111 resultados para porcelana


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81 hojas : ilustraciones, fotografías.

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18 hojas : ilustraciones, fotografías a color

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19 hojas : ilustraciones, fotografías

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27 hojas : ilustraciones, fotografías

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Tese de dout., Ciências Agrárias, Faculdade de Engenharia de Recursos Naturais, Univ. do Algarve, 2003

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Dissertação de mestrado, Arqueologia, Faculdade de Ciências Humanas e Sociais, Universidade do Algarve, 2015

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Dissertação apresentada para cumprimento dos requisitos necessários à obtenção do grau de Mestre em Arqueologia

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Tesis (Maestría en Ciencias con Especialidad en Ingeniería Cerámica) U.A.N.L.

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Teniendo en cuenta el sistema general de riesgos profesionales, expresado en la ley 100de 1993 y estructurado mediante el decreto ley 1295 de 1994, cuyo propósito incluye laprevención de riegos y la elaboración de programas de salud ocupacional, se considerade gran importancia la evaluación de las condiciones de bienestar físico, mental y socialde los trabajadores de la industria del vidrio, específicamente del Taller de Molduras dePeldar S.A. como medio para lograr una mejor productividad.

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Historia de la mágica relación entre un pequeño ruiseñor y un poderoso emperador, escrita originalmente por Hans Christian Andersen, en el siglo XIX. Hace muchos años, en China, el emperador se enamoró del dulce canto de un ruiseñor que habitaba en el maravilloso jardín de su bello palacio de porcelana. Hasta tal punto llegaba su admiración, que cuando dejó de oír el canto porque el ave había desaparecido, el emperador enfermó.

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Acompañan al texto fotografías ilustrativas de algunas vitrinas de la exposición, de los actos de inauguración y de varias de las piezas de porcelana de Talavera y del Buen Retiro que se exponían

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Se estudia la historia de las fábricas de cerámica existentes en España desde el siglo XVIII. El repaso comienza con las lozas y porcelanas fabricadas en Alcora, fundación del Conde de Aranda de 1726, conocida por la calidad de su producción, y cuya decadencia empezó con el fallecimiento de su fundador. Otras manufacturas importantes son la Real Fábrica de Porcelana del Buen Retiro (1759-1812), fundada por Carlos III a su regreso de Italia para coronarse rey de España y que es continuación de la cerámica de Capo di Monte; y la Real Fábrica de la Florida, llamada después de la Moncloa, creada por Fernando VII y cerrada en época de Isabel II. Ya en el siglo XX, Francisco Alcántara erige la Escuela- Fábrica de Cerámica de Madrid en 1911, como continuación de la tradición del arte de la cerámica en la capital.

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A frequently encountered difficulty in oral prosthetics is associated with the loss of metallic alloys during the melting stage of the production of metal-ceramic replacement systems. Remelting such materials could impar their use in oral rehabilitation due to loss in esthetics, as well as in the chemical, physical, electrochemical and mechanical properties. Nowadays, the Ni-Cr-Mo-Ti alloy is widely used in metal-ceramic systems. Manufacturers state that this material can be remelted without significant alterations in its behavior, however little has been established as to the changes in the performance of this alloy after successive remelting, which is common practice in oral prosthetics. Therefore, the objective of this study was to evaluate possible changes in the esthetics and associated properties of metalceramic samples consisting of Ni-Cr-Mo-Ti and dental porcelain. Three to five remelting steps were carried out. The results revealed that Ni-Cr-Mo-Ti can be safely used even after three remelting steps. Further remelting significantly affect the characteristics of the alloys and should not be recommended for the manufacture of metal-ceramic systems

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The power industry generates as waste ceramic bodies of electrical fuses that are discarded after use. The formulation of ceramic bodies for porcelain electrical insulators using waste from the bodies fuse allocation promotes environmentally appropriate, through the reuse of the material. This work evaluated the technical feasibility of using waste for use in electrical porcelains with formulations containing the residue, feldspar and kaolinite. The raw materials were processed through grinding and sieving to 200 mesh. The ceramic material obtained from the proposed formulations with 25%, 30%, 34% and 40% of the residue went through a vibratory mill for grinding and homogenization, and then were sieved at 325 mesh. The samples were shaped in a uniaxial press, with the application of 25 MPa and sintered at 1100° C, 1150°C, 1200°C, 1225°C and 1250°C, at levels of 20 and 45 minutes. Were also developed bodies of evidence with reference formulations obtained without residue, to establish a comparison on physical, mechanical and electrical. The tests were conducted and technology: linear shrinkage, porosity, water absorption, resistance to bending to three points, measuring insulation resistance electrical resistivity of the material, X-ray diffraction and X-ray fluorescence Waste characterizations pointed to the existence of two phases: mullite and quartz phases are of great importance in the microstructure of the ceramic and this fact reveals a possibility for reuse in electrical porcelains. The mullite is an important constituent because it is a phase that makes it possible to increase the mechanical strength in addition to the body allows the use at high temperatures. The use of ceramic bodies residue fuses, proved feasible for application in electrical porcelain and the most significant results were obtained by the formulations with 25% waste and sintering at 1200°C