{"title":"Young's modulus-porosity relationship for alumina substrates","authors":"G. D. Portu, P. Vincenzini","doi":"10.1016/0390-5519(79)90026-7","DOIUrl":"https://doi.org/10.1016/0390-5519(79)90026-7","url":null,"abstract":"","PeriodicalId":100227,"journal":{"name":"Ceramurgia International","volume":"520 1","pages":"165-167"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77063229","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":"Self-diffusion in alpha and beta silicon carbide","authors":"J.D. Hong, M.H. Hon, R.F. Davis","doi":"10.1016/0390-5519(79)90024-3","DOIUrl":"10.1016/0390-5519(79)90024-3","url":null,"abstract":"<div><p>The self-diffusion coefficients of <sup>14</sup>C and <sup>30</sup>Si have been measured for lattice transport in high purity and N-doped α-SiC single crystals and in high purity polycrystalline CVD β-SiC in the temperature range of 2123–2573 K. Grain boundary diffusion of <sup>14</sup>C has also been determined in the β-SiC material. The results of these studies reveal a vacancy mechanism wherein <sup>14</sup>C diffuses considerably faster than <sup>30</sup>Si in both materials. Furthermore, D<sub>c</sub><sup>★</sup> in the N-doped single crystals is smaller than for the undoped materials, while the opposite is true for the <sup>30</sup>Si transport in these crystals. Changes in the concentration of the charged C and Si vacancies are reasoned to be the underlying cause of this last phenomena. A discussion of the effect of Si evaporation and its effect upon the value of the diffusion coefficient is also presented.</p></div>","PeriodicalId":100227,"journal":{"name":"Ceramurgia International","volume":"5 4","pages":"Pages 155-160"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-5519(79)90024-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73716131","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":"Characteristics and sintering behaviour of zirconia ultrafine powders","authors":"K. Haberko","doi":"10.1016/0390-5519(79)90023-1","DOIUrl":"https://doi.org/10.1016/0390-5519(79)90023-1","url":null,"abstract":"<div><p>Coprecipitation from water solution of chlorides was used to obtain yttria-stabilized zirconia powders. It was shown that precalcination processing of the coprecipitated gel greatly affects the microstructure of the resultant powder as well as its cold compaction behaviour and hence its sinterability. Relative densities of +98% theoretical have been achieved at sintering temperature as low as 1300°C.</p></div>","PeriodicalId":100227,"journal":{"name":"Ceramurgia International","volume":"5 4","pages":"Pages 148-154"},"PeriodicalIF":0.0,"publicationDate":"1979-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-5519(79)90023-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91609533","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":"Development of porous sintered-ceramic separators for application in a LiAl/LiClKCl/FeS battery","authors":"G. Bandyopadhyay, J.T. Dusek, T.M. Galvin","doi":"10.1016/0390-5519(79)90012-7","DOIUrl":"10.1016/0390-5519(79)90012-7","url":null,"abstract":"<div><p>The procedure for fabrication of porous sintered-ceramic separators and the technical feasibility of using such separators in LiAl/molten LiClKCl/FeS battery cells have been investigated. Processing techniques have been developed to fabricate ∼1.5–2.5 mm thick, ∼35–60% porous, flat, sintered Y<sub>2</sub>O<sub>2</sub> and MgO separator plates with sufficient strength to allow handling prior to and during cell assembly. These separators performed successfully in laboratory-scale cells for up to ∼2000 h and 283 cycles, indicating that the concept of a sintered separator, is viable for LiAl/FeS batteries. The particularly attractive features of these separators are potentially low cost, prefabricated form that allows easy cell assembly, and small pore size (average diameter 0.5–1.0 μm) which provides good particle retention. The test results from the sintered-separator cells indicate that Y<sub>2</sub>O<sub>2</sub> is probably unsuitable for long-term performance in LiAl/FeS cells because of its reaction with the positive active material. This is in agreement with the recently reported data on cells with Y<sub>2</sub>O<sub>2</sub> felt and powder separators. Sintered MgO separators, however, showed good chemical and mechanical stability in the cell environment.</p></div>","PeriodicalId":100227,"journal":{"name":"Ceramurgia International","volume":"5 3","pages":"Pages 95-100"},"PeriodicalIF":0.0,"publicationDate":"1979-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-5519(79)90012-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82159696","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":"Transparent hot-pressed alumina","authors":"J.G.J. Peelen","doi":"10.1016/0390-5519(79)90016-4","DOIUrl":"10.1016/0390-5519(79)90016-4","url":null,"abstract":"<div><p>The optical properties of very dense hot-pressed alumina are compared with those of normally sintered alumina with equal pore volume. The influence of the pore size on the in-line and diffuse transmission of light through these materials is considered. The concept of transparency and translucency is critically discussed and it is demonstrated that alumina powder can be hot pressed to form a really transparent material. Relations between the degree of translucency and the microstructure and the preparation conditions of dense alumina are given.</p></div>","PeriodicalId":100227,"journal":{"name":"Ceramurgia International","volume":"5 3","pages":"Pages 115-119"},"PeriodicalIF":0.0,"publicationDate":"1979-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-5519(79)90016-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89271376","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":"Contribution to the system Europium — boron — carbon","authors":"K.A. Schwetz , M. Hoerle , J. Bauer","doi":"10.1016/0390-5519(79)90014-0","DOIUrl":"10.1016/0390-5519(79)90014-0","url":null,"abstract":"<div><p>By means of chemical preparation techniques and x-ray analysis the ternary system EuBC was studied, with special emphasis on the technologically important sections EuB<sub>6</sub>C and EuB<sub>6</sub>B<sub>4</sub>C. It was possible to prove the existance of a hexaboride-carbon solid solution EuB<sub>6−x</sub>C<sub>x</sub> (0 ⩽ x ⩽ 0.25), a ternary phase EuB<sub>2</sub>C<sub>2</sub>, the europlum carbides EuC<sub>x</sub> (⪡Eu<sub>2</sub>C⪢), EuC<sub>2</sub>, as well as another carbide of the approximate composition Eu<sub>2</sub>C<sub>3</sub>.</p></div>","PeriodicalId":100227,"journal":{"name":"Ceramurgia International","volume":"5 3","pages":"Pages 105-109"},"PeriodicalIF":0.0,"publicationDate":"1979-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-5519(79)90014-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82194699","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":"Phase equilibria in the Si,Al,Be/C,N system","authors":"G. Schneider, L.J. Gauckler, G. Petzow","doi":"10.1016/0390-5519(79)90013-9","DOIUrl":"10.1016/0390-5519(79)90013-9","url":null,"abstract":"<div><p>Phase equilibria studies in parts of the system Si, Al, Be/C, N were carried out at 1760 and 1860°C. In the carbide system Al<sub>4</sub>C<sub>3</sub>SiCBe<sub>2</sub>C seven new compounds were found and characterized by their chemical composition and crystal symmetry. In the nitride system AlNSi<sub>2</sub>N<sub>4</sub>Be<sub>2</sub>N<sub>2</sub> a solid solution between AlN and BeSiN<sub>2</sub> was found to exist besides the already known compounds. The carbonitride system showed solid solution between α-Al<sub>4</sub>SiC<sub>4</sub> and α-Al<sub>5</sub>C<sub>3</sub>N. Furthermore the compound AlN · SiC · Al<sub>4</sub>C<sub>3</sub> was found to exist.</p></div>","PeriodicalId":100227,"journal":{"name":"Ceramurgia International","volume":"5 3","pages":"Pages 101-104"},"PeriodicalIF":0.0,"publicationDate":"1979-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0390-5519(79)90013-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75334810","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}
C. Fiori, G. Fusaroli, A. Krajewski, P. Vincenzini
{"title":"On the fracture strength of tape-casted alumina substrates","authors":"C. Fiori, G. Fusaroli, A. Krajewski, P. Vincenzini","doi":"10.1016/0390-5519(79)90018-8","DOIUrl":"https://doi.org/10.1016/0390-5519(79)90018-8","url":null,"abstract":"","PeriodicalId":100227,"journal":{"name":"Ceramurgia International","volume":"44 1","pages":"124-126"},"PeriodicalIF":0.0,"publicationDate":"1979-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84592378","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}
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