Ph@PVA superconducting nano coaxial cable and its preparing method

A coaxial cable and nano-technology, applied in the field of Pb@PVA superconducting nano-coaxial cable and its preparation, can solve the problems of inability to use superconducting nano-electronic devices, unsuitable superconducting nano-coaxial cables, structural characteristics, and chemical properties Differences and other issues

Inactive Publication Date: 2007-11-14
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these obtained nano-coaxial cables are all semiconductors and do not have superconducting properties, so they cannot be used in superconducting nano-electronic devices; and the currently known methods of synthesizing coaxial nano-cables require precursors to react in the gas phase , or must provide ultraviolet and radioactive radiation, complex operation, high energy consumption, not suitable for industrialization; especially due to the differences in structural characteristics and chemical properties of semiconductor materials and superconducting materials, these methods are not suitable for superconducting Synthesis of Nanocoaxial Cables

Method used

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  • Ph@PVA superconducting nano coaxial cable and its preparing method
  • Ph@PVA superconducting nano coaxial cable and its preparing method
  • Ph@PVA superconducting nano coaxial cable and its preparing method

Examples

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Effect test

Embodiment 1

[0031] Example 1: Pb@PVA superconducting nano-coaxial cable was prepared under the conditions of 185° C. and reactant mass ratio of 5:5:1.

[0032] Configure the reactants according to the mass ratio of 5:5:1: weigh 0.21g of Pb(CH 3 COO) 2 ·3H 2 O, 0.21g PVP, what used here is the PVP that molecular weight is 40000; Weigh 0.042g PVA, what used here is the PVA that molecular weight is 1750; Dissolve in 14ml ethylene glycol, make solution and pour it into autoclave and seal the autoclave, usually with an anti-corrosion lining, what is used here is an autoclave with a volume of 20ml and lined with polytetrafluoroethylene; the autoclave is placed in a crucible resistance furnace, Raise the temperature at a slow heating rate. Normally, the heating rate should be controlled at 1-2.5°C / min. In this example, 1°C / min is used; after the temperature rises to 180°C, it is kept for 12 hours; after it is naturally cooled to room temperature The product solution was taken out, the product...

Embodiment 2

[0042] Example 2: Pb@PVA superconducting nano-coaxial cable was prepared under the conditions of 190° C. and reactant mass ratio of 4.5:5.5:1.

[0043] Weigh 0.21g of Pb(CH 3 COO) 2 ·3H 2 O, 0.26g of PVP with a molecular weight of 40,000; weigh 0.046g of PVA with a molecular weight of 1750; dissolve it in 12ml of ethylene glycol, and pour it into a 20ml autoclave with a Teflon liner After sealing, place the autoclave in a crucible resistance furnace, raise the temperature to 190°C at a rate of 2°C / min, and then keep it warm for 24 hours; after it is naturally cooled to room temperature, take out the product solution, centrifuge to separate the product, and use Sample 6 was obtained after washing with water and ethanol three times and vacuum drying.

[0044] The samples were characterized by JElectronics JSM-6700F field emission scanning electron microscope, Hitachi H-800 transmission electron microscope, and Philips X’Pert X-ray diffractometer in the Netherlands.

[0045] ...

Embodiment 3

[0048] Example 3: Preparation of Pb@PVA superconducting nano-coaxial cables at 200° C. and reactant mass ratio of 5.5:4.5:1.

[0049] Configure the reactants according to the mass ratio of 5.5:4.5:1: weigh 0.21g Pb(CH 3 COO) 2 ·3H 2 O, 0.17g molecular weight is the PVP of 40000; 0.038 g molecular weight is the PVA of 1750; It is dissolved in 14ml ethylene glycol, and it is poured into after making solution and volume is that 20ml has the autoclave of polytetrafluoroethylene liner, After sealing, place the autoclave in a crucible resistance furnace, heat it up to 200°C at a rate of 2°C / min, and keep it warm for 12 hours; after it is naturally cooled to room temperature, take out the product solution, centrifuge to separate the product, and wash it with absolute ethanol Sample 7 was obtained after washing three times and vacuum drying.

[0050] The samples were characterized by JElectronics JSM-6700F field emission scanning electron microscope, Hitachi H-800 transmission elec...

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Abstract

This invention is Pb @ PVA superconducting nano-coaxial cable and preparation methods, its character is three hydration will lead acetate, polyvinyl alcohol and polyvinylpyrrolidone on quality than 5 +- 0.5:5 +- 0.5:1 soluble B diol which reside Pb (CH3COO) 2 . 3 H2O concentration of 0.015-0.018 g / ml, load the reactor to 60-80% in volume, after the slow warming confined to 185-200 Deg.C, holding 12 to 24 hours, Cleaning products using ethanol and centrifugal separation, which were endorsed by the length of 1-10 mu m, a diameter of 80-200 nm cubic crystal Pb nanowires for batteries, thick 10-50 nm PVA polymer layer for the parcels Pb @ PVA superconducting nano-coaxial cable; has good oxidation resistance and superconductivity. The invention method is simple, homogeneous product, the mild reaction conditions, easily extended to all kinds of different material systems.

Description

Technical field: [0001] The invention belongs to the technical field of low-dimensional organic and metal composite materials and their preparation, and in particular relates to a Pb@PVA superconducting nano coaxial cable and a preparation method thereof. Background technique: [0002] The quantum size effect of superconducting nanowires helps people better understand the superconducting mechanism, and has broad application prospects in the fields of quantum computing, magnetic measurement and nanoelectronic devices, thus becoming a hot spot in the fields of physics and materials science . U.S. "Physical Review Letters" (Physical Review Letters, 2004, volume 93, page 87002) reported that in a series of overdoped YBa 2 Cu 3 o 7-δ The resistance-temperature curves of the nanowires at the pseudogap opening temperature (T * ) and superconducting transition temperature (T c ) random oscillation behavior in the temperature range, indicating that there are domain walls caused ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B13/016H01B12/00
CPCY02E40/64Y02E40/60
Inventor 陆小力章根强汪伟李晓光
Owner UNIV OF SCI & TECH OF CHINA
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