Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

a tio 2 Base electrothermal coating and preparation method thereof

A coating and electric heating technology, applied in the coating, electric heating device, ohmic resistance heating and other directions, can solve the problems of uneven heating and short life, and achieve the effect of restoring the heating effect, low cost and improving the uniformity of heating

Active Publication Date: 2022-07-29
GUANGDONG INST OF NEW MATERIALS
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problems of uneven heating and short service life caused by traditional resistance wires or metal electrothermal coatings, and to obtain a more uniform and dense structure with a higher content of oxygen-deficient phases, which can be stable at higher temperatures Electrothermal coatings in service

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • a tio <sub>2</sub> Base electrothermal coating and preparation method thereof
  • a tio <sub>2</sub> Base electrothermal coating and preparation method thereof
  • a tio <sub>2</sub> Base electrothermal coating and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] a TiO 2 Base electrothermal coating, its preparation method is as figure 1 shown, including the following steps:

[0044] (1) Degrease and degreasing the substrate, roughen the surface by sandblasting until the surface roughness Ra>3μm and preheat treatment, spray NiCr bonding layer with a thickness of 100μm and MgAl with a thickness of 200μm in turn 2 O 4 insulating layer;

[0045] (2) in MgAl 2 O 4 A ceramic heating layer is prepared on the surface of the insulating and heat insulating layer. The material of the ceramic heating layer is TiO 2 -40wt%MgAl 2 O 4 . Among them, TiO 2 Grain size 15-45μm, MgAl 2 O 4 The particle size is 10-45 μm. The spraying chamber is evacuated to below 100Pa, and then filled with a protective atmosphere to make the pressure in the spraying chamber 6kPa, the current of the plasma spray gun is 600A, the argon gas is 45L / min, the hydrogen gas is 12L / min, the spray distance is 270mm, and the gun speed is 400mm / s to obtain a cer...

Embodiment 2

[0051] a TiO 2 Base electrothermal coating, its preparation method comprises the steps:

[0052] (1) Degrease and degreasing the substrate, roughen the substrate by sandblasting until the surface roughness Ra>3μm and preheat treatment, spray NiAl bonding layer with a thickness of 120μm and Al with a thickness of 250μm in turn 2 O 3 insulating layer;

[0053] (2) in Al 2 O 3 A ceramic heating layer is prepared on the surface of the insulating and heat insulating layer. The material of the ceramic heating layer is TiO 2 -30wt% Al 2 O 3 . Among them, TiO 2 The particle size is 15-45μm, Al 2 O 3The particle size is 5-22 μm. The spraying chamber is evacuated to below 100Pa, and then filled with a protective atmosphere to make the pressure in the spraying chamber 13kPa, the current of the plasma spray gun is 620A, the argon gas is 42L / min, the hydrogen gas is 10L / min, the spray distance is 240mm, and the gun speed is 300mm / s to obtain a ceramic heating layer with a thi...

Embodiment 3

[0058] a TiO 2 Base electrothermal coating, its preparation method comprises the steps:

[0059] (1) Degrease and degreasing the substrate, roughen the substrate by sandblasting until the surface roughness Ra>3μm and preheat treatment, spray NiCrAlY adhesive layer with thickness of 90μm and YSZ insulation layer with thickness of 180μm in turn;

[0060] (2) A ceramic heating layer is prepared on the surface of the YSZ insulating layer. The material of the ceramic heating layer is TiO 2 -45wt% YSZ. Among them, TiO 2 The particle size is 10-45 μm, and the YSZ particle size is 22-45 μm. The spraying chamber is evacuated to below 100Pa, and then filled with a protective atmosphere to make the pressure in the spraying chamber 30kPa, the current of the plasma spray gun is 650A, the argon gas is 42L / min, the hydrogen gas is 9L / min, the spray distance is 180mm, and the gun speed is 500mm. / s to obtain a ceramic heating layer with a thickness of 260 μm;

[0061] (3) Preparation of...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
thicknessaaaaaaaaaa
Login to View More

Abstract

The invention discloses a kind of TiO 2 A base electrothermal coating and a preparation method thereof, the electrothermal coating coated on the surface of the base body sequentially comprises an adhesive layer, an insulating and heat-insulating layer, a ceramic heating layer and an insulating and thermally conductive protective layer from bottom to top, and electrodes embedded at both ends of the ceramic heating layer are provided. and the terminals on it are connected to the power supply. The ceramic heating coating material is TiO 2 Base ceramic material, dopant including Al 2 O 3 , MgAl 2 O 4 , Cr 2 O 3 , at least one of YSZ, and control the resistance value and heating effect by regulating the thickness of the coating and the dopant material and ratio. The electrothermal coating has good interlayer bonding, uniform and dense structure, fast heating speed and uniform temperature distribution, and can meet the requirements of long-term stable operation at temperatures below 350° C. under the condition of low energy consumption; and the preparation method has high efficiency and low cost, and the preparation process is environmentally friendly. Friendly and pollution-free.

Description

technical field [0001] The present invention relates to the field of heating technology, and in particular to a kind of TiO 2 Base electrothermal coating and preparation method thereof. Background technique [0002] Electric heating devices are widely used in many fields of national production and life and national defense construction. The traditional electric heating method mainly uses a heating wire arranged inside the substrate as a heating body, and the heat generated by the heating wire is transferred to the outer surface through the base material, so there are usually complex structures, uneven temperature distribution, low energy utilization, high cost and use. short life, etc. In addition, in order to maintain a certain temperature on the surface of the substrate, the internal temperature will inevitably be too high and the temperature difference between the inside and outside of the material is relatively large, which puts forward higher temperature resistance re...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C23C4/134C23C4/073C23C4/08C23C4/11C23C4/18C23C4/10H05B3/02H05B3/03H05B3/14
CPCC23C4/134C23C4/073C23C4/08C23C4/11C23C4/18C23C4/10H05B3/141H05B3/03H05B3/02
Inventor 杨焜李喜洋周炎哲陈龙飞宋进兵邓春明邓畅光刘敏周克崧
Owner GUANGDONG INST OF NEW MATERIALS
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com