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

Inactive Publication Date: 2008-01-16
CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the above method, if S is used as the sulfur source, sulfur actually boils at about 400 degrees, so the reaction at high temperature is prone to sulfur deficiency, so that the product is easily mixed with sulfur oxides, and the stability of sulfur oxides and c

Method used

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  • Red rare-earth lanthanum cerium sulfide dye and preparation method thereof

Examples

Experimental program
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Effect test

Example Embodiment

[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...

Example Embodiment

[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.

Example Embodiment

[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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Abstract

The invention relates to a rare earth lanthanum and cerium sulfate which can be used as a red paint and a preparation method of the rare earth lanthanum and cerium. The chemical formula of the paint is: AxLayCe1-yS(3+x)/2, wherein, A stands for one of alkali metals lithium, sodium and potassium, x is equal to or bigger tan 0 and is equal to or smaller than 1, and y is equal to or bigger tan 0 and is equal to or smaller than 1. The alkali metal elements are doped into the rare earth lanthanum and cerium sulfate matrix to prepare rare earth sulfide paints in different red color systems through adjusting the doped amount of the alkali metal elements and different proportions of the lanthanum and cerium in high temperature solid-state reaction with mixed sulfate source gas produced by ammonium thiocyanate being heated and melted as reaction gas under the conditions of unoxidizing atmosphere with inert gas being input and the heating temperature of 400 to 1000 DEG C. The structure of a series of rare earth lanthanum and cerium sulfate doped with the alkali metal elements is NaC1type or Th3P4 type of gamma type in single cubic crystal system. The preparation method is safer and more environment protecting, the paint is non-toxic, so that the paint can be used for coloring for plastic, oil paint, coating, rubber, leather, ceramic, ink, paper, cosmetic and construction material like cement.

Description

technical field [0001] The invention relates to a rare earth lanthanum cerium sulfide which can be used as a red pigment and a preparation method thereof. technical background [0002] Pigments can be divided into organic and inorganic pigments. Due to the advantages of good covering ability, good thermal stability, bright color and good dispersion, inorganic pigments have been widely used in many industrial fields, especially in plastics, paints, coatings, etc. , rubber, leather, ceramics, ink, paper, cosmetics, etc. Inorganic coloring pigments widely used at present, such as cadmium red, cadmium yellow, chrome green, because they contain metals that are increasingly restricted and even banned by legislation in many countries (especially cadmium, lead, chromium and cobalt) ). These metals are generally considered to be highly toxic. For example, among the six toxic and hazardous substances restricted by the "RoHS" directive implemented by the European Union on July 1, 20...

Claims

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Application Information

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IPC IPC(8): C09C1/00C09C3/06
Inventor 张洪杰于江波
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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