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Formation of crystalline phases in (SiO2–CaO–Fe2O3)–TiO2 based glasses
Glass ceramics were obtained by annealing of the SiO2–CaO–Fe2O3 system, and the devitrifying effect of adding TiO2 was compared with Fe2O3. In spite of its higher field strength, TiO2 was unable to accelerate the devitrifying kinetics as…
Estudio de aditividad de color, plasticidad y contracción de secado en mezclas arcillosas crudas
En el presente trabajo se estudia la viabilidad de aplicar leyes lineales de mezcla en composiciones arcillosas que incluyan ilitas, pirofilita, caolinita y desgrasantes, con respecto a diversas propiedades como la plasticidad, el comportamiento al…
INFLUENCIA DEL MATERIAL DE GRANALLADO
SOBRE LA ADHERENCIA DE RECUBRIMIENTOS INDUSTRIALES POR HVOF (influence of grit blasting materials on the adherence of industrial HVOF coatings )
Las granallas de alúmina son más costosas y duran menos que las granallas metálicas, a la hora de preparar sustratos para recubrirlos industrialmente por HVOF. En el presente trabajo, se reemplaza alúmina por acero como…
Deposition of Nanoparticle Suspensions by Aerosol Flame Spraying: Model of the Spray and Impact Processes
Aerosol flame spraying (AFS) combines the atomization of a colloidal suspension with the lateral injection of the aerosol in a flame. The aerosol droplets are partially dried when crossing the flame and then deposited as a coating onto a substrate.…
USING SEM FOR COMPARING TRENDS TO FORM CENOSPHERES IN SPRAY DRYING PROCESSES
Cenosphere formation is a current phenomenon when spray drying suspensions. An impervious crust is formed as the surface of sprayed droplets is dried by the hot gas, and the residual water inside the droplet is overheated, and breaks part of the…
Development of Iron Oxide-Rich Frits and Glazes for Application on Ceramic Tiles
In this study, different frit compositions were prepared in the SiO2–CaO–Fe2O3 system. The amounts of Fe2O3 were varied between 10 mass-% and 40 mass-%. The frits were melted and characterized using several different techniques in order…
Effect of Fluxing Additives in Iron-rich Frits and Glazes in the Fe2O3–SiO2–CaO–Al2O3 System
Glasses in the Fe2O3–SiO2–CaO system are potential candidates for many technological applications due to their ferrimagnetic and semiconductive properties, which have been extensively studied; in this sense, the effect of adding different…
SMOOTHING IRON OXIDE-BASED GLASS PARTICLES WITH AN OXYACETYLENIC FLAME
Milled particles from a (SiO2-CaO-Fe2O3) glass were smoothed by flame spraying, focusing on the elimination of superficial roughness or angularity without reaching complete fusion of the glass. The purpose of this study is the further application to…
Optimización de la preparación de barbotina en plantas de baldosas
Cuando el objetivo de una empresa cerámica es alcanzar una mayor producción, sin invertir en nuevos equipos, su principal preocupación es la optimización del rendimiento de producción de la maquinaria disponible. En…
Particles Spreading Phenomena in the Case of Glass Thermal Spraying
The spreading phenomena of particles during thermal spraying are quite difficult to observe given the kinetics of the process. In this work, the splat formation of glass and alumina is theoretically compared, showing that glass transition and…