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Multilayer nanocrystalline compact gadolinium zirconate ceramic insulating layer based on metal bonding layer

A metal bonding layer and ceramic insulation technology, which is applied in the field of functional ceramic materials, can solve the problems of incompatibility between density and grain size, and the high-temperature thermal stability and mechanical properties of gadolinium zirconate ceramics are greatly affected, and achieve crystal Stable particle size, good dispersion and good crystallinity

Inactive Publication Date: 2017-05-31
DONGGUAN JIAQIAN NEW MATERIAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the density and grain size of gadolinium zirconate ceramics have a great influence on the high temperature thermal stability and mechanical properties of gadolinium zirconate ceramics. However, there are few studies on the preparation and application of nanocrystalline gadolinium zirconate ceramics. Incompatibility between density and grain size

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] A multi-layer nanocrystalline dense gadolinium zirconate ceramic insulating layer based on a metal bonding layer has a thickness of 300 μm, and sequentially includes a nanocrystalline dense gadolinium zirconate ceramic layer, a metal bonding layer and a zirconia ceramic layer from outside to inside, wherein The nanocrystalline dense gadolinium zirconate ceramic layer is obtained by discharge plasma sintering of gadolinium zirconate nanopowder with a particle size of 6-12nm and a specific surface area of ​​not less than 87m2 / g. The components in the metal bonding layer are calculated by weight percentage , including 10% cobalt, 20% chromium, 10% aluminum, 0.2% yttrium, 1% uranium, and the rest is nickel, and the zirconia ceramic layer also includes 5% yttrium by weight.

[0026] Wherein, the preparation method of the nanocrystalline dense gadolinium zirconate ceramic layer is:

[0027] (1) At 5°C, add gadolinium nitrate hexahydrate and zirconium oxychloride octahydrate a...

Embodiment 2

[0031] A multilayer nanocrystalline dense gadolinium zirconate ceramic insulating layer based on a metal bonding layer has a thickness of 400 μm, and sequentially includes a nanocrystalline dense gadolinium zirconate ceramic layer, a metal bonding layer and a zirconia ceramic layer from outside to inside, wherein The nanocrystalline dense gadolinium zirconate ceramic layer is obtained by discharge plasma sintering of gadolinium zirconate nanopowder with a particle size of 6-12nm and a specific surface area of ​​not less than 87m2 / g. The components in the metal bonding layer are calculated by weight percentage , including 15% cobalt, 25% chromium, 13% aluminum, 0.5% yttrium, 3% uranium, and the rest is nickel, and the zirconia ceramic layer also includes 7% yttrium by weight.

[0032] Wherein, the preparation method of the nanocrystalline dense gadolinium zirconate ceramic layer is:

[0033] (1) At 18°C, add gadolinium nitrate hexahydrate and zirconium oxychloride octahydrate a...

Embodiment 3

[0037] A multi-layer nanocrystalline dense gadolinium zirconate ceramic insulating layer based on a metal bonding layer has a thickness of 350 μm, and sequentially includes a nanocrystalline dense gadolinium zirconate ceramic layer, a metal bonding layer and a zirconia ceramic layer from outside to inside, wherein The nanocrystalline dense gadolinium zirconate ceramic layer is obtained by discharge plasma sintering of gadolinium zirconate nanopowder with a particle size of 6-12nm and a specific surface area of ​​not less than 87m2 / g. The components in the metal bonding layer are calculated by weight percentage , including 12% cobalt, 23% chromium, 11% aluminum, 0.3% yttrium, 2% uranium, and the rest is nickel, and the zirconia ceramic layer also includes 6% yttrium by weight.

[0038] Wherein, the preparation method of the nanocrystalline dense gadolinium zirconate ceramic layer is:

[0039] (1) At 22°C, add gadolinium nitrate hexahydrate and zirconium oxychloride octahydrate ...

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Abstract

The invention provides a multilayer nanocrystalline compact gadolinium zirconate ceramic insulating layer based on a metal bonding layer. The multilayer nanocrystalline compact gadolinium zirconate ceramic insulating layer sequentially comprises a nanocrystalline compact gadolinium zirconate ceramic layer, the metal bonding layer and a zirconium oxide ceramic layer from outside to inside, wherein the nanocrystalline compact gadolinium zirconate ceramic layer is obtained by carrying out spark plasma sintering on gadolinium zirconate nanopowder which has the particle size of 6-12nm and the specific surface area of not smaller than 87m<2> / g; the metal bonding layer comprises cobalt, chromium, aluminum, yttrium, osmium and nickel. The multilayer nanocrystalline compact gadolinium zirconate ceramic insulating layer based on the metal bonding layer is excellent in thermal insulating property, high in density, free from cracking and good in mechanical properties, and has good performance stability at high temperature, thus being used for multiple aspects such as catalysts, thermal barrier coatings, solid electrolyte and high-level waste curing.

Description

technical field [0001] The invention belongs to the technical field of functional ceramic materials, and in particular relates to a multilayer nanocrystalline dense gadolinium zirconate ceramic insulating layer based on a metal bonding layer. Background technique [0002] Gadolinium zirconate has a cubic crystal structure, low thermal conductivity, high high-temperature ionic conductivity, low oxygen diffusivity, excellent radiation resistance, and excellent high-temperature thermal stability. Therefore, gadolinium zirconate ceramics are a kind of comprehensive performance. High-temperature ceramic materials have excellent physical and chemical properties, and are widely used in catalysts, thermal barrier coatings, solid electrolytes, and solidification of high-level radioactive waste. [0003] Chinese patent CN101313080B discloses a layer system containing gadolinium-mixed crystal-pyrochlore phase. The layer system has a substrate, an inner ceramic layer, a metal bonding la...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622C04B35/64C04B37/00
CPCC04B35/48C04B35/622C04B35/64C04B37/006C04B2235/3224C04B2235/3225C04B2235/666C04B2235/77C04B2235/781C04B2237/123C04B2237/348
Inventor 王海燕
Owner DONGGUAN JIAQIAN NEW MATERIAL TECH CO LTD
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