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A kind of preparation method of gradient pore structure zirconia high temperature insulation material

A zirconium dioxide and heat insulating material technology is applied in the field of preparation of zirconium dioxide materials with a gradient pore structure, which can solve the problems of shortening the service life of the material, poor fracture toughness, small plastic deformation, etc., and achieves simple process operation. Effect

Active Publication Date: 2016-07-13
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The shape of the prepared product is regular, and the internal structure of the material is uniform, but it is not conducive to the preparation of special-shaped products and large-scale products; and during the use of the product, due to the uniform internal structure of the material, the amount of plastic deformation is small, and the fracture toughness is poor during the use of the product. material life

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1.1. Preparation of slurry: use acrylamide as monomer, methylene bisacrylamide as crosslinking agent, ammonium polyacrylate as dispersant, water as dispersion medium, and the quality of water, acrylamide and methylene bisacrylamide The ratio is 100:10:5, the mass ratio of zirconium dioxide powder to water is 4:1, and the ball mill is mixed for 50 minutes to prepare zirconium dioxide slurry with uniform dispersion, stability and good fluidity. The dispersant is zirconium dioxide powder. 1% of quality.

[0030] 1.2. Forming and drying: Pour the slurry into a mixing tank, add polystyrene foam microspheres of different particle sizes, the volume ratio of pore former to slurry is 1:9, and the volume ratio of microspheres of different particle sizes is: 1:2:3(mm)=40:40:20. The initiator ammonium persulfate and the catalyst tetramethylethylenediamine are added. The addition amounts of ammonium persulfate and tetramethylethylenediamine are respectively 1% and 8% of the mass of th...

Embodiment 2

[0033] 1.1. Preparation of slurry: use carboxymethacrylate amine as monomer, polyhexamethylene glycol dimethacrylate amine as crosslinking agent, sodium tripolyphosphate as dispersant, water as dispersion medium, zirconium dioxide powder The mass ratio of body to water is 1:1, in which the mass ratio of water, carboxymethacrylic acid amine and polyhexamethylene glycol dimethacrylic acid amine is 100:30:1, ball milling and mixing for 20 minutes, the preparation is uniform, stable and flowing The zirconium dioxide slurry with good properties, the dispersant is 0.1% of the mass of zirconium dioxide powder.

[0034] 1.2. Forming and drying: Pour the slurry into a mixing tank, add polyethylene foam microspheres of different particle sizes, the volume ratio of pore former to slurry is 1:1, and the volume ratio of microspheres of different particle sizes is: 1 :2:3(mm)=50:30:20. Add the initiator potassium persulfate and the catalyst tetramethylethylenediamine, the addition amount is 1...

Embodiment 3

[0037] 1.1. Preparation of slurry: amine methacrylate as monomer, polyethylene glycol dimethacrylate as crosslinking agent, sodium hexametaphosphate as dispersant, water as dispersion medium, zirconium dioxide powder and water The mass ratio is 3:2, in which the mass ratio of water, methacrylate amine and polyethylene glycol dimethacrylate is 100:10:5, ball milling and mixing for 30 minutes to prepare uniformly dispersed, stable, and fluid zirconium dioxide Slurry, where the dispersant is 0.5% of the mass of the zirconium dioxide powder.

[0038] 1.2. Forming and drying: pour the slurry into a mixing tank, add polyurethane microspheres of different particle sizes, the volume ratio of pore former to slurry is 3:7, and the volume ratio of microspheres of different particle sizes is 1:2 :3(mm)=40:30:30. Add the initiator potassium persulfate and the catalyst tetramethylethylenediamine, the added amounts are respectively 1% and 3% of the organic monomer, stir evenly, and pour into t...

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PUM

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Abstract

The invention relates to the field of inorganic non-metallic materials, and is a method for preparing a gradient pore structure zirconia high-temperature heat insulation material by using a centrifugal process combined with a rapid in-situ solidification technology. Water, organic monomers, crosslinking agents, and powder raw materials are mixed. , add pore-forming agent, initiator, catalyst, mix, centrifuge, in-situ solidify, and make a green body in which the internal material pore-forming agent is arranged in order of different particle sizes, and obtain a heat-insulating material with gradient pore structure after drying and firing . Compared with traditional preparation methods, the internal pore size and pore structure arrangement of the material can be regulated, related products can be prepared according to different performance requirements, and special-shaped products can be prepared to meet different needs.

Description

Technical field [0001] The invention relates to the field of inorganic non-metallic materials, in particular to a method for preparing a zirconium dioxide material with a gradient pore structure. Background technique [0002] In the field of high temperature energy saving, the performance of thermal insulation materials determines energy saving and thermal insulation performance and high temperature use performance. Therefore, thermal insulation materials must have high porosity, low thermal conductivity, high temperature strength, good chemical stability and good thermal shock resistance. Excellent performance, thermal insulation material with gradient pore structure can further improve the thermal shock resistance of the material, and the mechanical strength of the material changes gradually to meet a wider range of special needs. [0003] Zirconia material has the characteristics of high melting point, high structural strength at high temperature, good chemical stability, and co...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B38/06C04B35/48C04B35/622
Inventor 姜欣刘国齐王刚袁波韩建燊
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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