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High-temperature molding insulating material for superconducting magnet and preparation method thereof

An insulating material, high-temperature molding technology, applied in superconducting magnets/coils, magnetic objects, organic insulators, etc., can solve the problem that epoxy resin insulating materials cannot be applied, and achieve outstanding radiation resistance performance, simple preparation process, and molding The effect of a wide temperature range

Active Publication Date: 2019-12-17
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Obviously, conventionally used epoxy resin insulation materials cannot be applied

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Example 1 High-temperature molded insulating material for superconducting magnets and its preparation method

[0024] Mix 100g of liquid polysiloxane and 20g of silicon powder at 35°C with high-speed stirring, and vacuum degassing at the same time to prepare a mixed solution; immerse 125 grams of high-silica glass fiber fabric in the above mixed solution, After 5 hours of reaction at 200°C, the temperature was raised to 650°C for 200 hours of high-temperature molding, and the high-temperature molding atmosphere was inert gas to obtain an insulating material.

[0025] After the 4.2K test, the interlayer shear strength of the above insulating material is 82MPa, the compressive strength is 1.2GPa, and the breakdown strength is 92kV / mm.

Embodiment 2

[0026] Example 2 High-temperature molded insulating material for superconducting magnets and its preparation method

[0027] Mix 100g of liquid polysiloxane and 25g of aluminum powder at 35°C with high-speed stirring, and vacuum degassing at the same time to prepare a mixed solution; use a high-pressure spray gun to spray the above mixed solution on 110 grams of aluminosilicate glass fiber On the fabric, after reacting at 200°C for 5 hours, the temperature was raised to 650°C for 200 hours of high-temperature molding, and the high-temperature molding atmosphere was an inert gas to obtain an insulating material.

[0028] After the 4.2K test, the interlayer shear strength of the above insulating material is 78MPa, the compressive strength is 1.1GPa, and the breakdown strength is 88kV / mm.

Embodiment 3

[0029] Example 3 High-temperature molded insulating material for superconducting magnets and its preparation method

[0030] Mix 100g of liquid polysilazane and 15g of silicon nitride whiskers at 35°C with high-speed stirring, and vacuum degassing at the same time to prepare a mixed solution; impregnate 75 grams of high-silica glass fiber tape in the above mixed solution In the process, after reacting at 200°C for 5 hours, the temperature was raised to 850°C for high temperature molding for 10 hours, and the high temperature molding atmosphere was an inert gas to obtain an insulating material.

[0031] After the 4.2K test, the interlayer shear strength of the above insulating material is 73MPa, the compressive strength is 1GPa, and the breakdown strength is 91kV / mm.

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Abstract

The invention provides a superconducting magnet applying high-temperature-forming insulation material and a preparation method thereof. The insulation material is prepared from, by weight, 25%-45% of a liquid polymer, 40%-70% of glass fiber fabric and 0.5%-50% of a functional filler, the liquid polymer refers to a liquid silicon-based polymer and a modified polymer thereof, the glass fiber fabric is of high-temperature glass fiber fabric, and the functional filler is a composition of one or multiple of silicon carbide, silicon nitride, silicon oxide, aluminum oxide, aluminum powder, silicon nanoparticles or crystal whiskers. The insulation material is simple in preparation method, suitable for high temperature forming and good in process operation, and the problem that a traditional magnet applying epoxy resin insulation material cannot be formed in high temperature is solved; the prepared insulation material is remarkable in anti-radiation property, cryogenic mechanical property and insulation property.

Description

technical field [0001] The invention relates to the technical field of material engineering, in particular to a high-temperature molding insulating material for superconducting magnets and a preparation method thereof. Background technique [0002] Epoxy resin-based insulating materials have good process performance, high low-temperature strength and insulating properties, and are usually used to make insulating layers in superconducting magnets. However, epoxy resin-based insulating materials have poor heat resistance, cannot be molded at high temperatures (higher than 650°C), and have a high thermal expansion coefficient, which will generate large thermal stress during the operation of the magnet, which will affect the safe and reliable operation of the magnet. , thus limiting the use of epoxy resin-based insulating materials in some new high-field magnets. For example, Nb 3 Sn, Nb 3 Al and Bi-based high-temperature superconducting materials are brittle. When making hig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/04C08L83/16C08K3/02C08K7/14C08K3/08C08K7/10C08K3/22C08K3/28H01B3/46H01F6/00
CPCC08K3/02C08K3/08C08K3/22C08K3/28C08K7/10C08K7/14C08K2003/023C08K2003/0812C08K2003/2227C08K2003/282C08L2201/08H01B3/46H01F6/00C08L83/04C08L83/16
Inventor 吴智雄张驰黄传军黄荣进李来风
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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