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A preparation method of silver and bismuth doped cadmium oxide near-infrared high reflection powder

A cadmium oxide and near-infrared technology, applied in chemical instruments and methods, inorganic chemistry, cadmium compounds, etc., can solve the problems of low near-infrared reflectivity of infrared heat-insulating nanomaterials, large-scale industrial production without application, and high production costs , to achieve the effect of high product purity, small particle size and simple equipment

Active Publication Date: 2019-06-07
畅的新材料科技(上海)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a method for preparing silver and bismuth doped cadmium oxide near-infrared high-reflective powder, which solves the problem that the near-infrared reflectivity of the infrared heat-insulating nanomaterials prepared at present is not high, and the production cost is low. Relatively high, not applied to the problem of large-scale industrial production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A method for preparing silver and bismuth doped cadmium oxide near-infrared high reflection powder, comprising the following steps:

[0019] (1) Select the main raw material cadmium chloride, and select silver nitrate and bismuth chloride together as the doping raw material, wherein the molar ratio of silver nitrate and bismuth chloride in the doping raw material is 1:0.1, and cadmium chloride, doped bismuth chloride The miscellaneous raw materials are added to the reaction solvent at a molar ratio of 1:0.02 for mixing treatment. The reaction solvent is deionized water, and the mass of the reaction solvent is 1 times the total mass of the cadmium salt and the doping raw material. Ultrasonic mixing is performed for 1 hour to obtain a precursor solution ;

[0020] (2) Gradually add sodium hydroxide to the precursor solution to adjust the pH of the precursor solution to 8.5;

[0021] (3) Place the precursor solution in a closed hydrothermal reaction kettle with a stirrer,...

Embodiment 2

[0023] A method for preparing silver and bismuth doped cadmium oxide near-infrared high reflection powder, comprising the following steps:

[0024] (1) Select the main raw material cadmium iodide, and select silver nitrate and bismuth chloride together as the doping raw material, wherein the molar ratio of silver nitrate and bismuth chloride in the doping raw material is 1:2, and cadmium iodide, doped bismuth chloride The miscellaneous raw materials are added to the reaction solvent at a molar ratio of 1:0.01 for mixing treatment. The reaction solvent is deionized water, and the mass of the reaction solvent is 1 times the total mass of cadmium iodide and doping raw materials. Ultrasonic mixing is performed for 2 hours to obtain a precursor solution;

[0025] (2) Gradually add ammonia water to the precursor solution to adjust the pH of the precursor solution to 9;

[0026] (3) Place the precursor solution in a closed hydrothermal reaction kettle with a stirrer, and stir for 6 ...

Embodiment 3

[0029] A method for preparing silver and bismuth doped cadmium oxide near-infrared high reflection powder, comprising the following steps:

[0030] (1) select main raw material cadmium nitrate, and select silver nitrate and bismuth chloride jointly as doping raw material, wherein the mol ratio that contains silver nitrate and bismuth chloride in the doping raw material is 1:0.2, with cadmium nitrate, doping raw material Adding to the reaction solvent at a molar ratio of 1:0.04 for mixing treatment, the reaction solvent is absolute ethanol, the mass of the reaction solvent is 1.2 times the total mass of cadmium nitrate and the doping raw material, and ultrasonically mixed for 3 hours to obtain a precursor solution;

[0031] (2) Gradually add potassium hydroxide to the precursor solution to adjust the pH of the precursor solution to 9;

[0032] (3) Place the precursor solution in a closed hydrothermal reaction kettle with a stirrer, and stir for 20 hours at 120°C;

[0033] (4) ...

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Abstract

The invention discloses a preparation method of silver-bismuth doped cadmium oxide near-infrared high-reflectivity powder and belongs to the technical field of cadmium oxide near-infrared high-reflectivity powder. The preparation method includes following steps: (1), selecting cadmium salt as a main raw material and silver salt and bismuth salt jointly as doping raw materials, and adding the cadmium salt and the doping raw materials according to a molar mass ratio of 1:(0.01-0.10) into a reaction solvent for mixing; (2), gradually adding dilute alkali into a precursor solution to adjust pH ofthe same to 8-9; (3), putting the precursor solution into an airtight hydrothermal reaction kettle with a stirrer, and stirring for reaction at 120-260 DEG C for 5-20h; (4), sufficiently washing reaction precipitate, drying, smashing, and calcining to obtain a target product. The preparation method is simple in process, low in energy consumption, simple in equipment and high in product purity andcan be directly applied in industrial production; the silver-bismuth doped cadmium oxide powder obtained by the method is small in particle size, narrow in distribution, less prone to aggregation andhigh in stability.

Description

technical field [0001] The invention relates to a preparation method of silver and bismuth doped cadmium oxide near-infrared high-reflection powder, and belongs to the technical field of cadmium oxide near-infrared high-reflection powder. Background technique [0002] Bismuth ions are the third type of near-infrared active ions discovered after transition metal ions and rare earth ions. For example, in 1999, Murata et al. discovered broadband luminescence in the near-infrared band in bismuth-doped zeolites. Then in 2001, Fujimoto et al. also found this phenomenon in bismuth-doped aluminosilicate glass. So far, the near-infrared fluorescence phenomenon of P-block elements represented by bismuth has come into people's sight and attracted extensive attention, opening up a new field for the application of near-infrared band fluorescence. In particular, the near-infrared fluorescence phenomenon produced by bismuth-doped materials will bring another revolution to optical communi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G11/00
CPCC01G11/00
Inventor 李曼郑文李方圆宋亚
Owner 畅的新材料科技(上海)有限公司