Method for preparing yellow pigment by using commonly used color development for replacing rare-earth element praseodymium and vanadium color development

Abstract

The invention belongs to the technical field of ceramic coloring and pigment and particularly relates to a method for preparing yellow pigment by using commonly used color development for replacing rare-earth element praseodymium and vanadium color development. The method is mainly characterized in that zirconium oxychloride, cadmium sulfate, sodium sulfide, high-activity white carbon black, fluorine-containing multi-component mineralizer, caustic soda flakes and zinc chloride or ferrous chloride are used as raw materials, a technique of doping zinc ions and iron ions in envelope cadmium sulfide pigment is adopted, a solid-liquid combination method is adopted for introducing precursors, novel mineralizer is introduced during high-temperature sintering and the yellow pigment which can replace the rare-earth element praseodymium and the vanadium color development is prepared. The resistant temperature of a product can be improved by 30-50 DEG C on the basis of the resistant temperature of the original zirconium-praseodymium yellow and vanadium-zirconium yellow, the dissolved quantity of cadmium can fully satisfy the international standard, the grain shape is more evenly and grains are spherically distributed and the color development effect is two times of the color development effect of the original product.

Description

technical field [0001] The invention belongs to the technical field of ceramic coloring and pigments, and in particular relates to a method for preparing yellow pigments by replacing rare earth elements praseodymium and vanadium for color development. Background technique [0002] Praseodymium and vanadium elements can be used as coloring elements, such as zirconium-praseodymium yellow produced directly from praseodymium and vanadium-zirconium yellow produced directly from vanadium, which are the most used rare earth elements in the pigment industry. Zirconium praseodymium yellow and vanadium zirconium yellow are considered to be the best yellow ceramic pigments, which can remain stable up to 1250°C and can be used in one-off or refiring processes. Zirconium-praseodymium yellow is widely used in the coloring of architectural ceramics and daily-use ceramics. It can also be used as an underglaze pigment alone. Its coloring has a blue light and bright colors. It is a rare high-...

AI Technical Summary

Problems solved by technology

However, since 2009, the scarcity of praseodymium oxide and vanadium pentoxide and the integration of the rare earth industry have also promoted the return of the value of rare earths. Today, the prices of praseodymium yellow and vanadium zirconium yellow have increased by more than eight times.

Seriously affected the normal production of ceramic praseodymium vanadium yellow materials in China and the world, and also greatly weakened the international competitiveness of my country's ceramic color glaze industry

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