Preparation method of transparent rare earth composite oxide ultraviolet screener

A rare earth compound and oxide technology, applied in rare earth metal compounds, chemical instruments and methods, tin oxide, etc., can solve the problems of affecting ultraviolet shielding performance and high cost of nano powder, achieving a light degree of agglomeration, easy industrial production, Evenly distributed effect

Inactive Publication Date: 2013-06-05
BAOTOU RES INST OF RARE EARTHS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Their disadvantages are that the cost of making nano powders is high, and they have high photocatalytic activity, which can oxidize and degrade other components around them, affecting the performance of ultraviolet shielding performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Example 1: Accurately weigh 11g Ce(NO3)3 6H2O, 2g Zn(NO3)2 6H2O, 3g SnCl4 5H2O, dissolve in 300ml deionized water and stir to dissolve until the solution is clear, then add 1gPEG6000 dissolve. Then accurately weigh 15g of sodium hydroxide, dissolve it in 300ml of deionized water, and then drop the alkali solution into the rare earth mixed solution. Control the temperature at 65°C to 70°C until the reaction is complete, filter, wash, and place the precursor in a drying oven at 100°C for 12 hours at a constant temperature, then place it in a muffle furnace with a temperature gradient from 300°C to 900°C. Raise the temperature from room temperature to 300°C over 30 minutes and keep it warm for 1 hour; raise the temperature from 300°C to 600°C over 30 minutes and keep it warm for 1 hour;

[0021] The product is light yellow powder, and the particle size of the light yellow powder is D 50 It is 112.6nm. After being added into the polyester resin paint and detected by a do...

Embodiment 2

[0022] Example 2: Accurately weigh 15g Ce(NO3)3 6H2O, 2g Zn(NO3)2 6H2O, 5g SnCl4 5H2O, dissolve in 300ml deionized water and stir to dissolve until the solution is clear, then add 1g PEG6000 to dissolve . Then accurately weigh 16g of sodium hydroxide, dissolve it in 300ml of deionized water, and then drop the alkali solution into the rare earth mixed solution. Control the temperature at 65°C to 70°C until the reaction is complete, filter, wash, place the precursor in a drying oven at 100°C for 12 hours at a constant temperature, and then place it in a muffle furnace with a temperature gradient from 300°C to 900°C (same as Example 1) , heat preservation 1h, the light yellow powder measured by the United States Coulter LS230 laser particle size analyzer particle size D 50 It is 98.5nm. After being added to the polyester resin coating, it is detected by a double-beam UV-VI spectrophotometer, and the ultraviolet shielding rate can reach 96.5% when the wavelength is below 400nm. ...

Embodiment 3

[0023] Example 3: Accurately weigh 9g Ce(NO3)3 6H2O, 2g Zn(NO3)2 6H2O, 5g SnCl4 5H2O, dissolve in 300ml deionized water and stir to dissolve until the solution is clear, then add 1g PEG6000 to dissolve . Then accurately weigh 15g of sodium hydroxide, dissolve it in 300ml of deionized water, then drop the lye into the rare earth mixture, control the temperature at 65°C to 70°C until the reaction is complete, filter, wash, and place the precursor in a drying box Dry at a constant temperature of 100°C for 12 hours, then place it in a muffle furnace and raise the temperature from 300°C to 900°C (same example 1), and keep it warm for 1h. The particle size of the light yellow powder is measured by the American Coulter LS230 laser particle size analyzer 50 123.3nm. After being added to the polyester resin paint and detected by a double-beam UV-VI spectrophotometer, the ultraviolet shielding rate can reach 91.8% at a wavelength below 400nm. Between the wavelength of 400nm and 750nm,...

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Abstract

The invention relates to a preparation method of a transparent rare earth composite oxide ultraviolet screener. The method is characterized in that the method comprises the following steps: processing raw materials comprising a rare earth salt solution and salts of tin and zinc to prepare a mixed solution having a rare earth ion concentration of 0.05-2mol/L and having a rare earth salt mass fraction of 40-80%, adding a dispersant for dissolving, adding a precipitating agent in a dropwise manner, reacting under stirring at 50-90DEG C until the pH value reaches 7-8, carrying out filtration washing, drying at 70-110DEG C for 6-24h for converting to precursor powder, heating the precursor powder to 900DEG C in a 300DEG C temperature gradient manner, and carrying out heat insulation for 30-180min to obtain the transparent rare earth composite oxide ultraviolet screener having an average particle size of below 500nm. The ultraviolet screener has the advantages of transparency, cheapness, high quality, easy industrialized production, strong shielding of ultraviolet ray in a wavelength range of 100-400nm, permeation of visible light in a wavelength range of 400-780nm, high heat stability, high chemical stability, non-toxicity, odorlessness and solvent resistance.

Description

Technical field: [0001] The invention relates to a preparation method of a transparent rare earth composite oxide ultraviolet shielding agent, belonging to the technical field of inorganic composite material preparation. Background technique: [0002] Ultraviolet rays are electromagnetic waves with a wavelength of 100nm to 400nm. According to different wavelengths, ultraviolet rays are usually divided into three bands: long-wave ultraviolet (UVA) wavelengths are 320nm to 400 nm, which can reach the dermis of the skin, gradually destroying the elastic fibers of the skin and causing skin relaxation. Exposure to UVA radiation for a long time can cause blood vessel damage and make the skin red; medium-wave ultraviolet (UVB) wavelength is 290nm-320nm, which mainly affects the surface layer of the skin, and can also cause damage to the dermal fibers in the skin, making the skin Internal blood vessels dilate, the skin turns red, blisters, and pigmentation, which can lead to skin ca...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00C01G19/02C01G9/02C09K3/00
Inventor 张玉玺曹鸿璋于晓丽贾涛
Owner BAOTOU RES INST OF RARE EARTHS
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