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A kind of superconducting material and preparation method thereof for NMR human body imaging

A technology for superconducting materials and human imaging, applied in the usage of superconducting elements, superconducting devices, superconducting/high-conducting conductors, etc., which can solve the problems of low superconducting transition temperature, degradation of superintercepting current capability, and high cost of helium gas , to achieve high electrical conductivity, improve high temperature resistance, uniform distribution effect

Active Publication Date: 2020-03-24
THE AFFILIATED HOSPITAL OF QINGDAO UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] As the most important high-tech energy-saving and environmentally friendly materials in the 21st century, superconducting materials are widely used in large-scale power transmission and distribution, super magnets, energy storage, transformers, maglev trains and other fields. The main superconducting materials currently on the market are based on Low-temperature superconducting materials, due to the very low superconducting transition temperature, make superconducting materials must operate under the condition of liquid helium, and the high cost of helium affects the application range of superconducting materials, currently widely used Copper oxide superconducting materials cannot be used for a long time due to the degradation of super-cutting capacity. Therefore, the YBCO high-temperature superconducting materials developed now are widely used due to their high-temperature superconductivity and durability, but YBCO superconducting materials are widely used. The supercritical current density of conductive materials still cannot reach the ideal value, and the existing sol method is the most widely used in the preparation process of superconducting materials. The uniformity of mixing affects the type and structure of the calcined product, making the properties of the prepared superconducting material unstable

Method used

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  • A kind of superconducting material and preparation method thereof for NMR human body imaging
  • A kind of superconducting material and preparation method thereof for NMR human body imaging
  • A kind of superconducting material and preparation method thereof for NMR human body imaging

Examples

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Effect test

Embodiment 1

[0026] The specific preparation process of modified graphite powder is as follows: Weigh 1kg of graphite and add it to 8L ethanol solution, ultrasonically disperse it at room temperature for 10min, add the dispersed graphite solution into a three-necked flask, raise the temperature to 90°C, and add 0.85kg Sodium dodecylbenzenesulfonate, after stirring and reacting for 5min, 1.32kg of vinyltriethoxysilane was added thereto, reacted at constant temperature for 1h, then filtered, washed and dried, and the obtained product was ground to obtain modified graphite powder;

[0027] The specific preparation process of carbon / titanium doped magnesium diboride is as follows:

[0028] Add 1kg of magnesium diboride and 0.83kg of nano-titanium dioxide into 3L of acetic acid, mix evenly to obtain a sol, put the sol into a tube furnace at 300°C and roast for 2 hours, then heat up to 650°C and bake for 1 hour, then cool down to 200°C and take it out. A carbon / titanium doped magnesium diboride ...

Embodiment 2

[0030] The specific preparation process of modified graphite powder is as follows: Weigh 1kg of graphite and add it to 8L ethanol solution, ultrasonically disperse it at room temperature for 10min, add the dispersed graphite solution into a three-necked flask, raise the temperature to 90°C, and add 0.87kg Sodium dodecylbenzenesulfonate, after stirring and reacting for 5min, 1.32kg of vinyltriethoxysilane was added thereto, reacted at constant temperature for 1h, then filtered, washed and dried, and the obtained product was ground to obtain modified graphite powder;

[0031] The specific preparation process of carbon-doped magnesium diboride is as follows:

[0032] Add 1 kg of magnesium diboride into 3 L of acetic acid, mix well to obtain a sol, put the sol into a tube furnace at 300°C and roast for 2 hours, then heat up to 650°C and bake for 1 hour, then cool down to 200°C and take it out to obtain a carbon-doped bismuth Magnesium boride.

Embodiment 3

[0034] A specific preparation process of a superconducting material for nuclear magnetic resonance human imaging is as follows:

[0035] The first step, 1.11kg diyttrium trioxide and 2.39kg cupric oxide are dissolved in concentration respectively in the dilute nitric acid of 55%, configuration concentration is the yttrium nitrate solution of 1mol / L and the copper nitrate solution that concentration is 3mol / L, simultaneously Barium nitrate is added into water to be configured as a barium nitrate solution with a concentration of 2 mol / L;

[0036] In the second step, add the yttrium nitrate solution configured in the first step into the reaction vessel, raise the temperature to 60°C, then add 2.24 kg of diethylenetriamine dropwise to the yttrium nitrate solution, stir vigorously while adding, and dropwise completely After constant temperature reaction for 30min, yttrium sol was obtained;

[0037] In the third step, add the copper nitrate solution and barium nitrate solution conf...

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Abstract

The invention discloses a superconducting material for nuclear magnetic resonance human body imaging, which comprises the following raw materials in parts by weight: modified graphite powder 13.2-13.8part, yttrium trioxide 11.1-11.3 part, copper oxide 23.9-24.2 part, barium nitrate 52.1-52.3 part, diethylenetriamine 22.4-22.7 part, propionic acid 132.6-134.7 parts, carbon / titanium doped magnesiumdiboride 6.9-7.2 part, proper amount of water and proper amount of dilute nitric acid. The modified graphite powder and each colloid of the material prepared by the invention interact with each otherthrough chemical bond, so that that yttrium sol, copper sol and barium sol are distributed on the framework of modified graphite powder, subsequent to calcination, Decomposition of Organic Componentsin Yttrium Sol, Copper Sol and Barium Sol and Their Relationship with Yttrium, YBa_2Cu_3O_X superconducting crystals are formed on the modified graphite powder framework by Cu and Ba. The core-shellstructure of YBa_2Cu_3O_X superconducting crystals is formed by C / Ti doping magnesium diboride. The structure of the superconducting material is stable and the composition distribution is uniform.

Description

technical field [0001] The invention belongs to the field of preparation of superconducting materials, and relates to a superconducting material used for NMR human body imaging and a preparation method thereof. Background technique [0002] As the most important high-tech energy-saving and environmentally friendly materials in the 21st century, superconducting materials are widely used in large-scale power transmission and distribution, super magnets, energy storage, transformers, maglev trains and other fields. The main superconducting materials currently on the market are based on Low-temperature superconducting materials, due to the very low superconducting transition temperature, make superconducting materials must operate under the condition of liquid helium, and the high cost of helium affects the application range of superconducting materials, currently widely used Copper oxide superconducting materials cannot be used for a long time due to the degradation of super-cu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01B12/00H01B1/06H01B13/00
CPCH01B1/06H01B12/00H01B13/00Y02E40/60
Inventor 刘光震颜廷斐唐家明苏粤娟曾惠珍
Owner THE AFFILIATED HOSPITAL OF QINGDAO UNIV
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