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The application of rare earth oxide in glass coloring

In the glassware or glass container production process, the ingredient adding dilute powder to adjust the color of the glass container, the chemical composition is rare earth oxides, specially used for coloring, with rare earth oxide coloring glass, also known as rare earth colors of glass. Because of the excellent performance of rare earth colorant series, used in glass bottles, glass containers in recent years. Glass coloring has received people's attention.

China's rare earth mineral resources is extremely rich, mainly distributed in Lanzhou, Guangzhou and other places, natural resources, using rare earth oxide color ware, glassware, beautiful colors, coloring stability, generally from oxide reduction atmosphere, especially with baht (Nd2O3) colored glass, in the sun light or incandescent light in the color purple red, and under the fluorescent lamp was blue purple. This is because the glass light source wavelength is different, the glass to its light absorption is also different, in different light source shows different color, that is, color, also known as color or double effect.

The rare earth element is located in the third group of the periodic table. Due to the presence of unsaturated layer, it was decided it to light radiation absorption has a specific selectivity and baht coloring glass. Due to the complexity of the spectral characteristics, from the UV visible light to infrared region appears a series of common absorption peak. And the absorption peak position is very stable, so it is often used as the standard glass of the calibration spectrophotometer.


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