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Tin-doped (IV) sulfide lanthanum pigment and preparation method thereof

A technology of lanthanum sulfide and pigments, applied in chemical instruments and methods, inorganic pigment treatment, fibrous fillers, etc., can solve the problems of monotonous color and limited pigment application, and achieve the effects of low price, considerable application prospects, and high safety

Inactive Publication Date: 2008-06-18
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

Generally speaking, the color is concentrated in the red color system, and the color is relatively monotonous, so it will also limit the wider application of this type of pigment

Method used

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  • Tin-doped (IV) sulfide lanthanum pigment and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] According to the chemical structural formula of the product is Sn 0.005 La 1.995 S 3.0025 The molar content of various metal raw materials and the total amount of raw materials are 500 grams to weigh the raw materials tin dioxide (purity ≥ 98%) and rare earth lanthanum oxide (purity ≥ 99%), mix them evenly, and then put them into the reaction boat in the tube furnace. Then, close the reaction furnace, feed high-purity argon gas (purity ≥ 99.99%), the gas flow rate is 0.1 liter / min, and feed ammonium thiocyanate to heat and melt after 10 minutes to generate sulfur source gas. Then, the temperature of the high-temperature tubular reactor was raised to 700°C at a heating rate of 10°C / min, and the temperature was kept at this temperature for 4 hours. Continue to pass sulfur source gas and inert gas, then continue to heat up to 900°C with a heating rate of 10°C / min, keep warm at this temperature for 1h, then stop heating and flow sulfur source gas, cool naturally, and con...

Embodiment 2

[0036] The rare earth raw material adopts lanthanum carbonate, and others are the same as in Example 1. Obtain yellow product, CIE color coordinate is: L * =77.270,a * =6.514,b * = 43.699.

Embodiment 3

[0038] Sulfur source using H 2 S, gas flow rate 0.05 liter / min, other with embodiment 1, obtains yellow product, and CIE color coordinate is: L * =77.270,a * =6.514,b * = 43.699.

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Abstract

The invention relates to sn-doped (IV) lanthanum sulfide pigment and a preparation method thereof. The pigment chemical formula is SnxLa<2-x>S<3+x / 2>, wherein, x is less than or equal to 0.5 and more than or equal to 0, and the color can gradually transit from yellow to orange and red. The raw materials of tin dioxide and rare earth lanthanum oxide (or lanthanum carbonate) are uniformly mixed and are put in a reaction furnace then. The inert gas of nitrogen or argon and sulfur source gas are input. Through a certain period of high temperature reaction, the sn-doped rare earth lanthanum sulfide pigment is obtained after being cooled. Through regulating the doping amount of tin, a series of nontoxic pigments continuously changing from yellow to red can be obtained. The invention can be widely applied to coloring the building materials of plastics, paints, coatings, rubbers, leather, ceramics, inks, paper, cosmetics, cement, etc.

Description

technical field [0001] The invention relates to a rare earth lanthanum sulfide which can be used as a yellow to red color pigment doped with metal tin 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 th...

Claims

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Application Information

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IPC IPC(8): C09C3/06C09C1/00
Inventor 于江波张洪杰索阔洛夫菲拉特娃图斯尼科娃周誓红
Owner CHANGCHUN INST OF APPLIED CHEMISTRY - CHINESE ACAD OF SCI
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