongly adsorbed species compared with that of deposits obtained in the absence of such species is due to a decrease in the exchange current density and an increase in the Tafel slope for the deposition process in the former case.</p></div>","PeriodicalId":22037,"journal":{"name":"Surface Technology","volume":"25 3","pages":"Pages 217-222"},"PeriodicalIF":0.0,"publicationDate":"1985-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0376-4583(85)90137-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87850777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 9
A.c. corrosion of delta-52 steel in K2SO4 solutions δ -52钢在K2SO4溶液中的交流腐蚀
Surface Technology Pub Date : 1985-07-01 Epub Date: 2002-10-09 DOI: 10.1016/0376-4583(85)90138-4
S.S. Abd El Rehim
{"title":"A.c. corrosion of delta-52 steel in K2SO4 solutions","authors":"S.S. Abd El Rehim","doi":"10.1016/0376-4583(85)90138-4","DOIUrl":"10.1016/0376-4583(85)90138-4","url":null,"abstract":"<div><p>The effect of a sinusoidal alternating current (a.c.) on the corrosion of Delta-52 steel in K<sub>2</sub>SO<sub>4</sub> solutions was investigated. The data reveal that on applying a.c. the corrosion rate increases. The corrosion rate also increases with increasing a.c. density. This behaviour can be interpreted in terms of the effect of a.c. on the anodic and cathodic polarization and consequently on the rate of the electrode processes. A potentiodynamic anodic potential scan of the steel electrode was performed under the influence of superimposed a.c. The results show that the dissolution current density is enhanced and the corrosion potential is shifted to more active values. This effect decreases at higher a.c. frequencies.</p></div>","PeriodicalId":22037,"journal":{"name":"Surface Technology","volume":"25 3","pages":"Pages 223-228"},"PeriodicalIF":0.0,"publicationDate":"1985-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0376-4583(85)90138-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88425698","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
Digital techniques in electrochemistry 电化学中的数字技术
Surface Technology Pub Date : 1985-07-01 Epub Date: 2002-10-09 DOI: 10.1016/0376-4583(85)90136-0
A.J.S. McNeil, P.J. Mitchell
{"title":"Digital techniques in electrochemistry","authors":"A.J.S. McNeil,&nbsp;P.J. Mitchell","doi":"10.1016/0376-4583(85)90136-0","DOIUrl":"10.1016/0376-4583(85)90136-0","url":null,"abstract":"<div><p>The recent literature on the application of digital techniques to electrochemical and electrode kinetic studies is reviewed. The principles of operation of a technical microcomputer are described, and are illustrated with examples from electrode kinetic studies in the field of electrochemical energy conversion.</p></div>","PeriodicalId":22037,"journal":{"name":"Surface Technology","volume":"25 3","pages":"Pages 195-215"},"PeriodicalIF":0.0,"publicationDate":"1985-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0376-4583(85)90136-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87655249","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 3
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