Preparation method of superconducting tape insulating coating

A technology of insulating coating and superconducting tape, which is applied to coatings, devices for coating liquid on the surface, special surfaces, etc., can solve the problems of main insulation breakdown, dissipation, boiling, etc., and achieve stable insulation strength and process Simple and easy to implement, the effect of accelerating quench recovery

Active Publication Date: 2019-11-15
SUZHOU NEW MATERIAL INST +1
View PDF5 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under transient transient conditions, the large resistance exhibited by the superconductor transitioning to the normal state will lead to the rapid accumulation of heat on the surface of the superconducting strip, and in severe cases, it will cause the superconducting strip to burn and delaminate. The heat generated is difficult to be absorbed by the liquid. The main reasons for the rapid absorption of nitrogen refrigerant are as follows: 1) The rapid temperature rise on the surface of the superconducting strip will cause the surface liquid nitrogen to boil, and then form a bubble boiling area with low thermal conductivity on

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
  • Preparation method of superconducting tape insulating coating
  • Preparation method of superconducting tape insulating coating

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for preparing an insulating coating of a superconducting tape, wherein the insulating coating is boron nitride aerogel; the specific preparation method comprises:

[0030] (1) Preparation of boron nitride hydrosol

[0031] Weigh 2g of hexagonal boron nitride (h-BN) with a size of 200µm and add it to a mixed solution of water and isopropanol (100ml / 100ml), and ultrasonically disperse at room temperature for 24 hours to finally obtain 10mg / ml of boron nitride-water- Dispersion A in isopropanol. Meanwhile, 1 g of polyvinylpyrrolidone was dissolved in 200 ml of water to make an aqueous solution B. After mixing the boron nitride-water-isopropanol dispersion A and aqueous solution B, add 0.05g sodium dodecylbenzenesulfonate and stir for 30min at a speed of 10000rad / min to prepare a foamy boron nitride hydrosol ;

[0032] (2) Preparation of boron nitride hydrogel coating on the surface of superconducting strips

[0033] Apply the prepared boron nitride hydrosol on...

Embodiment 2

[0037] A method for preparing an insulating coating of a superconducting tape, wherein the insulating coating is boron nitride aerogel; the specific preparation method comprises:

[0038] (1) Preparation of boron nitride hydrosol

[0039] Weigh 1g of hexagonal boron nitride (h-BN) with a size of 50nm and 1g of hexagonal boron nitride (h-BN) with a size of 500µm, add it to a mixed solution of water and isopropanol (100ml / 100ml), and ultrasonically disperse at room temperature After 12 hours, a 10 mg / ml boron nitride-water-isopropanol dispersion A was finally obtained. Meanwhile, an aqueous solution B was prepared by dissolving 2 g of polyvinylpyrrolidone into 200 ml of water. After mixing the boron nitride-water-isopropanol dispersion A and aqueous solution B, add 0.2 g of sodium dodecylbenzenesulfonate and stir for 30 min at a speed of 15000 rad / min to prepare a foamy boron nitride hydrosol ;

[0040] (2) Preparation of boron nitride hydrogel coating on the surface of super...

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

No PUM Login to view more

Abstract

The invention discloses a preparation method of a superconducting tape insulating coating. The insulating coating is boron nitride aerogel. The specific preparation method comprises the following steps: (1) preparation of boron nitride hydrosol; (2) preparation of a boron nitride hydrosol coating which coats the surface of a superconducting tape; and (3) preparation of a boron nitride aerogel coating on the surface of the superconducting tape. According to the scheme, the boron nitride aerogel with high heat conductivity and insulating characteristic is taken as a surface insulating coating, micropores in a porous structure of the aerogel are taken as bubble nucleation centers to inhibit formation of continuous large bubbles on the surface of the superconducting tape, and good heat transfer efficiency and stable insulating strength on the surface of the tape are maintained; the porous network structure of the boron nitride aerogel has high heat conductivity and insulating characteristic, rapid heat exchange between the superconducting tape and a liquid nitrogen medium can be realized, and quench recovery of the tape is accelerated; and a uniform insulating coating with the controllable thickness can be rapidly formed on the surface of the high-temperature superconducting tape through a repeated immersion-frictioning-freeze-drying process, and a technology is simple and easy toimplement.

Description

technical field [0001] The invention relates to a preparation method of a superconducting tape insulating coating, in particular to a preparation method of a superconducting tape porous high thermal conductivity insulating coating and its application in accelerating superconducting tape quench recovery. Background technique [0002] Superconducting cables, transformers, current limiters and other superconducting devices involved in the application of superconducting power technology are all faced with the problem of local overheating of strips caused by short-circuit fault currents, which in turn leads to rapid quenching of equipment. Although the core components of high-temperature superconducting power devices are mostly soaked in cheap liquid nitrogen to achieve the low temperature environment necessary for operation, liquid nitrogen can also be used as a low-temperature and high-voltage insulating medium. However, under transient transient conditions, the large resistanc...

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
IPC IPC(8): C09D1/00C09D5/25C09D7/65C09D7/63
CPCC09D1/00C09D5/00C09D7/65C09D7/63B05D5/00B05D7/24B05D7/50B05D2451/00
Inventor 袁文莫思铭蔡渊
Owner SUZHOU NEW MATERIAL INST
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap