Preparation method for spherical aluminum oxide powder

A spherical alumina and alumina powder technology, applied in the field of chemistry, can solve the problems of easy agglomeration or fusion between particles, complex equipment engineering, low spheroidization rate, etc., and achieve high α-phase alumina content and smooth particle surface. , the effect of high filling density
CN107117635AInactive Publication Date: 2017-09-01SUZHOU NANODISPERSIONS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SUZHOU NANODISPERSIONS
Publication Date
2017-09-01
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention discloses a preparation method for nano-scale and micro-scale spherical aluminum oxide powder. According to the invention, the manner of combining a sol-gel technology with an emulsion method is utilized to prepare the spherical aluminum oxide; a water-based aluminum sol is used as a main raw material; an organic reagent is used as a dispersion medium; the spherical aluminum oxide is compounded in the manner of water-in-oil emulsion polymerization; the interfacial tension between an oil phase and a water phase is utilized to manufacture a tiny spherical droplet; and the formation of a water-phase sol particle and the gel is limited in the tiny droplet. The raw material components of the spherical aluminum oxide according to the technology are convenient for design; the particle size of the powder is within the scope of 0.5-100mu m and is adjustable; the spheroidization rate is high; the liquidity is excellent; and the dispersion is easy.
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Description

technical field

[0001] The invention relates to the field of chemical technology, in particular to the field of material technology, in particular to a method for preparing spherical alumina powder. Background technique

[0002] Alumina powder has excellent physical and chemical properties, and is widely used in the fields of electronics, petrochemical, refractory materials, ceramics, grinding, pharmaceuticals, catalysis, and aerospace. The characteristics and application fields of alumina powder are closely related to its particle morphology. Common alumina powders are mostly worm-like, square-shaped and hollow flocculent, which makes alumina powder prone to uneven particle size and dispersion. Poor performance, easy reunion, poor fluidity and other defects. Among the different shapes of alumina powder, spherical alumina powder has regular shape, reasonable particle size distribution, large bulk density, small specific surface area and good fluidity, which can greatly impr...

Claims

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