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A kind of aluminum dihydrogen phosphate nano-micro binder and preparation method thereof

A technology of aluminum dihydrogen phosphate nano-binder and aluminum dihydrogen phosphate, which is applied in the directions of adhesives, inorganic adhesives, etc., can solve the problems of limiting the application of nanoparticles and high cost of material preparation, and achieves low preparation cost and preparation conditions. Simple, improved adhesion strength

Active Publication Date: 2015-11-25
上海钫淦冶金科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there are many methods for producing nanoparticles, including hydrothermal method, sol-gel method, mechanical ball milling method, chemical vapor deposition method, etc. The common problem of these methods is that the cost of material preparation is high, which limits the application of nanoparticles.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take 10% aluminum hydroxide, 10% water and 80% phosphoric acid, mix them evenly, and react under heating conditions at 85-100°C for 2 hours to obtain aluminum dihydrogen phosphate colloid A, and prepare colloid A into 20g / L aluminum dihydrogen phosphate Colloidal solution, add 20g / L ammonium chloride and 0.5g / L ammonium hydrogen fluoride as a template to the above solution, then place it at 80°C for 24 hours, wash the product and place it in water to mature for 10 days, The external ambient temperature is 25°C. After the matured precipitate is washed with distilled water and absolute ethanol, aluminum phosphate nanoparticles are obtained after drying in a vacuum oven. The shape of the nanoparticles is a rectangular sheet, and the thickness of the rectangular sheet is 300nm. Add 20% of the nanoparticles to 80% of the aluminum dihydrogen phosphate colloid A, and mix mechanically to obtain the aluminum dihydrogen phosphate nano-micro binder.

Embodiment 2

[0023] Take 20% aluminum hydroxide, 10% water and 70% phosphoric acid, mix them evenly, and react under heating conditions at 85-100°C for 1.5 hours to obtain aluminum dihydrogen phosphate colloid B, and prepare colloid B into 20g / L dihydrogen phosphate Aluminum colloid solution, add 1g / L ammonium dihydrogen phosphate to the above solution as a template, then place it at 90°C for 24 hours, wash the product and place it in water to mature for 7 days, the external environment temperature is 25°C, Wash the matured precipitate with distilled water and absolute ethanol, and dry it in a vacuum oven to obtain aluminum phosphate nanoparticles. The shape of the nanoparticle is cylindrical, the diameter of the bottom surface of the cylinder is 150nm, and the length is about 800nm. Add 30% of the nanoparticles to 70% of the aluminum dihydrogen phosphate colloid B, and mix mechanically to obtain the aluminum dihydrogen phosphate nano-micro binder.

Embodiment 3

[0025] Take 20% aluminum hydroxide, 20% water and 60% phosphoric acid, mix them evenly, and react under heating conditions at 85-100°C for 1 hour to obtain aluminum dihydrogen phosphate colloid C, and prepare colloid C into 20g / L aluminum dihydrogen phosphate Colloidal solution, add 5g / L ammonium sulfamate and 1g / L ammonium hydrogen fluoride as templates to the above solution, then place it at 100°C for 24 hours, wash the product and place it in water to mature for 15 days, the external environment The temperature is 25°C. After the matured precipitate is washed with distilled water and absolute ethanol, it is dried in a vacuum oven to obtain aluminum phosphate nanoparticles. The shape of the nanoparticles is a disc with a thickness of 100-300nm.

[0026] Add 40% of the nanoparticles to 60% of the aluminum dihydrogen phosphate colloid C, and mix mechanically to obtain the aluminum dihydrogen phosphate nano-micro binder.

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Abstract

The invention provides an aluminum dihydrogen phosphate nano / micro-binder and a preparation method thereof. The aluminum dihydrogen phosphate nano / micro-binder comprises, by weight, 50 to 80% of aluminum dihydrogen phosphate colloid and 20 to 50% of aluminum dihydrogen phosphate nano / micro-particles. The aluminum dihydrogen phosphate colloid comprises, by weight, 10 to 20% of aluminum hydroxide, 40 to 85% of phosphoric acid and 10 to 20% of water. A preparation method of the aluminum dihydrogen phosphate colloid comprises that aluminum hydroxide, phosphoric acid and water are mixed uniformly according to the above ratio and then undergo a reaction at a temperature of 85 to 100 DEG C under the heating condition for 1 to 2h. The aluminum dihydrogen phosphate nano / micro-particles are prepared by template-based guiding of the aluminum dihydrogen phosphate colloid. A preparation method of the aluminum dihydrogen phosphate nano / micro-particles comprises reaction and curing processes. The aluminum dihydrogen phosphate nano / micro-particles have particle sizes of 100 nanometers to 1 micron. The aluminum dihydrogen phosphate colloid and the aluminum dihydrogen phosphate nano / micro-particles are mixed uniformly into the aluminum dihydrogen phosphate nano / micro-binder according to a certain ratio by a mechanical mixing method. The aluminum dihydrogen phosphate nano / micro-binder can be used in a high temperature-resistant coating mater and a high-temperature refractory material, and has excellent cohesiveness in a high-temperature environment.

Description

technical field [0001] The invention relates to the field of binder materials, in particular to an aluminum dihydrogen phosphate nano-micro binder for high temperature resistant materials and a preparation method thereof. Background technique [0002] Aluminum dihydrogen phosphate binder is widely used in coatings, refractory materials in high-temperature kilns, equipment maintenance and sealing modification, bonding of ceramics and ceramic composite materials, casting, abrasive tools due to its wide bonding range and high bonding strength. and the military field. At present, aluminum dihydrogen phosphate binders are also used in many coating materials, but in nano-micro coatings, a large number of inorganic nanoparticles are often added to achieve the unique effect of nano-micro structures. The introduction of nano-particles from the perspective of the binder is conducive to significantly improving the bonding performance of the binder and improving the particle size match...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C09J1/00
Inventor 沈白李英霞胡羲文
Owner 上海钫淦冶金科技有限公司
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