Red rare-earth lanthanum cerium sulfide dye and preparation method thereof
A lanthanum sulfide and rare earth technology, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of poor stability and color performance of sulfur oxides, poor β-type structure, and sulfur deficiency, and achieve rich Effects of color and tint, lower synthesis temperature, and improved stability
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[0038] Example 1
[0039] According to the chemical structure of the product is Na 0.2 CeS 1.6 The molar content of the various metal raw materials and the total amount of raw materials are 500 grams. Weigh the raw materials, mix the raw materials sodium bicarbonate, rare earth lanthanum oxide and rare earth cerium oxide, and then put them into the reaction boat, and then put them into the tube furnace Inside, the reactor is closed, the inert gas is high-purity nitrogen, and the gas flow rate is 0.1 liter / min. After 10 minutes, the sulfur source gas produced by the heating and melting decomposition of ammonium thiocyanate is introduced, and then the heating rate is 10℃ / min. , Raise the high temperature tubular reactor to 700℃ and keep it at this temperature for 3h. Continue to pass sulfur source gas and inert gas, and then continue to heat up to 900°C at a rate of 10°C / min, and keep it at this temperature for 2h. Then stop heating and supply sulfur source gas, cool naturally, and co...
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[0044] Example 2
[0045] The rare earth raw material is cerium carbonate, and the others are the same as in Example 1. A red product is obtained. Its structure is Th in cubic γ-type structure 3 P 4 Crystalline phase. The CIE color coordinate is: L * =50.082, a * = 23.379, b * = 14.492.
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[0046] Example 3
[0047] Anhydrous sodium carbonate is used as the alkali metal raw material, and the inert gas is high-purity argon. The others are the same as in Example 1, to obtain a red product. Its structure is Th in cubic γ-type structure 3 P 4 Crystalline phase. The CIE color coordinate is: L * =50.082, a * = 23.379, b * = 14.492.
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