Nano structure yttrium stabilized zirconium oxide aggregated powder and its producing method

A technology of yttrium-stabilized zirconia and nano-zirconia, which is applied in the direction of titanium dioxide, titanium oxide/hydroxide, etc., can solve the problems that the actual application of production is too far from the scale, the production cost is increased, and it is difficult to achieve scale. Effects of eliminating relaxation and internal stress, low cost, and easy promotion
CN1587062AInactive Publication Date: 2005-03-02湖北葛店开发区地大纳米材料制造有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
湖北葛店开发区地大纳米材料制造有限公司
Publication Date
2005-03-02
Estimated Expiration
Not applicable · inactive patent

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Abstract

The nanometer structure yttrium stabilized aggregated zirconium oxide powder consists of nanometer crystal particle of size smaller than 100 nm and is in aggregated powder structure in granularity of 40-90 microns. Inside the aggregated structure, the nanometer zirconium oxide particles are contacted partially with pure cavity inside. The production process includes adding water into nanometer zirconium oxide particle containing yttrium oxide to obtain aquatic suspended colloid, and subsequent spray drying, sieving, heat treatment and plasma densifying. The production process is simple, low in cost, continuous and suitable for industrial production, and the product is suitable for plasma spraying, flame spraying, etc. and may be used in preparing various kinds of heat resisting coating, wear resisting coating and anticorrosive coating in various industry.
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Description

technical field

[0001] The invention relates to a nanostructured yttrium-stabilized zirconia agglomerated powder material and a production method thereof. The powder material is particularly suitable for preparing thermal barrier coatings by thermal spraying (plasma spraying or flame spraying) or structural ceramics by high-temperature sintering. Background technique

[0002] Zirconia (ZrO 2 ) has excellent physical and chemical properties and is an important structural and functional ceramic material. Ordinary zirconia exists in a monoclinic phase at room temperature to 1170 °C, transforms into a tetragonal phase when heated to 1170-2370 °C, and transforms from a tetragonal phase to a cubic phase (melting at about 2700 °C) above 2370 °C. Since the high temperature phase (cubic phase or tetragonal phase) of pure zirconia will transform into a low temperature phase (monoclinic phase) as the temperature decreases, accompanied by a volume expansion of ab...

Claims

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