International Journal of Inorganic Materials最新文献_第8页

Crystal growth of praseodymium molybdate by gel method 凝胶法制备钼酸镨晶体生长

International Journal of Inorganic Materials Pub Date : 2001-11-01 DOI: 10.1016/S1466-6049(01)00192-1

Sanjay Pandita , Vinay Hangloo , K.K. Bamzai , P.N. Kotru , Neera Sahni

引用次数: 6

Influence of particle size on the antibacterial activity of zinc oxide 粒径对氧化锌抑菌活性的影响

International Journal of Inorganic Materials Pub Date : 2001-11-01 DOI: 10.1016/S1466-6049(01)00197-0

Osamu Yamamoto

引用次数: 840

Crystal structure of a new vanadium(IV) diphosphate: VP2O7, prepared by lithium extraction from LiVP2O7 用锂萃取法制备新型二磷酸钒VP2O7的晶体结构

International Journal of Inorganic Materials Pub Date : 2001-11-01 DOI: 10.1016/S1466-6049(01)00092-7

Gwenaëlle Rousse , Calin Wurm , Mathieu Morcrette , Juan Rodriguez-Carvajal , Joël Gaubicher , Christian Masquelier

{"title":"Crystal structure of a new vanadium(IV) diphosphate: VP2O7, prepared by lithium extraction from LiVP2O7","authors":"Gwenaëlle Rousse , Calin Wurm , Mathieu Morcrette , Juan Rodriguez-Carvajal , Joël Gaubicher , Christian Masquelier","doi":"10.1016/S1466-6049(01)00092-7","DOIUrl":"10.1016/S1466-6049(01)00092-7","url":null,"abstract":"<div>A new vanadium(IV) diphosphate, VP2O7, was obtained by lithium extraction from LiVP2O7. The parent compound, LiVP2O7, is built on [P2O7] groups and [VO6] octahedra and its structure has been confirmed by Synchrotron X-ray powder diffraction. The extraction of one lithium, both electrochemically or chemically, leads to VP2O7 which presents a totally different diffraction pattern diagram. The crystal structure of this new compound was determined from Synchrotron X-ray powder diffraction on the chemically prepared sample. The framework of LiVP2O7 is maintained upon lithium extraction, and VP2O7 crystallizes in space group P21. Compared to LiVP2O7, there is a very large cell distortion due to a modification of the shape of the tunnels that contained lithium ions along with an oxidation of the vanadium VIII to VIV that induces shorter V–O bond lengths. The phase transformation from LiVP2O7 to VP2O7 is found to be displacive and not reconstructive.</div>","PeriodicalId":100700,"journal":{"name":"International Journal of Inorganic Materials","volume":"3 7","pages":"Pages 881-887"},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1466-6049(01)00092-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85784767","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: 27

Direct precipitation of spinel type oxide ZnGa2O4 from aqueous solutions at low temperature below 90°C 在90℃以下的低温下，从水溶液中直接析出尖晶石型氧化物ZnGa2O4

International Journal of Inorganic Materials Pub Date : 2001-11-01 DOI: 10.1016/S1466-6049(01)00178-7

Masanori Hirano, Shiro Okumura, Yasunori Hasegawa, Michio Inagaki

引用次数: 26

Transport properties of Bi2Sr2Ca1−xGdx(Cu1−yZny)2Oy epitaxial thin films Bi2Sr2Ca1−xGdx(Cu1−yZny)2Oy外延薄膜的输运特性

International Journal of Inorganic Materials Pub Date : 2001-11-01 DOI: 10.1016/S1466-6049(01)00045-9

Tzuen-Rong Yang , G. Ilonca , Mi-Ra Kim , G. Stiufiuc , C. Lung

引用次数: 1

Characterisation of stoichiometric sol–gel mullite by fourier transform infrared spectroscopy 化学计量溶胶-凝胶莫来石的傅里叶变换红外光谱表征

International Journal of Inorganic Materials Pub Date : 2001-11-01 DOI: 10.1016/S1466-6049(01)00189-1

P Padmaja, G.M Anilkumar, P Mukundan, G Aruldhas, K.G.K Warrier

{"title":"Characterisation of stoichiometric sol–gel mullite by fourier transform infrared spectroscopy","authors":"P Padmaja, G.M Anilkumar, P Mukundan, G Aruldhas, K.G.K Warrier","doi":"10.1016/S1466-6049(01)00189-1","DOIUrl":"10.1016/S1466-6049(01)00189-1","url":null,"abstract":"<div>Fourier Transform Infrared Spectroscopic investigation has been carried out to study the structural changes and coordination of Al and Si in the mullite system as a function of temperature (60–1400°C). The FTIR spectral patterns of the gel and the gel calcined at 200°C show bands corresponding to Al–O–Al and Si–O–Si vibrations. At higher temperatures hydroxyl groups and organics present have been removed. The absence of fine structure in the region 400–900 cm−1 in the temperature range 400–1000°C is interpreted as due to the existence of nanostructured alumina, silica and alumina–silica agglomeration in the amorphous state. Analysis of the spectra indicates the presence of both octahedral and tetrahedral coordination at 1000°C, the temperature around which spinel is formed. The shifting of the asymmetric stretching frequencies of the Si–O–Si and Al–O–Si networks to higher wave numbers indicate the formation of mullite at 1200°C. Crystalline nature of the product is indicated by the sharpening of spectral peaks. The spectra also indicates the completion of mullite formation at 1250°C.</div>","PeriodicalId":100700,"journal":{"name":"International Journal of Inorganic Materials","volume":"3 7","pages":"Pages 693-698"},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1466-6049(01)00189-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74285733","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: 150

Influence of tile synthesis parameters on the structural and textural properties of precipitated manganese oxides 瓦片合成参数对沉淀锰氧化物结构和织构性能的影响

International Journal of Inorganic Materials Pub Date : 2001-11-01 DOI: 10.1016/S1466-6049(01)00091-5

J. Boyero Macstre , E. Fernández López , J.M. Gallardo-Amores , R. Ruano Casero , V. Sánchez Escribano , E. Pérez Bernal

引用次数: 56

Metal–insulator transition in the spinel-type Cu(Ir1−xPtx)2S4 system 尖晶石型Cu(Ir1−xPtx)2S4体系中的金属-绝缘体转变

International Journal of Inorganic Materials Pub Date : 2001-11-01 DOI: 10.1016/S1466-6049(01)00180-5

Nobuhiro Matsumoto, Yasuhiro Yamauchi, Junji Awaka, Yasushi Kamei, Hideaki Takano, Shoichi Nagata

引用次数: 8

Lithium loss from lithium cobalt oxide: hexagonal Li0.5Co0.5O to cubic Li0.065Co0.935O phase transition 氧化钴锂的锂损失:六方Li0.5Co0.5O向立方Li0.065Co0.935O相变

International Journal of Inorganic Materials Pub Date : 2001-11-01 DOI: 10.1016/S1466-6049(01)00185-4

Ermete Antolini

{"title":"Lithium loss from lithium cobalt oxide: hexagonal Li0.5Co0.5O to cubic Li0.065Co0.935O phase transition","authors":"Ermete Antolini","doi":"10.1016/S1466-6049(01)00185-4","DOIUrl":"10.1016/S1466-6049(01)00185-4","url":null,"abstract":"<div>Lithium loss from LiCoO2 following isochronal thermal treatment for 5 h in the temperature range 850–1300°C was determined by thermogravimetric (TGA) and diffractometric (XRD) measurements. Lithium vaporization starts from 900°C, and following thermal treatment at 1300°C 85% of lithium was lost. At 1050°C a change in the mechanism of lithium and oxygen evaporation was observed. Initially, following lithium loss, LiyCo2−yO2 (solid solution of CoO in LiCoO2) was formed. An activation energy of 305 kJ mol−1, not too far from the heat of reaction from Li2O to Li2O2 vapour, was obtained. Phase transition to cubic Li0.065Co0.935O structure occurred starting from thermal treatment at 1050°C. Both hexagonal and cubic lithium cobalt oxide structures were subjected to phase transition to get LiCoO2 and Co3O4 during cooling, but the cubic phase was stabilized against phase transition with increasing temperature.</div>","PeriodicalId":100700,"journal":{"name":"International Journal of Inorganic Materials","volume":"3 7","pages":"Pages 721-726"},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1466-6049(01)00185-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89320690","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: 14

Luminescent properties and lattice defects correlation on zinc oxide 氧化锌的发光特性与晶格缺陷的关系

International Journal of Inorganic Materials Pub Date : 2001-11-01 DOI: 10.1016/S1466-6049(01)00055-1

S.A.M Lima, F.A Sigoli, M Jafelicci Jr, M.R Davolos

{"title":"Luminescent properties and lattice defects correlation on zinc oxide","authors":"S.A.M Lima, F.A Sigoli, M Jafelicci Jr, M.R Davolos","doi":"10.1016/S1466-6049(01)00055-1","DOIUrl":"10.1016/S1466-6049(01)00055-1","url":null,"abstract":"<div>The ZnO luminescent properties are strongly influenced by the preparation method and they are principally related to electronic and crystalline structures. This work reports about the correlation among luminescence properties of ZnO, obtained from zinc hydroxycarbonate, and crystalline lattice defects, microstrain, as function of thermal treatment. The crystallite size increase and the qualitative microstrain, obtained by Williamson–Hall plots, decrease as function of temperature. The evolution of electronic defects is analyzed by luminescence spectroscopy based on energy of the electronic transitions. From excitation spectrum, it is verified two bands around 377 nm and 405 nm attributed to the transitions between valence–conduction bands and valence band to interstitial zinc level, respectively. The emission spectra of sample treated at 600°C shows large band at 670 nm. However, the green emission around 530 nm is observed for samples treated at 900°C. The intensities of excitation and emission bands are associated with the increase of the electronic defects that depend on the strain lattice decrease. The lowest strain lattice results on the best green luminescent properties of zinc oxide.</div>","PeriodicalId":100700,"journal":{"name":"International Journal of Inorganic Materials","volume":"3 7","pages":"Pages 749-754"},"PeriodicalIF":0.0,"publicationDate":"2001-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1466-6049(01)00055-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86098751","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: 220