CN108179465A - The preparation method of high-temperature superconductor - Google Patents
The preparation method of high-temperature superconductor Download PDFInfo
- Publication number
- CN108179465A CN108179465A CN201611119194.2A CN201611119194A CN108179465A CN 108179465 A CN108179465 A CN 108179465A CN 201611119194 A CN201611119194 A CN 201611119194A CN 108179465 A CN108179465 A CN 108179465A
- Authority
- CN
- China
- Prior art keywords
- temperature
- baco3
- powder
- cuo
- solution
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B19/00—Liquid-phase epitaxial-layer growth
- C30B19/12—Liquid-phase epitaxial-layer growth characterised by the substrate
-
- C—CHEMISTRY; METALLURGY
- C30—CRYSTAL GROWTH
- C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
- C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
- C30B29/10—Inorganic compounds or compositions
- C30B29/16—Oxides
- C30B29/22—Complex oxides
- C30B29/225—Complex oxides based on rare earth copper oxides, e.g. high T-superconductors
Abstract
The invention discloses a kind of preparation methods of high temperature superconducting film, include the following steps：A) Ba Cu O powder is prepared；B) Ba Cu O pioneers powder is added in the Y2O3 crucibles in crystal growing furnace, is heated to the first temperature and is kept the temperature, obtain Y Ba Cu O solution；C) Ba Cu O pioneer's powder is added in solution, and kept the temperature；D) solution is reduced to second temperature with the first cooling rate；E) solution that step d) obtains is inserted into using the NGO monocrystal substrates for being fixed on connecting rod as seed crystal material, grows the YBCO liquid phase epitaxy films of pure a axis orientation.The present invention, as seed crystal, the amount of Ba Cu O powder and the time of heat preservation is added in by control to realize that epitaxial growth a axis is orientated YBCO superconducting thick-films for the second time using NGO monocrystal substrates.
Description
Technical field
The present invention relates to a kind of preparation methods of high temperature superconducting materia.
Background technology
High temperature superconducting materia has excellent superconductivity in liquid nitrogen temperature, therefore in superconducting energy storage, superconducting motor, nuclear-magnetism
The fields such as resonance, device research and development possess extremely important application value.The base application research of high quality film has attracted large quantities of materials
The extensive concern of material neo-confucian.
The structures shape of the material performance of material, and then affect the application of material in practice.In general, by
In YBCO Superconducting Crystals lattice constant in both direction a axis and b axis approximately equals, i.e. YBCO crystal structures are being similar to one just
Quadrangular.Thus, YBCO superconducting thick-films typically exhibit two kinds of orientations, i.e. a axis orientation and c-axis orientation.The YBCO high of c-axis orientation
Temperature superconductive thick film has higher critical current density, thus has important application in terms of electric power transport, and a axis orientation
REBCO high temperature superconductive thick films have vital application in terms of Josephson's junction device.
Liquid phase epitaxy（Liquid Phase Epitaxy, LPE）It is generally considered a kind of YBCO superconductions of great potential
The preparation method of thick film.During rheotaxial growth YBCO superconducting thick-films, seed crystal is fixed in connecting rod and slowly leans on
Near saturated solution surface, the growth as unique nucleation point induction YBCO superconducting thick-films.Since the growth conditions of LPE is close flat
Weigh state, and the thick film obtained using the smaller material of lattice mismatch as seed crystal induced growth has low defect, high crystalline energy
The features such as.In addition, since LPE is carried out under non-vacuum condition, thus this method has the advantages that manufacturing cost is low etc..And with
General film technique is compared, and LPE has the faster speed of growth.
Therefore, those skilled in the art, which is dedicated to seeking, a kind of effectively expands pure a axis liquid phase epitaxy film growth window
Method so that it is simple to operation of low cost, for preparing the pure a axis orientation of high-quality needed for the research and development of Josephson's junction device
YBCO high temperature superconducting films.
Invention content
In view of the drawbacks described above of the prior art, the technical problems to be solved by the invention are to provide a kind of use gallic acid neodymium
（NdGaO3, NGO）Monocrystal substrate is orientated as seed crystal using top seeded solvent growth rheotaxial growth a axis in air
The method of YBCO superconducting thick-films, this method can effectively expand pure a axis liquid phase epitaxy film growth window, so as to be conducive to pure a axis
The preparation of YBCO superconducting thick-films is orientated, it is simple to operation of low cost.
To achieve the above object, the present invention provides a kind of method for preparing a axis orientation high temperature superconducting film in air, packets
Include following steps：
A) BaCO3 powder and CuO powder are subjected to dispensing, obtain BaCO3+CuO powders, the Ba in the BaCO3+CuO powders
Molar ratio with Cu is 0.4-0.7；
B) the BaCO3+CuO powders obtained by step a) are pre-processed；
C) Ba-Cu-O powder is made in the pretreated BaCO3+CuO powders of sintering step b)；
D) the Ba-Cu-O powder obtained by step c) is added in the crucible of Y2O3 materials and is heated to the first temperature, and after continuation of insurance
Temperature obtains Y-Ba-Cu-O solution；
E) after obtaining the Y-Ba-Cu-O solution obtained by step d), 20-30 grams of step c) is added in into the Y-Ba-Cu-O solution
The Ba-Cu-O powder of gained, and continue to keep the temperature in the first temperature；
F) the Y-Ba-Cu-O solution obtained by step e) is cooled to second temperature；
G) it is using the indices of crystallographic plane（110）NGO monocrystal substrates as seed crystal, the NGO monocrystal substrates are inserted perpendicularly into step
F) the Y-Ba-Cu-O solution obtained by, using top seeded solvent growth rheotaxial growth YBCO superconducting thick-films.
Further, the pretreatment of step b) includes following process：
（i）Wet-milling is carried out to BaCO3+CuO powders to obtain BaCO3+CuO slurries, the wet-milling time is 2-4 hours；
（ii）Baking operation（i）The BaCO3+CuO slurries of gained.
Technique effect：
For the present invention using NGO monocrystal substrates as seed crystal, the YBCO superconducting thick-films of the pure a axis orientation of rheotaxial growth pass through control
System adds in the amount of Ba-Cu-O powder and the time of heat preservation to realize that epitaxial growth a axis is orientated YBCO superconducting thick-films for the second time
Property.
Achievement in research before inventor's combination, the method that the prior art uses can be attributed to from saturation state to satiety
With state and then epitaxial growth high temperature superconducting film.And method provided by the invention, it substantially may be considered through control second
The secondary amount for adding in Ba-Cu-O powder and soaking time adjust solution from undersaturated condition to high and state, then utilize seed
Brilliant induced growth superconduction epitaxial film.One aspect of the present invention avoids the back dissolving effect of Nd elements in hot conditions lower substrate as a result,；
On the other hand, solution will certainly undergo a saturation state between undersaturation to hypersaturated state, be equivalent to saturation state
Temperature is lower than previous method, it is meant that degree of supersaturation is lower than previous method.
In addition, the present invention not only eliminates implacable contradiction between back dissolving effect and small degree of supercooling so that growth
The a axilemmas gone out are free of other phases, and the growth window for effectively expanding a axilemmas can be prepared highly reliably to 30K
The YBCO films of pure a axis orientation.Meanwhile method provided by the invention allows entire growth in air environment, therefore greatly simplifies
Preparation process and reduce manufacturing cost.
Claims (2)
- A kind of 1. method for preparing a axis orientation high temperature superconducting film in air, it is characterised in that:Include the following steps：A) will BaCO3 powder and CuO powder carry out dispensing, obtain BaCO3+CuO powders, and the Ba's and Cu in the BaCO3+CuO powders rubs You are than being 0.4-0.7；B) the BaCO3+CuO powders obtained by step a) are pre-processed；C) Ba-Cu-O powder is made in the pretreated BaCO3+CuO powders of sintering step b)；D) the Ba-Cu-O powder obtained by step c) is added in the crucible of Y2O3 materials and is heated to the first temperature, and after continuation of insurance Temperature obtains Y-Ba-Cu-O solution；E) after obtaining the Y-Ba-Cu-O solution obtained by step d), 20-30 grams of step c) is added in into the Y-Ba-Cu-O solution The Ba-Cu-O powder of gained, and continue to keep the temperature in the first temperature；F) the Y-Ba-Cu-O solution obtained by step e) is cooled to second temperature；G) it is using the indices of crystallographic plane（110）NGO monocrystal substrates as seed crystal, the NGO monocrystal substrates are inserted perpendicularly into step F) the Y-Ba-Cu-O solution obtained by, using top seeded solvent growth rheotaxial growth YBCO superconducting thick-films.
- 2. the method as described in claim 1, it is characterised in that:Pretreatment described in step b) includes following process：（i）It is right The BaCO3+CuO powders carry out wet-milling to obtain BaCO3+CuO slurries, and the wet-milling time is 2-4 hours；（ii）Baking operation（i）The BaCO3+CuO slurries of gained.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611119194.2A CN108179465A (en) | 2016-12-08 | 2016-12-08 | The preparation method of high-temperature superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611119194.2A CN108179465A (en) | 2016-12-08 | 2016-12-08 | The preparation method of high-temperature superconductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108179465A true CN108179465A (en) | 2018-06-19 |
Family
ID=62544706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611119194.2A Pending CN108179465A (en) | 2016-12-08 | 2016-12-08 | The preparation method of high-temperature superconductor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108179465A (en) |
-
2016
- 2016-12-08 CN CN201611119194.2A patent/CN108179465A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103276447B (en) | A kind of method preparing specific blend orientation YBCO high temperature superconductive thick film | |
| CN102925976B (en) | Method using NGO monocrystal substrate to prepare a shaft REBCO high temperature superconductor thick film | |
| CN103696009B (en) | A kind of method preparing a axle orientation high temperature superconducting film in atmosphere | |
| CN101279847A (en) | Preparation for YBCO Superconducting bulk doped with trace rare-earth element | |
| CN103526283B (en) | A kind of method of the YBCO liquid phase epitaxy film preparing pure a axle orientation | |
| CN1970849A (en) | Oxygen atmosphere control preparation method for alpha-axis oriented Yt-Ba-Cu-O superconductive thick film | |
| CN108179465A (en) | The preparation method of high-temperature superconductor | |
| CN103603034A (en) | Method for preparing large-sized high-temperature superconducting monocrystals | |
| CN104120490B (en) | A kind of method for preparing a axle orientation high temperature superconducting film | |
| CN109112483B (en) | A kind of heat treatment method of high-speed growing high-performance RE, Ba and Cu oxide high temperature superconducting film | |
| CN1190526C (en) | Liquid phase epitaxial growth of superconductive thick film material with overheated seed film as seed crystal | |
| CN109023526B (en) | Method for preparing calcium-doped YBCO high-temperature superconducting monocrystal | |
| US6929695B2 (en) | Method for preparing single crystal oxide thin film | |
| CN104178808B (en) | Liquid-phase epitaxial method for preparing high-temperature superconductive artificial crystal boundary | |
| Hagiwara et al. | High-energy ultrasonic irradiation effects on the growth and critical current density of top-seeded melt grown single grain YBa2Cu3O7-δ bulk superconductors | |
| CN109082708B (en) | Method for preparing c-axis YBCO high-temperature superconducting thick film with two a-axis grains | |
| CN114078955B (en) | Heterojunction and preparation method thereof | |
| Li et al. | Multiseeded Melt Growth of Bulk YBa 2 Cu 3 O 7-δ Using in Situ Self-assembly Seeding Approach | |
| Qi et al. | Rapid Growth of Nd2− xCexCuO4 Thick Films as a Buffer for the Growth of Rare-earth Barium Cuprate–coated Conductors | |
| Guo et al. | A new cooling plus heating mode of liquid phase epitaxy and its application for oriented film growth | |
| CN108179464A (en) | A kind of method for preparing high temperature superconducting film | |
| Xie et al. | Formation of epitaxial Tl2Ba2Ca2Cu3O10 superconducting films by dc-magnetron sputtering and triple post-annealing method | |
| Kütük et al. | Microstructure Study at Different Thicknesses of Disc-Shaped YBa 2 Cu 3 O 7− x Prepared by FQMG Method | |
| Wang et al. | Development of metal-organic deposition-derived second-generation high-temperature superconductor tapes and artificial flux pinning | |
| Nomura et al. | Enlargement of REBa2Cu3Oy (RE= Y, Yb) quasi-single crystalline film by liquid phase epitaxy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180619 |
|
| WD01 | Invention patent application deemed withdrawn after publication |