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Ferric oxide whisker preparing method

A technology of iron oxide and ferroferric oxide, which is applied in the field of preparation of iron oxide whiskers, can solve the problems that hinder the commercial production of whiskers, the size of whiskers is difficult to control, and the preparation equipment is complicated, so as to achieve low production cost and no pollution , The effect of easy process conditions

Inactive Publication Date: 2019-04-05
鄄城永铭地毯有限公司
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

There have been many studies on silicon carbide whiskers, but there are many problems in the existing preparation methods of whiskers, such as complicated preparation equipment, high production cost, low purity, difficult control of the size of the whiskers, and environmental pollution. Seriously hampers the commercial production of whiskers

Method used

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Embodiment Construction

[0006] The technical solutions of the present invention will be further specifically described below through examples.

[0007] This embodiment is carried out according to the following steps: the preparation method of iron oxide whiskers in this embodiment is realized through the following steps: 1. Add the water-soluble high molecular polymer into deionized water at 90-100°C, stir and dissolve for 10 minutes, and then Add α-Si3N4 powder and sintering additives to obtain a mixture, and then ball mill the mixture for 20~30 hours to obtain a slurry with a solid phase volume content of 5%~20%, wherein the solid phase is α-Si3N4 powder and sintered Auxiliaries, the mass of sintering aids accounts for 2% to 10% of the total mass of the solid phase, and the mass of water-soluble polymers is 0.2% to 1% of the total mass of the solid phase. The sintering aids are MgO, CaO, One of BaO, Li2O, TiO2, AlN, Y2O3, Al2O3, La2O3, Yb2O3, Ce2O3, Nd2O3 and SiO2 or a combination of several of the...

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Abstract

Disclosed is a ferric oxide whisker preparing method. The ferric oxide whisker preparing method solves the problems complicated preparation equipment, high in production cost, environmental pollution,whisker size control difficulty and low purity of prepared whiskers in existing whisker preparing methods. The method comprises mixing and ball-milling ferric oxide powder, sintering additives, water-soluble high-molecular polymers and water into a slurry; then dropwise adding the slurry into a freezing medium through a conical nozzle to obtain solid spherical slurry particles; freeze-drying thesolid spherical slurry particles inside a freezing machine to obtain a whisker precursor, and sintering of the whisker precursor inside an atmosphere sintering furnace. The ferric oxide whisker preparing method combines freeze forming and high-temperature sintering, thereby being simple in technical implementation, saving complicated equipment and being low in production costs and free from environmental pollution, and meanwhile, being controllable in whisker size and high in yield and purity.

Description

technical field [0001] The invention belongs to the technical field of whisker preparation, and in particular relates to a method for preparing iron oxide whiskers. Background technique [0002] Whiskers are short fibers grown from high-purity single crystals. Its mechanical strength is equal to the force between adjacent atoms. The highly oriented structure of whiskers not only makes them have high strength, high modulus and high elongation, but also has electrical, optical, magnetic, dielectric, conductive, and superconductive properties. The strength of whiskers is much higher than that of other chopped fibers, and it is mainly used as a reinforcement of composite materials for the manufacture of high-strength composite materials. The materials for making whiskers are divided into three categories: metals, ceramics and polymer materials. There have been many studies on silicon carbide whiskers, but there are many problems in the existing preparation methods of whiskers...

Claims

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Application Information

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IPC IPC(8): C04B35/622C04B35/64
CPCC04B35/62231C04B35/64C04B2235/3203C04B2235/3205C04B2235/3206C04B2235/3208C04B2235/3224C04B2235/3225C04B2235/3227C04B2235/3229C04B2235/3232C04B2235/3418C04B2235/3865C04B2235/3878C04B2235/6567C04B2235/658
Inventor 黄勇
Owner 鄄城永铭地毯有限公司
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