china kegunaan titanium dioxide

Resumen–En este artículo se discute el descubrimiento del litopón fosforescente en dibujos a la acuarela por el artista americano John La Farge, fechados de 1890 a 1905, y la historia del litopón en la industria de los pigmentos a finales del Siglo XIX y principios del Siglo XX. A pesar de tener muchas cualidades deseables para su uso en pintura para acuarela o pinturas al óleo blancas, el desarrollo del litopón como pigmento para artistas fue obstaculizado por su tendencia a oscurecerse con la luz solar. Su disponibilidad para los artistas y su adopción por ellos sigue siendo poco clara, ya que por lo general los catálogos comerciales de los coloristas no eran explícitos al describir si los pigmentos blancos contenían litopón. Además, el litopón se puede confundir con blanco de plomo durante el examen visual, y su fosforescencia de corta duración puede ser fácilmente pasada por alto por el observador desinformado. A la fecha, el litopón fosforescente ha sido documentado solamente en otra obra mas: una acuarela por Van Gogh. Además de la historia de la fabricación del litopón, el artículo detalla el mecanismo para su fosforescencia, y su identificación con la ayuda de espectroscopía de Raman, y de espectrofluorimetría.

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Titanium dioxide (TiO2) is a naturally occurring mineral that is mined from the earth, processed and refined, and added to a variety of foods, as well as other consumer products. White in color, it is used to enhance the color and sheen of certain foods and is also key for food safety applications. In its natural state it exists in different bulk crystalline forms, such as anatase and rutile, but during processing it is ground into a very fine powder.

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In addition to hiding power, titanium dioxide also plays a vital role in enhancing the durability of paints. It acts as a barrier, protecting the walls from external elements such as UV radiation, moisture and pollutants. Titanium dioxide's high refractive index allows it to reflect harmful UV rays, preventing them from fading paint and retaining its vibrant colors for a long time. This UV resistance is especially important for facades that are exposed to sunlight throughout the day.

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The global lithopone pigment market is driven by the growth of end-use industries, particularly construction and automotive, where coatings and plastics play a significant role. Manufacturers are constantly innovating to improve the quality of lithopone pigments, focusing on enhancing their whiteness, opacity, and weather resistance. Environmental concerns have also led to the development of eco-friendly production methods, reducing waste and minimizing the environmental footprint.

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  • Quotes from lithopone suppliers highlight the quality and versatility of this pigment. One supplier mentioned, Lithopone is a valuable ingredient in our product range, as it offers superior coverage and color retention in paint formulations. Another supplier emphasized, Our customers rely on lithopone for its excellent hiding power and gloss retention in various applications.
  • Once the raw materials are ground to the proper size, they are subjected to a series of chemical treatments to further enhance the performance of the pigment. These treatments help to improve the dispersibility, hiding power, and brightness of the lithopone 28-30%, making it suitable for a wide range of applications.