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Mica-base ultra-black material and its preparation method and application

A super black material, mica technology, applied in chemical instruments and methods, metal material coating process, fibrous fillers, etc., can solve the problems of interference imaging, insufficient blackness of black paint, etc., to reduce damage and achieve good electromagnetic shielding effect , the effect of reducing the reflectivity of light

Inactive Publication Date: 2008-01-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a method for preparing an ultra-black inorganic composite material. The ultra-black material can be used as a coating additive to solve the shortcomings of existing black coatings in optical imaging equipment that interfere with imaging due to insufficient blackness

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Take 50g of 60-mesh mica, wash it with the pretreatment solution, treat it with a mixture of 200g / L sulfuric acid and 120g / L nitric acid for 30 minutes, filter and wash with water; then use 15g / L stannous chloride solution and hydrochloric acid to adjust the pH to 0.6~ 2, sensitize the above mica powder for 5 minutes, filter and wash with water; then use 0.3g / L palladium chloride solution and hydrochloric acid to adjust the pH to between 1.2 and 1.9, treat the sensitized mica powder for 3 minutes, filter and wash with water ; use 20g / L of sodium hypophosphite to reduce activated mica powder for 1 minute, filter and wash with water; use chemical plating solution to reduce mica powder for 1 hour, and the plating solution consists of nickel sulfate 18g / L and sodium hypophosphite 12g / L , malic acid 16g / L and succinic acid 12g / L, lead acetate 3×10 -3 g / L, the temperature is at 85°C, and the pH value is 5.2, so that the nickel-phosphorus alloy is deposited on the surface of t...

Embodiment 2

[0031] Take 50g of 200 mesh mica, wash it with the pretreatment solution, treat it with a mixture of 400g / L sulfuric acid and 100g / L nitric acid for 60 minutes, filter and wash with water; then use 40g / L stannous chloride solution and hydrochloric acid to adjust the pH to 0.6~ 2, sensitize the above mica powder for 15 minutes, filter and wash with water; then use 0.5g / L palladium chloride solution and hydrochloric acid to adjust the pH to between 1.2 and 1.9, treat the sensitized mica powder for 5 minutes, filter and wash with water ; use 20g / L of sodium hypophosphite to reduce activated mica powder for 1 minute, filter and wash with water; use chemical plating solution to reduce mica powder for 1 hour, and the plating solution consists of nickel sulfate 28g / L, sodium hypophosphite 24g / L , malic acid 24g / L and succinic acid 18g / L, lead acetate 3×10 -3 g / L, temperature at 80°C, adjust the pH value to 5.8 with 10% sodium hydroxide solution, deposit nickel-phosphorus alloy on the...

Embodiment 3

[0033] Take 50g of 400 mesh mica, wash it with the pretreatment solution, treat it with a mixture of 400g / L sulfuric acid and 100g / L nitric acid for 60 minutes, filter and wash with water; then use 40g / L stannous chloride solution and hydrochloric acid to adjust the pH to 0.6~ 2, sensitize the above mica powder for 15 minutes, filter and wash with water; then use 0.5g / L palladium chloride solution and hydrochloric acid to adjust the pH to between 1.2 and 1.9, treat the sensitized mica powder for 5 minutes, filter and wash with water ; use 20g / L of sodium hypophosphite to reduce activated mica powder for 1 minute, filter and wash with water; use chemical plating solution to reduce mica powder for 2 hours, and the plating solution consists of nickel sulfate 28g / L, sodium hypophosphite 24g / L , malic acid 30g / L and succinic acid 12g / L, lead nitrate 3×10 -3 g / L, temperature at 80°C, adjust the pH value to 5.8 with 10% sodium hydroxide solution, deposit nickel-phosphorus alloy on th...

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Abstract

The invention overcomes the shortcoming that the imaging is interfered because the present black material does not have enough blackness, and provides a mica-based ultra-black material which can improve the light absorption and decrease the light reflection of the material in particular to the light wave in visible light range, and a preparation method of the mica-based ultra-black material. The mica-based ultra-black material of the invention uses mica powder with granularity of 20 to 600 meshes as matrix, whose surface is coated uniformly with a nickel-phosphorous layer. The preparation method comprises pretreatment, sensitization, activation, reduction, chemical nickel phosphor plating and corrosion of the mica powder. The prepared mica-based ultra-black material is applied in coating material of the inner wall of an optical instrument lens tubes, a solar energy absorbing device and a shell coating, and can be used as a ultra-black paint to be used in dyeing and printing process of textile products.

Description

technical field [0001] The invention relates to an inorganic ultra-black material and its preparation method and application, in particular to a mica-based ultra-black material and its preparation method and application. Background technique [0002] The light-absorbing material coated on the inner wall of the lens barrel of various optical instruments will reflect the incident light to a certain extent, interfere with the incident light, and affect the clarity of imaging, which cannot meet the imaging requirements of high-precision optical equipment and instruments; in order to prevent the lens barrel from The inner wall reflects the incident light and interferes with the imaging results, so the optical equipment needs to absorb the light that hits the inner wall of the lens barrel as much as possible to minimize the reflection of light; and the original black light-absorbing material applied to the inner wall of the lens barrel cannot meet the needs . [0003] Mica is an ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09C1/28C09C3/06C23C18/16C23C18/36C23F1/28
Inventor 闵洁方君潘建君韩玉祯府静燕刘保江孙晓强
Owner DONGHUA UNIV
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