Open-fire-resistant magnesium oxide-zirconia protective ultra-high-temperature wire and preparation method thereof

A technology of magnesium oxide and zirconium oxide, which is applied in the field of wires, can solve the problems of damaging the tightness of the insulating protective layer, and achieve the effects of light weight, improved temperature resistance, and simple structure

Active Publication Date: 2021-06-29
KUNMING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nowadays, the outer packaging of general wires is made of polymers (polytetrafluoroethylene, polypropylene and other polymer materials), but such products cannot be used under open flames. If there is flame ablation, they will burn immediately and directly destroy The tightness of the insulation protection layer

Method used

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  • Open-fire-resistant magnesium oxide-zirconia protective ultra-high-temperature wire and preparation method thereof
  • Open-fire-resistant magnesium oxide-zirconia protective ultra-high-temperature wire and preparation method thereof

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preparation example Construction

[0034] The invention provides an open flame resistant magnesia-zirconia protected ultra-high temperature wire, the preparation method of which comprises the following steps:

[0035] (1) Preparation of high-temperature conductors: smelting alloy steel powder, wire drawing, and annealing to obtain steel alloy wires, twisting the steel alloy wires to make conductors, then first copper-plating the conductors, and then plating nickel alloys to obtain high-temperature conductors;

[0036] (2) Take magnesium oxide, aluminum oxide, composite tantalate and zirconium oxide powder in proportion, use dehydrated alcohol as the medium, make the powder mix uniformly by ball milling, dry and sieve the mixed powder to obtain the spray material, Then use plasma spraying technology to evenly spray the spray material on the high temperature conductor obtained in step (1); wherein, the mass ratio of magnesium oxide, aluminum oxide and zirconium oxide powder is 3-5:5-7:3-4, and the composite tantal...

Embodiment 1

[0054] In this embodiment, the preparation method of the flame-resistant magnesia-zirconia protected ultra-high temperature wire is as follows:

[0055] The prepared alloy steel powder was smelted at a temperature of 1435°C, the smelted alloy was drawn into an alloy wire with a diameter of 0.78mm, the annealing temperature was 870°C, and 12 alloy monofilaments were twisted into a group to obtain a conductor. In 3.0mol / L neutral composite copper solution, the conductor is copper-plated (current 4.2A, voltage 27V, electroplating time 40min); in 8.0mol / L neutral composite nickel alloy solution, copper-plated conductor is carried out Nickel (current 9.2A, voltage 52V, electroplating time 42min), prepared as a high temperature conductor.

[0056] Take by weighing magnesia 24.362g, aluminum oxide 29.852g, zirconia powder 24.312g and composite tantalate 2.365g, take dehydrated alcohol as medium, place ball milling in planetary mill (ball milling speed 525r / min, ball milling time 760m...

Embodiment 2

[0062] In this embodiment, the preparation method of the flame-resistant magnesia-zirconia protected ultra-high temperature wire is as follows:

[0063] The prepared alloy steel powder was smelted at a temperature of 1440°C, the smelted alloy was drawn into an alloy wire with a diameter of 0.78mm, the annealing temperature was 885°C, and 10 alloy monofilaments were twisted into a group to obtain a conductor. In 4.0mol / L neutral composite copper solution, copper-plate the conductor (current 4.6A, voltage 26V, electroplating time 39min); in 9.0mol / L neutral composite nickel alloy solution, copper-plated conductor Nickel (current 8.7A, voltage 53V, electroplating time 46min) was prepared as a high-temperature conductor.

[0064] Take by weighing magnesia 23.968g, aluminum oxide 29.567g, zirconia powder 23.985g and composite tantalate 2.215g, take dehydrated alcohol as medium, place ball milling in planetary mill (ball milling speed 570r / min, ball milling time 660min ), so that i...

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Abstract

The invention belongs to the technical field of wires, and particularly discloses an open-fire-resistant magnesium oxide-zirconia protective ultra-high-temperature wire and a preparation method thereof. The preparation method comprises the following steps of twisting steel alloy wires to prepare a conductor, and conducting copper plating and nickel alloy plating in sequence to prepare a high-temperature conductor; uniformly grinding magnesia, aluminum oxide, composite tantalate and zirconia powder, drying, sieving to obtain a spraying material, and spraying the spraying material onto the high-temperature conductor; then coating a layer of polycrystalline alumina fiber mat; and adding magnesia, sodium silicate, zirconia, condensed aluminum phosphate, silicon dioxide and aluminum hydroxide into water by adopting a sol gel method, heating and stirring to uniformly mix the solution, dipping the high-temperature conductor in the solution, and curing and heating to form a composite insulated conductor protection layer, thereby obtaining a finished wire product. The wire has excellent high-temperature insulation performance, high-temperature smudging resistance, bending performance and adaptability to various high-temperature environments, is simple in structure and light in weight, can resist open fire erosion, and is suitable for high-temperature and ultra-high-temperature environments such as metallurgy and chemical engineering.

Description

technical field [0001] The invention relates to the field of wires, in particular to a flame-resistant magnesia-zirconia protected ultra-high temperature wire and a preparation method thereof. Background technique [0002] Wires are an important carrier of energy transmission today, connecting the normal production and life of thousands of families and factories. Nowadays, the outer packaging of general wires is made of polymers (polytetrafluoroethylene, polypropylene and other polymer materials), but such products cannot be used under open flames. If there is flame ablation, they will burn immediately and directly destroy The tightness of the insulation protection layer. With the rapid development of today's society, smelting equipment, annealing equipment, and corresponding testing instruments and meters in iron and steel metallurgy, coal power generation and other industries need to work under high temperature conditions, so the wires on these instruments and equipment a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/10C23C4/134C23C18/12C23C28/00C25D5/12H01B3/10H01B7/02H01B13/00
CPCC23C4/10C23C18/1204C23C18/1254C23C28/321C23C28/345C25D5/12C23C4/134H01B3/10H01B7/02H01B13/00
Inventor 冯晶利建雨汪俊李振军王峰
Owner KUNMING UNIV OF SCI & TECH
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