发布求助
文献互助 智能选刊 最新文献

Materials Chemistry最新文献

筛选
英文 中文
Raman spectra and structure of GeAsS glasses in the S-rich region 富s区GeAsS玻璃的拉曼光谱与结构
Materials Chemistry Pub Date : 1982-07-01 DOI: 10.1016/0390-6035(82)90091-8
M. Pisarčik, L. Koudelka
{"title":"Raman spectra and structure of GeAsS glasses in the S-rich region","authors":"M. Pisarčik, L. Koudelka","doi":"10.1016/0390-6035(82)90091-8","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90091-8","url":null,"abstract":"","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"11 1","pages":"499-507"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72851736","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: 23
Intergrowths of oxygen defect perovskite layers and SrO layers: Electron transport properties of the oxides: La2−xA1+xCu2O6−x/2+σ (A = Ca, Sr) 氧缺陷钙钛矿层和SrO层的相互生长：氧化物的电子输运性质：La2−xA1+xCu2O6−x/2+σ（A=Ca，Sr）
Materials Chemistry Pub Date : 1982-05-01 DOI: 10.1016/0390-6035(82)90018-9
N. Nguyen, C. Michel, F. Studer, B. Raveau
{"title":"Intergrowths of oxygen defect perovskite layers and SrO layers: Electron transport properties of the oxides: La2−xA1+xCu2O6−x/2+σ (A = Ca, Sr)","authors":"N. Nguyen,&nbsp;C. Michel,&nbsp;F. Studer,&nbsp;B. Raveau","doi":"10.1016/0390-6035(82)90018-9","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90018-9","url":null,"abstract":"<div><p>The conductivity, Seebeck effect and magnetic susceptibility of the oxides La<sub>2−x</sub>A<sub>1+x</sub>Cu<sub>2</sub>O<sub>6−x/2+<em>σ</em></sub> (A = Ca, Sr) have been investigated. These compounds which contain variable amounts of trivalent copper are characterized by a hole conduction. A progressive evolution of the electron transport properties from a semi-conductor to a semi-metal is observed according to the amount of Cu<sup>3+</sup>. These properties are interpreted in terms of a Mott band model. The influence of the oxygen pressure during the electrical measurements is also considered.</p></div>","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"7 3","pages":"Pages 413-427"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-6035(82)90018-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72077021","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: 28
Degradation of poly(vinyl chloride) during extrusion in a capillary rheometer 毛细管流变仪中聚氯乙烯在挤出过程中的降解
Materials Chemistry Pub Date : 1982-05-01 DOI: 10.1016/0390-6035(82)90014-1
A. Santamaria, G.M. Guzmán, J.J. Peña
{"title":"Degradation of poly(vinyl chloride) during extrusion in a capillary rheometer","authors":"A. Santamaria,&nbsp;G.M. Guzmán,&nbsp;J.J. Peña","doi":"10.1016/0390-6035(82)90014-1","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90014-1","url":null,"abstract":"<div><p>A study of thermal degradation of Poly(vinyl chloride) commercial samples is made by means of extrusion capillary rheometer.</p><p>Samples are degradated under different conditions of temperature and shear stress. The influence of variables as molecular weight, particle size, stabilizer and shear rate is studied, obtaining results in agreement with general data in literature.</p><p>Other techniques as intrinsic viscosity measurements and infrared spectroscopy are also employed.</p><p>It is seen that the higher the melt viscosity of the sample, the more stable it is.</p></div>","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"7 3","pages":"Pages 347-357"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-6035(82)90014-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72077023","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
The nature of surface chemical heterogeneities of graphitized carbon black 石墨化炭黑表面化学不均匀性的性质
Materials Chemistry Pub Date : 1982-05-01 DOI: 10.1016/0390-6035(82)90019-0
L. Campanella , A. Di Corcia , R. Samperi , A. Gambacorta
{"title":"The nature of surface chemical heterogeneities of graphitized carbon black","authors":"L. Campanella ,&nbsp;A. Di Corcia ,&nbsp;R. Samperi ,&nbsp;A. Gambacorta","doi":"10.1016/0390-6035(82)90019-0","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90019-0","url":null,"abstract":"<div><p>Experimental evidence is presented for the existence of quinone, aromatic ether, carboxylic acid and phenol groups on the surface of a graphitized carbon black (GCB), that is P-33 (2700°C). This evidence has been achieved by using polarographic analysis of a slurry of GCB particles.</p><p>Polarographic analysis has been also performed for ungraphitized P-33.</p><p>By comparison, it appears that the heating at 2700°C does not remarkably change the nature and the amount of chemical groups chemically bound to the surface of the carbon black.</p></div>","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"7 3","pages":"Pages 429-438"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-6035(82)90019-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72123563","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: 25
Manganese dioxide in dry cell electrodes 干电池电极中的二氧化锰
Materials Chemistry Pub Date : 1982-05-01 DOI: 10.1016/0390-6035(82)90011-6
K. Euler
{"title":"Manganese dioxide in dry cell electrodes","authors":"K. Euler","doi":"10.1016/0390-6035(82)90011-6","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90011-6","url":null,"abstract":"","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"89 1","pages":"291-311"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84279733","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
Intergrowths of oxygen defect perovskite layers and SrO layers: Electron transport properties of the oxides: La2−xA1+xCu2O6−x/2+σ (A = Ca, Sr) 氧缺陷钙钛矿层与SrO层的互生:氧化物La2−xA1+xCu2O6−x/2+σ (A = Ca, Sr)的电子输运性质
Materials Chemistry Pub Date : 1982-05-01 DOI: 10.1016/0390-6035(82)90018-9
N. Nguyen, C. Michel, F. Studer, B. Raveau
{"title":"Intergrowths of oxygen defect perovskite layers and SrO layers: Electron transport properties of the oxides: La2−xA1+xCu2O6−x/2+σ (A = Ca, Sr)","authors":"N. Nguyen, C. Michel, F. Studer, B. Raveau","doi":"10.1016/0390-6035(82)90018-9","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90018-9","url":null,"abstract":"","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"288 1","pages":"413-427"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88665953","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: 28
E.S.R. and optical study of VO2+ in lithium zinc-phosphate glasses 磷酸锌锂玻璃中VO2+的E.S.R.和光学研究
Materials Chemistry Pub Date : 1982-05-01 DOI: 10.1016/0390-6035(82)90016-5
F. Momo, A. Sotgiu
{"title":"E.S.R. and optical study of VO2+ in lithium zinc-phosphate glasses","authors":"F. Momo,&nbsp;A. Sotgiu","doi":"10.1016/0390-6035(82)90016-5","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90016-5","url":null,"abstract":"<div><p>The E.S.R. and optical spectra of glasses of basic composition 30% Li<sub>2</sub> O-30% ZnO-40% P<sub>2</sub> O<sub>5</sub> doped with vanadium have been studied.</p><p>The partial substitution of ZnO with Al<sub>2</sub>O<sub>3</sub> and PbO has a great effect on the chemical durability of the glasses but does not affect their magnetic and optical properties.</p><p>The E.S.R. and optical data suggest that the dxy orbital of the umpaired spin of the V(IV) specie is not bonded with the π orbitals of the in plane ligands while there is a strong σ bonding with the same ligands. The bonding between the vanadium and the vanadyl oxygen is only slightly covalent. The E.S.R. spectra show a large reduction of the line-width when the concentration of the V<sub>2</sub>O<sub>5</sub> goes from 1% to 0.1% showing that the dipolar broadening gives the larger contribution to the E.S.R. line-width.</p></div>","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"7 3","pages":"Pages 395-402"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-6035(82)90016-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72123561","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
Oxide film thickening on the surface of iron-chromium alloys in relation to anion type and concentration 铁铬合金表面氧化膜增厚与阴离子类型和浓度的关系
Materials Chemistry Pub Date : 1982-05-01 DOI: 10.1016/0390-6035(82)90012-8
J. Kader, F. Wahab, M. Khedr, A. Din
{"title":"Oxide film thickening on the surface of iron-chromium alloys in relation to anion type and concentration","authors":"J. Kader, F. Wahab, M. Khedr, A. Din","doi":"10.1016/0390-6035(82)90012-8","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90012-8","url":null,"abstract":"","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"24 1","pages":"313-329"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74605443","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: 6
Oxidation of methanol on the surfaces of copper-silver alloys 甲醇在铜银合金表面的氧化
Materials Chemistry Pub Date : 1982-05-01 DOI: 10.1016/0390-6035(82)90013-X
D. Lazarov , St. Manev , K. Ivanov
{"title":"Oxidation of methanol on the surfaces of copper-silver alloys","authors":"D. Lazarov ,&nbsp;St. Manev ,&nbsp;K. Ivanov","doi":"10.1016/0390-6035(82)90013-X","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90013-X","url":null,"abstract":"<div><p>The catalytic oxidation of methanol on copper, silver and copper - silver alloys has been studied in a large range of temperature changes, alloy compositions, reaction gas mixture compositions and flow rates. A reaction mechanism is proposed and the reaction conditions providing for highest catalytic activity and selectivity are outlined. It is possible using the scheme, to explain why copper is not so suitable as a catalyst as silver. A correlation has been established between the phase diagram of the bimetallic copper-silver system and its catalytic activity. Some copper-silver alloys prove suitable to be used as industrial catalysts for the oxidation of methanol to formaldehyde.</p></div>","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"7 3","pages":"Pages 331-346"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-6035(82)90013-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72077019","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
Kinetic study of phenol nitrosation in protic and aprotic solvents 苯酚在质子和非质子溶剂中的亚硝化动力学研究
Materials Chemistry Pub Date : 1982-05-01 DOI: 10.1016/0390-6035(82)90017-7
S. Pérez G., G. Pieza R., E. Vázquez F., C. Pérez G.
{"title":"Kinetic study of phenol nitrosation in protic and aprotic solvents","authors":"S. Pérez G.,&nbsp;G. Pieza R.,&nbsp;E. Vázquez F.,&nbsp;C. Pérez G.","doi":"10.1016/0390-6035(82)90017-7","DOIUrl":"https://doi.org/10.1016/0390-6035(82)90017-7","url":null,"abstract":"<div><p>The specific constants of the phenol nitrosation reaction were determined over a temperature range of 0°C to 40°C in the following solvents: water, ethanol, dimethylsulfoxide, acetonitrile, chloroform, benzene and cyclohexane. The influence of several strong electrolytes on the nitrosation rate in aqueous media was studied in the presence of a strong acid, 0.1 N, HCl, and without it. The magnitude of the primary isotopic effect which is produced in protic and aprotic solvents was also investigated. On the basis of an analysis of the yields and from the reaction kinetics found in this work we propose a nitrosation reaction mechanism in aprotic solvents. The nitrosonium ion plays no role in the mechanism.</p></div>","PeriodicalId":18221,"journal":{"name":"Materials Chemistry","volume":"7 3","pages":"Pages 403-411"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-6035(82)90017-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72077020","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
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信