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Production method of MgB2 block material doped with organic matter

An organic and organic technology, applied in the field of MgB2 superconducting material preparation, can solve the problems of increasing manufacturing costs, not being able to adapt to industrial production, and the high price of nano-sized particles, so as to increase the critical current density and reduce production costs.

Active Publication Date: 2008-10-29
深创超导(深圳)科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, nano-scale particles are expensive, which will greatly increase the manufacturing cost in the large-scale production of factories, and cannot meet the requirements of industrial production.

Method used

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  • Production method of MgB2 block material doped with organic matter
  • Production method of MgB2 block material doped with organic matter
  • Production method of MgB2 block material doped with organic matter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1) Weigh 2.764359g of Mg powder, 2.235641g of B powder and 0.5g of zinc polyacrylate powder respectively, add boron powder and zinc polyacrylate powder into deionized water, stir for 1h, then use an oven to completely evaporate the solvent, and mix with magnesium powder Fully mixed under Ar protective atmosphere;

[0024] 2) Put the uniformly mixed powder into a mould, press and form it with a press to obtain a block, the pressure is 14Mpa, and keep for 5min;

[0025] 3) Annealing and sintering the obtained bulk material under Ar protective atmosphere to obtain zinc polyacrylate doped MgB 2 Block material, the sintering process is as follows: from room temperature to 800 °C at a heating rate of 6 °C / min, after holding for 1 hour, cooling with the furnace to obtain polyacrylic acid zinc-doped MgB 2 blocks.

[0026] MgB 2 The XRD pattern of the sample is as figure 1 As shown, it can be seen that MgB is mainly generated in the reaction 2 Mutually. MgB 2 The fracture...

Embodiment 2

[0028] 1) Weigh 2.646047g of Mg powder, 2.353953g of B powder and 1g of zinc magnesium polyacrylate, add boron powder and magnesium polyacrylate powder into deionized water, stir for 1h, then use an oven to completely evaporate the solvent, and mix with magnesium powder in Fully mixed under Ar protective atmosphere;

[0029] 2) Put the uniformly mixed powder into a mould, press and form it with a press to obtain a block, the pressure is 14Mpa, and keep for 5min;

[0030] 3) Annealing and sintering the obtained bulk material under Ar protective atmosphere to obtain magnesium polyacrylate doped MgB 2 Block material, the sintering process is as follows: from room temperature to 900 °C at a heating rate of 6 °C / min, after holding for 1 hour, cooling with the furnace to obtain MgB doped with magnesium polyacrylate 2 blocks.

[0031] MgB 2 The XRD pattern of the sample is as Figure 5 As shown, it can be seen that MgB is mainly generated in the reaction 2 Mutually. Image 6 fo...

Embodiment 3

[0033] 1) Weigh 2.764359g of Mg powder, 2.235641g of B powder and 1.5g of zinc polyacrylate powder respectively, add boron powder and zinc polyacrylate powder into deionized water, stir for 1h, then use an oven to completely evaporate the solvent, and mix with magnesium powder Fully mixed under Ar protective atmosphere;

[0034] 2) the powder mixed homogeneously is packed in the mould, presses molding with press, and pressure is 14Mpa, keeps 5mi;

[0035] 3) Annealing and sintering the obtained bulk material under Ar protective atmosphere to obtain zinc polyacrylate doped MgB 2 Block material, the sintering process is as follows: from room temperature to 600 °C at a heating rate of 6 °C / min, after holding for 1 hour, cooling with the furnace to obtain polyacrylic acid zinc-doped MgB 2 blocks.

[0036] Figure 7for MgB 2 The critical current density of the sample varies with temperature, and the critical current density of the wire is calculated by the magnetic measurement ...

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Abstract

A preparation method for an MgB2 block mixed with organics belongs to the preparation filed of MgB2 superconducting material. The existing nanometer particles are mixed with MgB2 which has a high cost and is not beneficial to industrialization manufacture. The invention obtains the MgB2 block mixed with organics by adding boron metal powder with mixed powders into de-ionized water and stirring for one hour; drying the water and then fully mixing the MgB2 block mixed with organics with magnesium powder in a glove box; wherein, the mol ratio of the magnesium power to the boron metal powder is 1 to 1.1: 2; the powers of the adulterants account for 10 to 30 percent of the weight of precursor powder; then the precursor powder is pressed into a block with a pressure of 6 to 14MPa and kept for 5 minutes; finally, the temperature of the block is raised to the temperature between 600 to 900 DEG C at a temperature-raising speed of 6 DEG C / min under floating Argon gas and the temperature is persevered for one hour, and then furnace cooling is carried out to obtain the MgB2 block mixed with organics. The block of the invention has high critical current density and lower manufacture cost and is beneficial to industrialization manufacture.

Description

technical field [0001] The present invention belongs to MgB 2 The field of preparation of superconducting materials, specifically related to an improved MgB 2 A method for high-field performance of superconductors. Background technique [0002] MgB 2 It is a simple binary compound, which was found to have superconducting properties in 2001. Since its critical transition temperature is 39K, this temperature can be reached using a refrigerator, thereby avoiding the use of expensive liquid helium; at the same time, MgB 2 There is no weak connection between grain boundaries, and it is easy to prepare high-current transmission wires; coupled with the low cost of raw material manufacturing, it has attracted widespread attention from superconducting research groups around the world. Used in the temperature range of 20-30K and under the condition of low external magnetic field, its superconducting performance has reached and surpassed that of the traditional low-temperature super...

Claims

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Application Information

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IPC IPC(8): H01B13/00H01B12/00C01B35/04C01F5/00
CPCY02E40/64Y02E40/60
Inventor 张子立索红莉马麟张腾刘敏高培阔王朝
Owner 深创超导(深圳)科技有限公司
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