{"title":"Importance of soft solution processing for advanced BaZrO3 materials","authors":"B Robertz, F Boschini, R Cloots, A Rulmont","doi":"10.1016/S1466-6049(01)00122-2","DOIUrl":"10.1016/S1466-6049(01)00122-2","url":null,"abstract":"<div><p><span><span>Barium zirconate<span><span> is an interesting material for refractory applications as well as a good substrate for the manufacturing of high temperature superconductors. However, its solid state synthesis requires high temperature and provides inhomogeneous powder with a broad particle size distribution. In order to avoid these disadvantages, soft solution routes are of growing importance in the ceramic </span>powder synthesis. Precipitation, decomposition of precursors, combustion techniques offer alternative ways to the solid state method. Advantages of these are a lower </span></span>calcination temperature, production of homogeneous and fine monodisperse powders. The obtained powders have been characterised by XRD, IR, SEM and DTA/TG analysis. The influence of the synthesis conditions on the properties of BaZrO</span><sub>3</sub> has been studied.</p></div>","PeriodicalId":100700,"journal":{"name":"International Journal of Inorganic Materials","volume":"3 8","pages":"Pages 1185-1187"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1466-6049(01)00122-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74061686","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}
{"title":"NTC characteristics of bismuth based ceramic at high temperature","authors":"A Basu, A.W Brinkman, T Hashemi","doi":"10.1016/S1466-6049(01)00132-5","DOIUrl":"10.1016/S1466-6049(01)00132-5","url":null,"abstract":"<div><p>NTC characteristics of a ceramic based on Bi<sub>2</sub>O<sub>3</sub> doped with TiO<sub>2</sub>, Ta<sub>2</sub>O<sub>5</sub> and WO<sub>3</sub><span><span> have been studied over a temperature range of 100 to 700°C. The material was pressed into pellets and sintered in air from 700 to 1000°C at 100°C intervals for 14 h. The microstructure was studied using SEM and evidence of a sintered body with grain sizes approximately 7–10 μm was observed in the material fired at 1000°C. XRD analysis indicated the emergence of a monophase material when sintered at 1000°C, which clearly verified along with the SEM studies, the completion of the sintering process. Electrical characterisation of the material was done by measuring the resistance and the capacitance over a temperature range of 100 to 700°C, in air. The material showed good NTC characteristics over the whole range of temperature with </span>thermistor constants </span><em>B</em>=4840 K and Δ<em>E</em>=386 meV. The capacitance changed significantly over the temperature range (∼10<sup>−11</sup> F at 100°C to ∼10<sup>−6</sup> F at 700°C).</p></div>","PeriodicalId":100700,"journal":{"name":"International Journal of Inorganic Materials","volume":"3 8","pages":"Pages 1219-1221"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1466-6049(01)00132-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82719158","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}
Roger Marchand, Franck Tessier, André Le Sauze, Nadège Diot
{"title":"Typical features of nitrogen in nitride-type compounds","authors":"Roger Marchand, Franck Tessier, André Le Sauze, Nadège Diot","doi":"10.1016/S1466-6049(01)00145-3","DOIUrl":"10.1016/S1466-6049(01)00145-3","url":null,"abstract":"<div><p><span>Nitride and oxynitride materials have attractive properties directly related to the role played by nitrogen. In particular, a comparison between oxynitrides and oxides highlights the characteristics of a nitrogen N</span><sup>3−</sup>/oxygen O<sup>2−</sup> substitution: an increase in the anionic formal charge, a greater covalent character, a higher cross-linking density in glasses, a reducing character due to the N<sup>3−</sup>/N<sup>0</sup> redox couple, and modified acid–base properties. Each specific character is illustrated by appropriate examples.</p></div>","PeriodicalId":100700,"journal":{"name":"International Journal of Inorganic Materials","volume":"3 8","pages":"Pages 1143-1146"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1466-6049(01)00145-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78216623","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}
{"title":"Interrelation between the properties and kinetic processes in materials","authors":"Anatolii Ya Gubenko","doi":"10.1016/S1466-6049(01)00157-X","DOIUrl":"10.1016/S1466-6049(01)00157-X","url":null,"abstract":"<div><p>On the basis of investigations of the growth rate and electrophysical properties in discrete ranges of temperature and concentration in which phase transition occur, an interrelation between the growth kinetics and properties of the newly formed solid phase was established. This interrelation was shown to be caused by the presence of a local equilibrium at the solid–liquid interface and by the character of interatomic interactions in the melt and in the solid phase.</p></div>","PeriodicalId":100700,"journal":{"name":"International Journal of Inorganic Materials","volume":"3 8","pages":"Pages 1339-1341"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1466-6049(01)00157-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"110292636","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}
M Benkerri , R Halimi , A Bouabellou , A Mosser , J.P Sens
{"title":"Antimony dopant redistribution during copper silicide formation","authors":"M Benkerri , R Halimi , A Bouabellou , A Mosser , J.P Sens","doi":"10.1016/S1466-6049(01)00141-6","DOIUrl":"10.1016/S1466-6049(01)00141-6","url":null,"abstract":"<div><p><span>In the present work, copper silicide formation and the redistribution of implanted Sb</span><sup>+</sup><span> ions were studied by means of Rutherford backscattering spectrometry<span> (RBS) and X-ray diffraction (XRD). Copper thin films, of 500 Å thickness, were evaporated, at room temperature, onto Sb implanted Si(111) wafers. Two doses, 5×10</span></span><sup>14</sup> and 5×10<sup>15</sup> Sb<sup>+</sup> cm<sup>−2</sup>, were used at 130 keV. The samples were heat treated in vacuum by conventional thermal annealing in the temperatures range 500–700°C for various times. It was observed that, independent of Sb implant dose, two silicides (Cu<sub>3</sub>Si and Cu<sub>4</sub><span>Si) were formed in the considered temperature range. Antimony ions implanted initially in the Si substrates were found to redistribute towards the sample free surface.</span></p></div>","PeriodicalId":100700,"journal":{"name":"International Journal of Inorganic Materials","volume":"3 8","pages":"Pages 1299-1301"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1466-6049(01)00141-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85934950","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}
K Lott , T Nirk , M Raukas , O Volobujeva , A Öpik , A Vishnjakov
{"title":"High temperature electrical conductivity in the Ag solubility limit region in ZnS and in CdSe","authors":"K Lott , T Nirk , M Raukas , O Volobujeva , A Öpik , A Vishnjakov","doi":"10.1016/S1466-6049(01)00137-4","DOIUrl":"10.1016/S1466-6049(01)00137-4","url":null,"abstract":"<div><p>To determine analytically Ag solubility in ZnS or in CdSe monocrystals, Ag was diffused into the monocrystal at a fixed temperature <em>T</em> and under the defined component pressure <em>p</em>. In the region of sulfide phases, in ZnS the Ag solubility is complicated. It depends on activities of Ag<sub>2</sub>S, Ag and incorporation mechanisms. In the equilibrium of ZnS with metallic alloys, an increase of <em>p</em><sub>Zn</sub> causes the total outdiffusion of Ag. The high temperature electrical conductivity of silver doped CdSe single crystal was measured over the range from 500°C to 900°C. In the range, where conductivity decreases with the increase of <em>p</em><sub>Cd</sub>, the results may be explained by the decrease of solubility of Ag in CdSe. These results were in agreement with the data obtained by the analytical method.</p></div>","PeriodicalId":100700,"journal":{"name":"International Journal of Inorganic Materials","volume":"3 8","pages":"Pages 1295-1297"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1466-6049(01)00137-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90210922","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}
Peter Majewski, Darja Benne, Lars Epple, Fritz Aldinger
{"title":"Phase equilibria in the system La2O3–SrO–Mn3O4 in air","authors":"Peter Majewski, Darja Benne, Lars Epple, Fritz Aldinger","doi":"10.1016/S1466-6049(01)00156-8","DOIUrl":"10.1016/S1466-6049(01)00156-8","url":null,"abstract":"<div><p>The phase equilibria of the system La<sub>2</sub>O<sub>3</sub>–SrO–Mn<sub>3</sub>O<sub>4</sub><span> in air has been studied. The Perovskite structured phases LaMnO</span><sub>3</sub> and SrMnO<sub>3</sub> do not form complete solid solutions below 1350°C. Ternary phases were not found.</p></div>","PeriodicalId":100700,"journal":{"name":"International Journal of Inorganic Materials","volume":"3 8","pages":"Pages 1257-1259"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1466-6049(01)00156-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80162706","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}
{"title":"Preparation and properties of an integrated system ‘photosensitive heterostructure–semiconductor scintillator’ on the basis of compounds AIIBVI","authors":"A.I Focsha , P.A Gashin , V.D Ryzhikov , N.G Starzhinskiy","doi":"10.1016/S1466-6049(01)00134-9","DOIUrl":"10.1016/S1466-6049(01)00134-9","url":null,"abstract":"<div><p><span>Ways of practical realization are studied for a unique property combination found in crystals ZnSe(Te) as semiconductor materials and highly efficient scintillators. It is shown that this combination allows to create heterostructures – photoreceivers of intrinsic luminescence of the scintillator directly on the ZnSe(Te) crystal surface. Methods are considered of preparation of photosensitive structures </span><em>n</em>ZnSe(Te)–<em>p</em>ZnTe and ZnSe(Te)/<em>p</em>ZnTe–<em>n</em><span>CdSe using solid-phase substitution reactions and subsequent epitaxial growth on crystals ZnSe(Te) with orientation [110]. For practical applications, the most suitable are combined detectors of ZnSe(Te)/</span><em>p</em>ZnTe–<em>n</em>CdSe type. Optimum thickness of epitaxial <em>p</em>-ZnTe and <em>n</em>-CdSe layers was 6–8 and 18–20 μm, respectively. It has been shown that maximum e.m.f. value for integrated detectors is 1.2–1.4 V, and their X-ray sensitivity reaches values up to 150–200 nA·min/R·cm<sup>2</sup>. Dynamic linearity range of output characteristics of the detectors was not less than 10<sup>5</sup>, afterglow level after 20 ms – less than 0.05%, allowing to use them in X-ray tomographs.</p></div>","PeriodicalId":100700,"journal":{"name":"International Journal of Inorganic Materials","volume":"3 8","pages":"Pages 1223-1225"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1466-6049(01)00134-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82982103","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}
P. Deniard , M.T. Caldes , X.D. Zou , N. Diot , R. Marchand , R. Brec
{"title":"Structural modulation in Sr1.4Ta0.6O2.9: non-harmonicity on ADPs during Rietveld refinement","authors":"P. Deniard , M.T. Caldes , X.D. Zou , N. Diot , R. Marchand , R. Brec","doi":"10.1016/S1466-6049(01)00111-8","DOIUrl":"10.1016/S1466-6049(01)00111-8","url":null,"abstract":"<div><p>The perovskite-like material Sr<sub>1.4</sub>Ta<sub>0.6</sub>O<sub>2.9</sub> presents structural modulations due to oxygen vacancies. A non-harmonic treatment of atomic displacement parameters was used to obtain information on atom mean localization in addition to correlative displacement of cations located near oxygen vacancies.</p></div>","PeriodicalId":100700,"journal":{"name":"International Journal of Inorganic Materials","volume":"3 8","pages":"Pages 1121-1123"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1466-6049(01)00111-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87637865","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}
A Fouzri , R Dorbez-Sridi , M Oumezzine , A Missaoui
{"title":"Water confined in silica gel at room temperature, X-ray diffraction study","authors":"A Fouzri , R Dorbez-Sridi , M Oumezzine , A Missaoui","doi":"10.1016/S1466-6049(01)00148-9","DOIUrl":"10.1016/S1466-6049(01)00148-9","url":null,"abstract":"<div><p>Experiments of X-ray diffraction at room temperature, on water confined in silica gel powder (hydrophilic surface) at three levels of hydration (18, 25 and 50%) are presented and analysed. The structural modifications of water when absorbed in silica gel are determined.</p></div>","PeriodicalId":100700,"journal":{"name":"International Journal of Inorganic Materials","volume":"3 8","pages":"Pages 1315-1317"},"PeriodicalIF":0.0,"publicationDate":"2001-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1466-6049(01)00148-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77152826","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}