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Nano-micro-lattice phase separation electric heating material and preparation method thereof

A technology of nanocrystalline and electrothermal materials, applied in heating element materials, nanotechnology, nanotechnology and other directions, can solve problems such as hindering the utilization rate of thermal energy, decrease in heating capacity, small contact area, etc., to improve the efficiency of electrothermal conversion and rapid temperature rise Effect

Active Publication Date: 2019-06-28
深圳市金光宝光电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Heating through this kind of cable needs to be transformed into planar heating in the end, but from the wire rod-shaped heating element to the planar heating surface, due to the small contact area between the wire and the surface, it is a typical unfavorable interface structure for heat conduction, in which a huge contact heat is formed. Resistance, which greatly hinders the utilization rate of thermal energy; the other is made by mixing a variety of heating materials through adhesives and spraying them on the substrate. This kind of electrothermal material is prone to ionization and chemical Reaction, long-term use will easily lead to a decrease in heating capacity and a shorter service life; scientific research has found that two different components grow alternately in thin layers of several nanometers to tens of nanometers and maintain strict periodicity. Potential wells of electrons or holes with obvious quantum confinement effects, this type of structure is called a superlattice structure, and most superlattice structures are currently used in thermoelectric materials to study how to convert thermal energy into electrical energy, and science has also discovered that , under the action of rare earth oxides, two specific heavy metal nano-films have excellent electrothermal performance after energization, and can perform electrothermal action at low voltage. Researchers call this type of microlattice structure. The microlattice structure is a very potential electrothermal structure, and the microlattice structure is mainly used in electrothermal materials

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  • Nano-micro-lattice phase separation electric heating material and preparation method thereof
  • Nano-micro-lattice phase separation electric heating material and preparation method thereof
  • Nano-micro-lattice phase separation electric heating material and preparation method thereof

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preparation example Construction

[0029] A preparation method for preparing a nano-micro-lattice phase-separated electrothermal material, the preparation method comprising the following steps:

[0030] (1) Wash the silicon substrate with ethanol for 4 times, dry it, heat the substrate until the temperature reaches 600°C, and blow the silicon substrate clean with high-purity nitrogen.

[0031] (2) Water-based silicon carbide composite nano-colloids are obtained by wet ball milling silicon carbide nano-powders, and the water-based colloids are made into micron-scale agglomerated powders by spray granulation process, and the silicon carbide composite nano-powders after spray granulation The body is heat-treated, and the heat-treated silicon carbide is sprayed onto the silicon base to form a transition layer 2 by using a spraying equipment. Since silicon carbide is a semiconductor, the resistance of silicon carbide is high when the temperature is low, but the resistance is low when the temperature is high. In the ...

Embodiment 1

[0040] Example 1: 5mm thick silicon substrate layer 1, 3μm silicon carbide transition layer 2, microlattice electric heating layer 3, the thickness of the tungsten layer is 5nm, the thickness of the titanium layer is 10nm, the thickness of the rare earth oxide layer is 2nm, the microlattice electric heating layer Layer 3 The number of layers is 1 layer, the insulation and heat insulation layer 4 with a thickness of 3mm.

Embodiment 2

[0041] Example 2: 5mm thick silicon base layer 1, 4μm silicon carbide transition layer 2, microlattice electric heating layer 3, the thickness of the tungsten layer is 7nm, the thickness of the titanium layer is 14nm, the thickness of the rare earth oxide layer is 3nm, the microlattice electric heating layer Layer 3 The number of layers is 3 layers, and the insulation and heat insulation layer 4 with a thickness of 3 mm.

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Abstract

The invention relates to the technical field of electric heating materials, in particular to a nano-micro-lattice phase separation electric heating material and a preparation method thereof. The electric heating plate comprises a base body layer, a transition layer, a micro-lattice electric heating layer and an insulation and heat insulation layer, wherein the base body layer, the transition layer, the micro-lattice electric heating layer and the insulation and heat insulation layer are stacked sequentially. The base body layer is a silicon base body layer, and the transition layer is a silicon carbide transition layer with the thickness of 3-5 microns. The micro-lattice electric heating layer is formed by a titanium layer, a rare earth oxide layer and a tungsten layer formed by sequentially depositing titanium, rare earth oxide and tungsten elementary substance nano-powder particles on the transition layer. According to the invention, the nano titanium and nano tungsten are depositedon the transition layer, and rare earth oxide is sprayed between the titanium layer and the tungsten layer to hinder dislocation movement of the nano titanium and the nano tungsten in the conducting process, thereby improving the electric heating conversion efficiency; the silicon carbide transition layer is added between the base body layer and the micro-lattice electric heating layer, so that the nano micro-lattice phase separation electric heating material can be rapidly heated.

Description

technical field [0001] The invention relates to the technical field of electrothermal materials, in particular to a nano-micro-lattice phase-separated electrothermal material and a preparation method thereof. Background technique [0002] Electric heating technology is currently a very widely used means of providing heat energy, especially in the fields of household heating, industrial and agricultural heat preservation and protection. In the prior art, there are generally two types of electric heating materials. One is heating elements such as metal resistance wires, such as metal resistance wires and carbon fiber heating cables used in existing electric floor heaters and electric blankets. Heating through this kind of cable needs to be transformed into planar heating in the end, but from the wire rod-shaped heating element to the planar heating surface, due to the small contact area between the wire and the surface, it is a typical unfavorable interface structure for heat ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H05B3/20H05B3/12H05B3/10C09D163/00C09D5/25C09D7/61B82Y30/00
CPCY02P20/10
Inventor 江宇锋罗浩
Owner 深圳市金光宝光电有限公司