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Method for preparing nano-crystalline and amorphous composite structure yttrium oxide stabilization zirconium oxide spherical powder

A technology for stabilizing zirconia and composite structure, which is applied in the field of preparing high-performance thermal barrier coating by plasma spraying, and preparing nanocrystalline and amorphous composite structure yttria-stabilized zirconia spherical powder, achieving easy mass production, high technical content, Simple production process

Active Publication Date: 2008-01-09
GRIPM ADVANCED MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, there is no research or patent report on yttria-stabilized zirconia spherical powder materials with high-performance nanocrystalline and amorphous composite structures

Method used

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  • Method for preparing nano-crystalline and amorphous composite structure yttrium oxide stabilization zirconium oxide spherical powder
  • Method for preparing nano-crystalline and amorphous composite structure yttrium oxide stabilization zirconium oxide spherical powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Take 100kg of zirconium oxychloride and 4.86kg of yttrium chloride crystal powder, add 2000kg of deionized water, and stir evenly to obtain a uniform solution. Add 700kg of ammonia solution with a concentration of 5wt% to the solution, co-precipitate to obtain a gel and perform 2h aging treatment, and obtain about 350kg of stable gel after filtration and washing.

[0040] According to the weight ratio of 1:1, add 350kg of absolute ethanol, after stirring ball milling for 2 hours, and ultrasonically dispersing for 1 hour, a uniform and stable slurry is obtained.

[0041] The uniform and stable gel slurry is spray-dried and granulated by centrifugal spray drying. The inlet temperature is 330°C, the outlet temperature is 170°C, the rotational speed of the centrifugal atomizing disc is 9000r / min, and the cyclone separator is used to collect the granulated product. powder material.

[0042] The granulated powder material was sintered in a muffle furnace at 650°C for 4h. Th...

Embodiment 2

[0045] Take 100kg of zirconium carbonate and 7.61kg of yttrium carbonate crystal powder, add 2000kg of deionized water, and stir evenly to obtain a uniform solution. Add 900kg of ammonia solution with a concentration of 5wt.% to the solution, co-precipitate to obtain a gel and perform 2h aging treatment, and obtain about 390kg of stable gel after filtration and washing.

[0046] According to the weight ratio of 1:1, 390 kg of absolute ethanol was added, and after stirring ball milling for 2 hours and ultrasonic dispersion for 2 hours, a uniform and stable slurry was obtained.

[0047] The uniform and stable gel slurry is spray-dried and granulated by centrifugal spray drying. The inlet temperature is 330°C, the outlet temperature is 170°C, the rotational speed of the centrifugal atomizing disc is 9000r / min, and the cyclone separator is used to collect the granulated product. powder material.

[0048] The granulated powder material is subjected to high-temperature rapid sinter...

Embodiment 3

[0051] Take 100kg of zirconium nitrate and 1.9kg of yttrium nitrate crystal powder, add 2000kg of deionized water, and stir evenly to obtain a uniform solution. Add 600kg of ammonia solution with a concentration of 5wt.% to the solution, co-precipitate to obtain a gel and perform 2h aging treatment, and obtain about 330kg of a stable gel after filtration and washing.

[0052] According to the weight ratio of 1:1, add 330kg deionized water, 30ml ethylene glycol 600 or ethylene glycol 800, 2000ml PVA or CMC, after stirring ball milling for 3 hours, and ultrasonic dispersion for 1 hour, a uniform and stable slurry is obtained.

[0053] The uniform and stable gel slurry is spray-dried and granulated by centrifugal spray drying. The inlet temperature is 330°C, the outlet temperature is 170°C, the rotational speed of the centrifugal atomizing disc is 9000r / min, and the cyclone separator is used to collect the granulated product. powder material.

[0054] The granulated powder mater...

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Abstract

This invention discloses a method for preparing yttria with its weight percentages of 2-24wt% doped Zirconia nanometer crystal and noncrystal co-constitutive ball-shaped ceramics powder, including cubic phase, tetragonal phase, monoclinic phase nanometer crystal and amorphous, with the complex structure of: even distribution of nanometer crystal and amorphous and nanometer crystal coated with amorphous. The production procedures comprise: coprecipitation, gelatin being slurried, spray-drying, low middle temperature amorphous sintering and high temperature quick surface sintering. This method is of simple process, simple equipment, low cost and can be commercial production. This inventive powder is suitable for parlicularly thermal barrier coating, fuel cell coating, oxygen-sensing coating, corrosion-resistant coating, abrasion-resistant coating; used for manufacturing oxygen-sensor, ceramic-plate of integrated circuit, in aerospace fields.

Description

technical field [0001] The invention belongs to the technical field of preparation of nanocrystalline and amorphous composite structure powder materials, in particular to a method for preparing yttria-stabilized zirconia spherical powder with nanocrystalline and amorphous composite structure. Specifically, the powder material is particularly suitable for preparing high-performance thermal barrier coatings by plasma spraying. At the same time, the powder material can also be used in other spraying (plasma spraying, supersonic flame spraying, explosive spraying, cold spraying) processes to prepare fuel cell electrode coatings, oxygen sensor coatings, corrosion-resistant and erosion-resistant coatings and other functional coatings And it is used for pressing and forming, high-temperature sintering process to prepare various ceramic devices such as oxygen-sensitive sensors and integrated circuit ceramic substrates. Background technique [0002] Yttria-stabilized zirconia cerami...

Claims

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Application Information

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IPC IPC(8): C04B35/488
Inventor 林锋杨中元李学锋张敬国庞鹏沙闫世凯张景怀汪礼敏
Owner GRIPM ADVANCED MATERIALS CO LTD
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