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Electroconductive woodceramic powder and its manufacturing method

A technology of wood ceramics and conductive powder, which is applied in the field of wood ceramic materials and its preparation, can solve the problems of high brittleness and easy cracking, and achieve the effects of improving shielding effect, reducing costs and expanding the scope of application

Inactive Publication Date: 2012-06-27
NORTHEAST FORESTRY UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention aims to solve the technical problem of high brittleness and easy cracking of the existing massive wood ceramic materials, and provides a conductive wood ceramic powder and its manufacturing method

Method used

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  • Electroconductive woodceramic powder and its manufacturing method
  • Electroconductive woodceramic powder and its manufacturing method

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specific Embodiment approach 1

[0021] Specific embodiment one: a kind of conductive wood ceramic powder of this embodiment takes wood ceramic powder as the core body, and the conductive powder body of a layer of metal film is chemically plated on the surface of the core body, and the adhesion amount of metal is the quality of wood ceramic powder. 1% to 50%; the metal is nickel, iron or cobalt.

[0022] The conductive wood ceramic powder of this embodiment is a wood ceramic powder / metal composite core-shell type composite material. The combination of metal and porous wood ceramic powder can effectively absorb electromagnetic waves, especially for broadband 100KHz-30000MHz electromagnetic waves. absorb. It can be used as a conductive filler for the preparation of electromagnetic shielding materials. This conductive filler is easy to disperse evenly and can establish a good conductive network. The porous structure of wood ceramics can make electromagnetic waves reflect and absorb multiple times inside it, resu...

specific Embodiment approach 2

[0023] Embodiment 2: This embodiment is different from Embodiment 1 in that: the amount of metal attached is 5% to 40% of the mass of the wood ceramic powder. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0024] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is: the preparation method of the wood ceramic powder as the core is carried out as follows: the biomass raw material is dried at a temperature of 30 ° C to 100 ° C to Dry, then sinter the dried biomass raw material at a temperature of 600°C to 2500°C for 2h to 10h in a vacuum environment or under the protection of an inert gas, and then use a ball mill to crush it to a particle size of 0.1μm to 200μm to obtain wood ceramic powder as a core wherein the biomass raw material is wood, walnut shell, bamboo, rice husk, coffee grounds, tea grounds, tobacco rods, bagasse, lignin or waste paper. Others are the same as in the first or second embodiment.

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Abstract

Relating to woodceramic materials and their preparation methods, the invention provides electroconductive woodceramic powder and its manufacturing method, and solves the technical problems of great brittleness and easy cracking in bulk woodceramic materials. The electroconductive woodceramic powder of the takes woodceramic powder as the core, the surface of which is chemically plated with electroconductive powder of a layer of metal film, and the metal attaching amount is 1%-50% of the mass of the woodceramic powder, wherein, the metal is nickel, iron or cobalt. The preparation method consists of: subjecting the woodceramic powder to oil removal, oxidation, sensitization, activation, and dispergation, then placing the woodceramic powder into a chemical plating solution for chemical plating, and conducting filtration and washing by deionized water to neutral, then carrying out drying, thus obtaining the electroconductive woodceramic powder with volume resistivity of 4.5*10<-2>omega.cm-5.5*10<-1>omega.cm. The electroconductive woodceramic powder in the invention can be added into coatings for preparing electroconductive coatings, or the powder can be added into resin-based materialsfor preparing molding materials, thus having a wide application range. The electroconductive woodceramic powder in the invention can be used as an electromagnetic shielding material.

Description

technical field [0001] The present invention relates to wood ceramic material and its preparation method. Background technique [0002] All electrical equipment will generate electromagnetic waves during operation, resulting in electromagnetic radiation. Electromagnetic radiation will cause harm to instruments and equipment, and also have adverse effects on human health. The World Health Organization has listed electromagnetic pollution as the fourth largest public hazard after air pollution, water pollution, and noise pollution. Existing studies have shown that the hazards of electromagnetic radiation mainly include: (1) endangering information security, making computers and other instruments no information security guarantee. (2) Cause serious interference to the execution process of high-precision instruments and equipment. (3) Harmful to human health. Severe electromagnetic pollution can cause various diseases. Therefore, for some places and equipment that need to en...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/628C04B38/00
Inventor 陶毓博李鹏李淑君赵佳宁
Owner NORTHEAST FORESTRY UNIVERSITY
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