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The Global ETD Search service is a free service for researchers
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Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
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Showing 161 to 170 of 4870 (0.014 seconds)| 161 |
Phase equilibria and crystallisation in some lithium oxide systemsWest, Anthony Roy January 1971 (has links)
Phase equilibria in the orthosilicate systems Li4SiO4 - Zn2SiO4, Li4SiO4 - Mg2Sio4 and Li4SiO4 - Zn2SiO4 - Mg2siO4 have been studied. wide ranges of thermally active solid solutions based on (a) Li4SiO4 and (b) Li2(Zn, Mg) SiO4 form; metastable phases are frequently encountered. Subsolidus compatibility relations in the system Li4SiO4 - Zn2SiO4 - Mg2SiO4 - SiO2 have been established; the crystallisation of some quaternary glasses has been studied. Metastable phases commonly crystallise at lower temperatures; possible reasons for this are given. A hexagonal phase with wurtzite (ZnS) structure occurs particularly often. The Li2O - SiO2 system has been shovm previously to crystallise a range of metastable, silica-rich lithium disilicate solid solutions from glasses and melts at lower temperatures. In this study, a range of Lithia-rich disilicate solid solutions was also found. In addition, several structural variants of the silica-rich solid solutions form at lower temperatures. The occurrence of a metastable, silica-rich lithium metasilicate solid solution is suggested. 75 mol % SiO2 melts crystallise, at ca 900c, a new metastable phase, lithium trisilicate, Li2Si3O7 Applications of this work to glass-ceramics are discussed. The polymorphs of Li2ZnSiO4 and Li2MgSiO4, and also those of Li2CosiO4 and the corresponding germanates, are structural derivatives of the high-and low-forms of Li3PO4. New intermediate polymorphs of Li3VO4 and Li3AsO4 have been found, in addition to those forms know to be isostructural with high-and low-Li3PO4. Altogether, approximately 40 new ortho-silicate, grmanate, etc. phases have been found; powder X-ray data are presented for their characterisation.
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Studies of catalytic reactions by direct gas chromatographic methodsMackenzie, R. E. January 1972 (has links)
No description available.
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The interactions of simple moleculesMaitland, Geoffrey Colin January 1972 (has links)
No description available.
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| 164 |
Studies of chemisorption and reactivity on silver, alkali-dosed silver rhodium surfacesMarbrow, Richard Anthony January 1977 (has links)
No description available.
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| 165 |
Oxidation reactions catalysed by X zeolitesMahoney, F. January 1975 (has links)
No description available.
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| 166 |
Infrared spectroscopic studies of adsorption at the solid/liquid interfaceMarshall, Kenneth January 1975 (has links)
No description available.
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| 167 |
The synthesis and reactions of corrins and related macrocyclesOverend, William Robert January 1972 (has links)
No description available.
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| 168 |
The production of propylene oxide by an electrochemical method using a bipolar packed bed cellOsifade, Ola B. January 1972 (has links)
No description available.
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| 169 |
A theory of the electronic structure of an atom adsorbed on a semi-infinite metalOxinos, George January 1979 (has links)
No description available.
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| 170 |
LEED studies of some adsorption systems on the (100) and (110) surfaces of nickelOnuferko, Julia H. January 1978 (has links)
No description available.
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