| | | Document Type | : | Latin Dissertation | | Language of Document | : | Spanish | | Record Number | : | 52854 | | Doc. No | : | TL22808 | | Call number | : | 1427025 | | Main Entry | : | Olga Lucia Medina Cruz | | Title & Author | : | Estudio de las propiedades térmicas de algunos vidrios y policristales de la forma A2BX4Olga Lucia Medina Cruz | | College | : | University of Puerto Rico, Mayaguez (Puerto Rico) | | Date | : | 2005 | | Degree | : | M.S. | | student score | : | 2005 | | Page No | : | 115 | | Abstract | : | The properties of specific heat, thermal conductivity, and heat flow were studied in polycrystalline materials of the form A2BX 4, like: Cs2CoCl4, Cs2ZnI4, [N(CH3)4]2CoCl4 and (NHa) 2CrO4 elaborated by the methods of quick and slow evaporation, as well as, in vitreous materials like: SiO2: Al2O 3: Sb2O3: CaO: Na2O: Cr2O 3 and [N(CH3)4]2CoCl4: P 2O5: Al2PO4: CaCO3 and the ceramic SiO2: Cr2O3: B2O 3, obtained by the fusion method. To analyze these variables, each of these compounds was submitted to temperature variations in the range of 260K to 370K at constant volume, which allowed to register the behavior of the samples under a change of temperature. When comparing the results obtained for specific heat and thermal conductivity with data already established, we were able to classify these compounds as semiconductor materials in the case of the polycrystals and as insulators for the glasses, in the normal phase. (Abstract shortened by UMI.) | | Subject | : | Pure sciences; Spanish text; Condensation; 0611:Condensation | | Added Entry | : | D. Castellanos | | Added Entry | : | University of Puerto Rico, Mayaguez (Puerto Rico) |
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http://lib.clisel.com/site/catalogue/52854
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