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Preparation method of gadolinium zirconate-based material, gadolinium zirconate-based ceramic pelletizing powder for ionic spraying and preparation method of gadolinium zirconate-based ceramic pelletizing powder

A gadolinium zirconate-based and ceramic material technology, which is applied in metal material coating process, coating, fusion spraying, etc., can solve the problems of high power consumption, etc., and achieve the effect of improving densification, reducing production cost, and simple operation

Active Publication Date: 2018-05-15
INNER MONGOLIA UNIV OF SCI & TECH
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  • Application Information

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Problems solved by technology

In addition, the high-density Gd obtained by the above method 2 Zr 2 o 7 Crushing, refining and obtaining nano-scale powder requires a lot of power consumption

Method used

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  • Preparation method of gadolinium zirconate-based material, gadolinium zirconate-based ceramic pelletizing powder for ionic spraying and preparation method of gadolinium zirconate-based ceramic pelletizing powder
  • Preparation method of gadolinium zirconate-based material, gadolinium zirconate-based ceramic pelletizing powder for ionic spraying and preparation method of gadolinium zirconate-based ceramic pelletizing powder
  • Preparation method of gadolinium zirconate-based material, gadolinium zirconate-based ceramic pelletizing powder for ionic spraying and preparation method of gadolinium zirconate-based ceramic pelletizing powder

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preparation example Construction

[0043] The invention provides a preparation method of gadolinium zirconate-based ceramic material, comprising the following steps:

[0044] (1) A mixture comprising zirconia and gadolinium oxide is provided; the particle size of the mixture is below 100nm; the mixture also includes erbium oxide, and the amount of substance of the erbium oxide is the total substance of gadolinium oxide and erbium oxide [0,0.04%] of the amount;

[0045] (2) Carrying out wet sanding to the mixture according to the order of the sanding speed from low to high, to obtain sanding slurry;

[0046] (3) drying the sanding slurry obtained in the step (2) to obtain a sanding powder;

[0047] (4) Carry out atmospheric pressure sintering to the sand-milled powder that described step (3) obtains, obtain the gadolinium zirconate-based ceramic material of bulk;

[0048] Or press the sand mill powder obtained in the step (3) and carry out normal pressure sintering to obtain powdery gadolinium zirconate-based ...

Embodiment 1

[0102] (1) According to the stoichiometric ratio, Gd with a chemical purity ≥ 99.99% 2 o 3 and ZrO 2 The powder is placed in a polyurethane ball mill tank with a molar ratio of 1:2, and ball milled at a speed of 140r / min for 1 hour to meet the feed particle size requirements of the sand mill and prevent coarse particles from clogging the pipeline. Both the inner lining of the stirring ball mill and the jacket of the stirring rod are made of polyurethane, 8-10mm zirconia balls are used for the grinding body, and deionized water is used for the dispersion medium. Material passes through 80 mesh sieves.

[0103] (2) Use a sand mill to further grind the powder. The ball milling medium is deionized water, and the grinding body with a particle size of 0.3mm is zirconia beads. The mass ratio of material: balls: deionized water is 1:1.3 : 2, the amount of dispersant polymethacrylic acid amine is 0.7wt% of the raw material powder, and the speed of the sand mill is 2200r / min, 2400r / m...

Embodiment 2

[0107] (1) According to the stoichiometric ratio, Gd with a chemical purity ≥ 99.99% 2 o 3 、Er 2 o 3 and ZrO 2 The powder was placed in a polyurethane ball mill tank at a molar ratio of 0.975:0.025:2, and ball milled at a speed of 140r / min for 2 hours to meet the feed particle size requirements of the sand mill and prevent coarse particles from clogging the pipeline. Both the lining of the stirring ball mill and the jacket of the stirring rod are made of polyurethane, the grinding body uses 8-10mm zirconia balls, the dispersion medium uses deionized water, the mass ratio of material to ball is 1:2, and the mass ratio of material to water is 1:1. Material passes through 80 mesh sieves.

[0108] (2) Use a sand mill to further grind the powder. The ball milling medium is deionized water, and the grinding body with a particle size of 0.3mm is zirconia beads. The mass ratio of material: balls: deionized water is 1:1.5 : 2, the amount of dispersant polymethacrylic acid amine is...

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Abstract

The invention provides a preparation method of a gadolinium zirconate-based material, gadolinium zirconate-based ceramic pelletizing powder for ionic spraying and a preparation method of the gadolinium zirconate-based ceramic pelletizing powder. According to the preparation method, oxides are mixed and grinded at a rotation speed which is increased gradually, then large micro-grade granules of rawmaterials are gradually crushed into nano-grade powder, the powder of which the particle size is relatively uniform is made, the powder has a relatively high specific surface area, solid-phase reactions in later sintering process are carried out smoothly, or the mixed material of the powder is further pressed into blocks, then distances among mass points of the powder granules are further reduced, the pore content is reduced, the density is improved, mixed oxide blocks are prepared, the solid-phase reactions in later sintering process are carried out smoothly, the solid-phase reactions can bestill ensured without high-pressure sintering, and a stable pyrochlore structure can be prepared.

Description

technical field [0001] The invention relates to the technical field of ceramic powders, in particular to a preparation method of gadolinium zirconate-based ceramic material, gadolinium zirconate-based ceramic granulated powder for plasma spraying and a preparation method thereof. Background technique [0002] With many rare earth zirconates Ln 2 Zr 2 o 7 (Ln=La, Nd, Sm) materials compared to pyrochlore Gd 2 Zr 2 o 7 It has lower thermal conductivity, higher thermal expansion coefficient and better thermal corrosion resistance. Compared with YSZ thermal barrier coating, its ceramic coating has higher reflectivity and corrosion resistance, and uses other rare earth Elements (La, Nd, Sm, Sc, etc.) carry out Gd 3+ Bit doping can effectively increase the Gd 2 Zr 2 o 7 Therefore, gadolinium zirconate ceramic thermal barrier coating has become a new type of thermal barrier coating material with broad prospects. [0003] The preparation methods of thermal barrier coatings ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/488C04B35/626C04B35/622C23C4/11C23C4/134
CPCC04B35/488C04B35/622C04B35/6261C04B35/62645C04B35/62695C04B2235/3224C04B2235/5454C04B2235/656C04B2235/76C23C4/11C23C4/134
Inventor 宋希文谢敏包金小周芬郜建全张永和郭文荣
Owner INNER MONGOLIA UNIV OF SCI & TECH
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