Crystal Engineering最新文献_第7页

Structural characterization of sol-gel lanthanum cobaltite thin films 溶胶-凝胶钴酸镧薄膜的结构表征

Crystal Engineering Pub Date : 2002-09-01 DOI: 10.1016/S1463-0184(02)00040-0

E Bontempi , L Armelao , D Barreca , L Bertolo , G Bottaro , E Pierangelo , L.E Depero

引用次数: 23

Orientation imaging microscopy applied to BaTiO3 ceramics 取向成像显微镜在BaTiO3陶瓷中的应用

Crystal Engineering Pub Date : 2002-09-01 DOI: 10.1016/S1463-0184(02)00034-5

A Koblischka-Veneva, F Mücklich

引用次数: 12

Influence of structural factor on corrosion rate of functional Zn–Ni coatings 结构因素对功能Zn-Ni镀层腐蚀速率的影响

Crystal Engineering Pub Date : 2002-09-01 DOI: 10.1016/S1463-0184(02)00045-X

E. Beltowska-Lehman , P. Ozga , Z. Swiatek , C. Lupi

{"title":"Influence of structural factor on corrosion rate of functional Zn–Ni coatings","authors":"E. Beltowska-Lehman , P. Ozga , Z. Swiatek , C. Lupi","doi":"10.1016/S1463-0184(02)00045-X","DOIUrl":"10.1016/S1463-0184(02)00045-X","url":null,"abstract":"<div>The electrocrystallization processes of Zn–Ni coatings from weakly acid sulfate solutions with the addition of citrate and acetate complexing compounds have been compared. The deposition kinetics and the influence of electrolyte composition on the Zn–Ni alloy composition and on some physicochemical properties (corrosion resistance, texture, phase composition, morphology) were determined. It was found that the properties of coatings obtained under the same operating conditions in electrolytes with the same [Ni(II)]/[Zn(II)] concentration ratio and pH but containing different complexing agents were different. The composition of the deposits and their texture as well as phase structure were found to depend on the complexing species present. Coatings deposited from acetate solutions are richer in Ni than those from citrate solutions. The corrosion resistance of a Zn–Ni alloy depends in practice on the percentage of Ni, but in sulfate–citrate electrolytes, layers containing less Ni were obtained with the same corrosion resistance as Ni-rich coatings deposited from acetate solution. The corrosion current decreases more rapidly with increasing Ni content. This effect is connected mainly with phase composition. In citrate solutions practically single-phase (hexagonal η) deposits were obtained which provide better protection with a lower corrosion rate in comparison with alloys consisting of three phases (hexagonal η, monoclinic δ, regular γ) deposited from acetate baths.</div>","PeriodicalId":10766,"journal":{"name":"Crystal Engineering","volume":"5 3","pages":"Pages 335-345"},"PeriodicalIF":0.0,"publicationDate":"2002-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1463-0184(02)00045-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73434309","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: 22

Kinetics studies for the formation of Tl-1223 films prepared by spray pyrolysis 喷雾热解法制备Tl-1223薄膜的动力学研究

Crystal Engineering Pub Date : 2002-09-01 DOI: 10.1016/S1463-0184(02)00051-5

S Phok , Ph Galez , J.L Jorda , D De-Barros , C Villard , F Weiss

{"title":"Kinetics studies for the formation of Tl-1223 films prepared by spray pyrolysis","authors":"S Phok , Ph Galez , J.L Jorda , D De-Barros , C Villard , F Weiss","doi":"10.1016/S1463-0184(02)00051-5","DOIUrl":"10.1016/S1463-0184(02)00051-5","url":null,"abstract":"<div>TlBa2Ca2Cu3O9 (Tl-1223) superconducting thick films with Jc as high as 0.8 MA/cm2 have been recently prepared in a two step process which involves (i) the deposition of the “Ba2Ca2Cu3O7” precursor on heated LaAlO3 substrates by spray pyrolysis and (ii) an ex-situ thallination treatment, following a procedure already applied for bulk samples. The kinetics for the formation of the superconducting phase has been studied to determine the optimum processing temperature and time for better control of the grain growth and the superconducting properties. The data analysis, based on a diffusion model, leads to an estimated value for the activation energy Ea of 161 kJ/mol. The effect of fluorine addition on the film morphology and microstructure is also studied. It is found that both c-axis orientation (Δω = 0.34°) and in-plane texture (Δϕ =0.43°) are significantly improved with respect to F-free films.</div>","PeriodicalId":10766,"journal":{"name":"Crystal Engineering","volume":"5 3","pages":"Pages 401-410"},"PeriodicalIF":0.0,"publicationDate":"2002-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1463-0184(02)00051-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79536977","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: 5

Studies in the BaO2–BaO–CuO system 保-保-错系统的研究

Crystal Engineering Pub Date : 2002-09-01 DOI: 10.1016/S1463-0184(02)00053-9

J.L. Jondo, S. Phok, Ph. Galez, J.-L. Jorda

引用次数: 6

Structure maps for crystal engineering 晶体工程结构图

Crystal Engineering Pub Date : 2002-06-01 DOI: 10.1016/S1463-0184(02)00012-6

J. Hauck, K. Mika

引用次数: 8

Structure of M(18-crown-6)+ (M=T1, NH4) oximate complexes: effective control of the molecular geometry employing a crystal engineering approach M(18-冠-6)+ (M=T1, NH4)肟配合物的结构:利用晶体工程方法对分子几何结构的有效控制

Crystal Engineering Pub Date : 2002-06-01 DOI: 10.1016/S1463-0184(02)00009-6

Vira Ponomarova, K. V. Domasevitch

引用次数: 10

Structure of M(18-crown-6)+ (M=T1, NH4) oximate complexes: effective control of the molecular geometry employing a crystal engineering approach M（18-冠-6）+（M=T1，NH4）肟配合物的结构：用晶体工程方法有效控制分子几何结构

Crystal Engineering Pub Date : 2002-06-01 DOI: 10.1016/S1463-0184(02)00009-6

Vira V. Ponomarova, Konstantin V. Domasevitch

引用次数: 10

Hydrogen bonded perrhenate-azoimidazoles 氢键过氯酸-偶氮咪唑

Crystal Engineering Pub Date : 2002-06-01 DOI: 10.1016/S1463-0184(02)00013-8

Umasankar Ray, G. Mostafa, T. Lu, C. Sinha

引用次数: 14

The hydrogen-bonding networks of 2-amino-4-phenyl-1,3-thiazole derivatives 2-氨基-4-苯基-1,3-噻唑衍生物的氢键网络

Crystal Engineering Pub Date : 2002-06-01 DOI: 10.1016/S1463-0184(02)00011-4

Daniel E. Lynch , Ian McClenaghan , Mark E. Light , Simon J. Coles

{"title":"The hydrogen-bonding networks of 2-amino-4-phenyl-1,3-thiazole derivatives","authors":"Daniel E. Lynch , Ian McClenaghan , Mark E. Light , Simon J. Coles","doi":"10.1016/S1463-0184(02)00011-4","DOIUrl":"10.1016/S1463-0184(02)00011-4","url":null,"abstract":"<div>The solid-state packing arrays of nine 4-phenyl substituted 2-amino-1,3-thiazoles have been examined and their hydrogen-bonding networks discussed. The nine compounds, in addition to 2-amino-1,3-thiazole 1, were 2-amino-4-phenyl-1,3-thiazole 2, 2-amino-4-phenyl-1,3-thiazolium bromide monohydrate 3, ethyl 2-amino-4-phenyl-1,3-thiazole-5-carboxylate 4, 2-amino-4-(3-coumarin)-1,3-thiazole 5, 2-amino-4-(4-methylphenyl)-1,3-thiazole 6, 2-amino-4-(2-hydroxyphenyl)-1,3-thiazole 7, 2-amino-4-(4-bisphenyl)-1,3-thiazole 8, 2-amino-4-(1-naphthyl)-1,3-thiazole 9, and 2-amino-4-(2-naphthyl)-1,3-thiazolium bromide 10. The single-crystal x-ray structures of 1–5 have been previously reported while the structures of 6–10 are presented in this paper. A variety of different packing motifs are observed with only four (4, 5, 6 and 9) exhibiting the characteristic R22(8) hydrogen-bonded 2-amino-1,3-thiazole dimers. In two of these four structures (6 and 9) potential N–H⋯π hydrogen-bonding interactions exist whereas all remaining structures exhibit a combination of N–H⋯N with either N–H⋯O, N–H⋯S or N–H⋯Br associations in their hydrogen-bonding networks.</div>","PeriodicalId":10766,"journal":{"name":"Crystal Engineering","volume":"5 2","pages":"Pages 123-136"},"PeriodicalIF":0.0,"publicationDate":"2002-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1463-0184(02)00011-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91151719","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: 10