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Composite neutron absorbing material and preparation method thereof

An absorbing material and composite technology, applied in the field of composite neutron absorbing materials and their preparation, can solve problems such as damage to heat dissipation capacity, and achieve the effects of improving high temperature resistance performance and mechanical strength, improving mechanical strength, and increasing absorption effect.

Pending Publication Date: 2022-05-10
镇江华核装备有限公司
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  • Abstract
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  • Application Information

AI Technical Summary

Problems solved by technology

If other high-strength structural materials are used as supports, it will greatly damage the overall heat dissipation capability

Method used

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  • Composite neutron absorbing material and preparation method thereof

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Effect test

Embodiment 1

[0030] A composite neutron absorbing material mainly includes, by weight parts: 10 parts of modified carbon nano springs, 11 parts of potassium titanate whiskers and 20 parts of sodium aluminate.

[0031] A method for preparing a composite neutron-absorbing material, the method for preparing the composite neutron-absorbing material mainly includes the following preparation steps:

[0032](1) Preparation of modified carbon nanosprings: place nano-iron oxide in the reaction chamber, and at 700°C, feed nano-iron oxide 800 times the mass of acetone, pyridine and acetylene at a flow rate of 800sscm in a mass ratio of 1:1 : 3 mixed carbon source gas, stop ventilating for 5 minutes, then pass nitrogen gas at the same flow rate for 10 minutes, and after cooling to 10°C, carbon nanosprings are prepared. Carbon nanosprings and concentrated sulfuric acid with a mass fraction of 40% are pressed Mix evenly with a mass ratio of 1:15, add potassium permanganate with a mass of 0.8 times the m...

Embodiment 2

[0036] A composite neutron absorbing material mainly includes, by weight parts: 11 parts of modified carbon nano springs, 12 parts of potassium titanate whiskers and 27 parts of sodium aluminate.

[0037] A method for preparing a composite neutron-absorbing material, the method for preparing the composite neutron-absorbing material mainly includes the following preparation steps:

[0038] (1) Preparation of modified carbon nano-springs: place nano-iron oxide in the reaction chamber, and at 750°C, flow 900 times the mass of nano-iron oxide at a flow rate of 900 sscm by acetone, pyridine and acetylene in a mass ratio of 1:1 : 3 mixed carbon source gas, stop ventilating for 8 minutes, and then pass nitrogen gas at the same flow rate for 15 minutes, and after cooling to 20 ° C, carbon nano springs are obtained. Carbon nano springs and concentrated sulfuric acid with a mass fraction of 45% are pressed Mix evenly with a mass ratio of 1:12, add potassium permanganate with a mass of 0...

Embodiment 3

[0042] A composite neutron absorbing material mainly includes, by weight, 13 parts of modified carbon nano springs, 15 parts of potassium titanate whiskers and 35 parts of sodium aluminate.

[0043] A method for preparing a composite neutron-absorbing material, the method for preparing the composite neutron-absorbing material mainly includes the following preparation steps:

[0044] (1) Preparation of modified carbon nano-springs: place nano-iron oxide in the reaction chamber, and at 800°C, flow 1,000 times the mass of nano-iron oxide at a flow rate of 1,000 sscm. : 3 mixed carbon source gas, stop ventilating for 10 minutes, then pass nitrogen gas at the same flow rate for 20 minutes, and after cooling to 30 ° C, carbon nano springs are prepared. Carbon nano springs and concentrated sulfuric acid with a mass fraction of 50% are pressed Mix evenly with a mass ratio of 1:10, add potassium permanganate with 1 times the mass of carbon nano springs, and react at 60°C with 40kHz ult...

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Abstract

The invention discloses a composite neutron absorbing material and a preparation method thereof, and relates to the technical field of neutron absorbing materials. The preparation method of the composite neutron absorbing material comprises the following steps: performing vapor deposition on acetone, pyridine and acetylene to prepare a carbon nano spring, oxidizing, reacting with hydroxymethyl trimethoxysilane to prepare a modified carbon nano spring, reacting titanium dioxide with potassium hydroxide, and depositing and growing potassium titanate whiskers on the modified carbon nano spring to prepare the composite neutron absorbing material. And performing hydrogen plasma treatment on the modified carbon nano spring on which the potassium titanate whiskers grow, mixing the treated modified carbon nano spring with sodium aluminate, introducing carbon dioxide for reaction, and calcining to obtain the composite neutron absorbing material. The composite neutron absorbing material prepared by the invention has excellent high temperature resistance and mechanical properties.

Description

technical field [0001] The invention relates to the technical field of neutron absorbing materials, in particular to a composite neutron absorbing material and a preparation method thereof. Background technique [0002] With the increasing shortage of resources and the gradual aggravation of environmental pollution, the development of clean energy has become a global development trend. Due to its advantages of environmental protection, cleanliness, and high efficiency, nuclear energy has been focused on and developed rapidly. During the operation of the nuclear power plant reactor, it is necessary to continuously unload the nuclear fuel whose burnup depth reaches the design limit, which is called "spent fuel". Reports indicate that each mega-kilowatt-class reactor produces about 181 tons of spent fuel per year. It is estimated that by 2030, my country's nuclear power plants will accumulatively discharge about 24,000 tons of spent fuel. Solving and improving the high-densi...

Claims

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Application Information

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IPC IPC(8): G21C19/40
CPCG21C19/40Y02E30/30
Inventor 克磊包行飞陈涛
Owner 镇江华核装备有限公司
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