CN105540553A - Novel superconducting material - Google Patents
Novel superconducting material Download PDFInfo
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- CN105540553A CN105540553A CN201510949694.8A CN201510949694A CN105540553A CN 105540553 A CN105540553 A CN 105540553A CN 201510949694 A CN201510949694 A CN 201510949694A CN 105540553 A CN105540553 A CN 105540553A
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- iron
- selenium
- arsenic
- potassium
- rare earth
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B19/00—Selenium; Tellurium; Compounds thereof
- C01B19/002—Compounds containing, besides selenium or tellurium, more than one other element, with -O- and -OH not being considered as anions
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Abstract
The present invention discloses a novel superconducting material, which is prepared from the following main components: iron, arsenic, selenium, potassium and rare earth elements in the molar ratio of 1:0.8-1.2:0.1-0.4:0.1-0.4:0.01-0.05. The preparation method of the novel superconducting material can improve the phase purity and crystal connection performance of the iron-based superconductors.
Description
Technical field
The present invention relates to field of material preparation, particularly relate to a kind of new superconduction material.
Background technology
Superconduction is one of phenomenon the most marvellous in physical world.General superconducting alloy enters superconducting state reducing to zero close to resistance during zero absolute temperature, and high-temperature superconductor then refers to that material is at certain relatively high critical temperature resistor bust to zero, and it has diverse Physical Mechanism and more wide application prospect.1986, physicist found copper oxide high temperature superconductor, and this works in next year and just obtains Nobel Prize in physics.Since then, scientists just never stopped the exploration of new high temperature superconducting materia, and constantly pursuing more while high-critical temperature, physicists are making great efforts announcement mechanism wherein always.At present, Dou You research institution of nearly all developed country is engaged in the research of high-temperature superconductor aspect in the world.On the one hand, the exploration of high-temperature superconductor mechanism is attract to the concern of numerous physicist; On the other hand, due to the energy and other specific demands, industry member is placed high hopes to superconductor technology, but because the critical temperature of general superconducting alloy is close to zero absolute temperature, the reason of refrigeration causes applying facing lots of obstruction, and high-temperature superconductor is then one of following outlet of expecting of everybody.
Compared with traditional superconducting material, iron-based superconductor has higher transition temperature, larger upper critical field, critical current to advantages such as the less dependencys of high-intensity magnetic field.Compare with high temperature YBCO coating superconducting material and Bi system superconducting line strips with traditional cryogenic superconductor Nb3Sn, the use temperature that iron-based superconductor tool is higher; Under this temperature range and upfield condition, its superconductivity has has met or exceeded the Conventional cryogenic superconducting material now used.Compared with oxide high-temperature superconducting material, the crystalline structure of iron-based superconductor is simpler, coherence length is large, anisotropy is little, preparation technology is simple, is therefore subject to international extensive concern.
But existing iron-based superconducting material also exists, and critical current density is low, crystal grain connectivity difference and the problem such as phase purity is low, therefore greatly limit its practicalization.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of new superconduction material, can improve phase purity and the crystal switching performance of iron-based superconductor.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of new superconduction material, be made up of following main ingredient: iron, arsenic, selenium, potassium and rare earth element, described iron, arsenic, selenium, potassium and rare earth element are iron according to molar ratio range: arsenic: selenium: potassium: rare earth element=1:0.8 ~ 1.2:0.1 ~ 0.4:0.1 ~ 0.4:0.01 ~ 0.05.
In a preferred embodiment of the present invention, described iron is the iron powder that purity is greater than 99.9%, and described arsenic is the arsenic powder that purity is greater than 99.9%, and described selenium is the selenium powder that purity is greater than 99.9%.
In a preferred embodiment of the present invention, iron: arsenic: selenium: potassium: rare earth element=1:1.2:0.2:0.2:0.03, described ratio is mol ratio.
The invention has the beneficial effects as follows: new superconduction material of the present invention, phase purity and the crystal switching performance of iron-based superconductor can be improved.
Embodiment
Below preferred embodiment of the present invention is described in detail, can be easier to make advantages and features of the invention be readily appreciated by one skilled in the art, thus more explicit defining is made to protection scope of the present invention.
A kind of new superconduction material of the present invention, be made up of following main ingredient: iron, arsenic, selenium, potassium and rare earth element, described iron, arsenic, selenium, potassium and rare earth element are iron according to molar ratio range: arsenic: selenium: potassium: rare earth element=1:0.8 ~ 1.2:0.1 ~ 0.4:0.1 ~ 0.4:0.01 ~ 0.05.
Embodiment one
By iron powder, arsenic powder, selenium, potassium and rare earth element respectively in proportion 1:1:0.3:0.1:0.05 weigh and mix, put into wear-resistant ball grinding jar, then ball grinder is put into high temperature energy spheroidal graphite machine, under the protection of high purity argon protective atmosphere, at temperature 80 DEG C, carry out ball milling 1 hour; Then, under the atmosphere of argon gas, the mixed powder after ball milling is poured in mould and is pressed into bulk; Finally be encapsulated in silica tube by block and vacuumize, under argon atmosphere, pressure is sinter under 0.02MPa, with the temperature rise rate of 8 DEG C/min, after rising to 800 DEG C, sinters 10 hours.
Embodiment two
Purity is greater than 99.9% iron powder, purity is greater than 99.9% arsenic powder, purity be greater than 99.9% selenium powder, potassium and rare earth element respectively in proportion 1:1.2:0.2:0.2:0.03 weigh and mix, put into wear-resistant ball grinding jar, then ball grinder is put into high temperature energy spheroidal graphite machine, under the protection of high purity argon protective atmosphere, at temperature 80 DEG C, carry out ball milling 1 hour; Then, under the atmosphere of argon gas, the mixed powder after ball milling is poured in mould and is pressed into bulk; Finally be encapsulated in silica tube by block and vacuumize, under argon atmosphere, pressure is sinter under 0.03MPa, with the temperature rise rate of 8 DEG C/min, after rising to 900 DEG C, sinters 10 hours.
Embodiment three
By iron powder, arsenic powder, selenium, potassium and rare earth element respectively in proportion 1:0.8:0.1:0.3:0.02 weigh and mix, put into wear-resistant ball grinding jar, then ball grinder is put into high temperature energy spheroidal graphite machine, under the protection of high purity argon protective atmosphere, at temperature 80 DEG C, carry out ball milling 1 hour; Then, under the atmosphere of argon gas, the mixed powder after ball milling is poured in mould and is pressed into bulk; Finally be encapsulated in silica tube by block and vacuumize, under argon atmosphere, pressure is sinter under 0.03MPa, with the temperature rise rate of 8 DEG C/min, after rising to 750 DEG C, sinters 12 hours.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present invention.
Claims (3)
1. a new superconduction material, it is characterized in that, be made up of following main ingredient: iron, arsenic, selenium, potassium and rare earth element, described iron, arsenic, selenium, potassium and rare earth element are iron according to molar ratio range: arsenic: selenium: potassium: rare earth element=1:0.8 ~ 1.2:0.1 ~ 0.4:0.1 ~ 0.4:0.01 ~ 0.05.
2. new superconduction material according to claim 1, is characterized in that, described iron is the iron powder that purity is greater than 99.9%, and described arsenic is the arsenic powder that purity is greater than 99.9%, and described selenium is the selenium powder that purity is greater than 99.9%.
3. new superconduction material according to claim 1, is characterized in that, iron: arsenic: selenium: potassium: rare earth element=1:1.2:0.2:0.2:0.03, and described ratio is mol ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510949694.8A CN105540553A (en) | 2015-12-18 | 2015-12-18 | Novel superconducting material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510949694.8A CN105540553A (en) | 2015-12-18 | 2015-12-18 | Novel superconducting material |
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| CN105540553A true CN105540553A (en) | 2016-05-04 |
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| CN201510949694.8A Pending CN105540553A (en) | 2015-12-18 | 2015-12-18 | Novel superconducting material |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111279002A (en) * | 2017-10-30 | 2020-06-12 | 三菱综合材料株式会社 | Superconducting stabilizing material, superconducting wire, and superconducting coil |
Citations (3)
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| WO2012135683A1 (en) * | 2011-03-30 | 2012-10-04 | Ambature Llc | Electrical, mechanical, computing, and/or other devices formed of extremely low resistance materials |
| CN103771862A (en) * | 2012-10-24 | 2014-05-07 | 中国科学院上海硅酸盐研究所 | Method for preparing 122 system superconducting material through ion replacement method |
| CN103771844A (en) * | 2012-10-24 | 2014-05-07 | 中国科学院上海硅酸盐研究所 | Doping method of iron-based superconducting material |
-
2015
- 2015-12-18 CN CN201510949694.8A patent/CN105540553A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012135683A1 (en) * | 2011-03-30 | 2012-10-04 | Ambature Llc | Electrical, mechanical, computing, and/or other devices formed of extremely low resistance materials |
| CN103771862A (en) * | 2012-10-24 | 2014-05-07 | 中国科学院上海硅酸盐研究所 | Method for preparing 122 system superconducting material through ion replacement method |
| CN103771844A (en) * | 2012-10-24 | 2014-05-07 | 中国科学院上海硅酸盐研究所 | Doping method of iron-based superconducting material |
Non-Patent Citations (1)
| Title |
|---|
| 冯国林: "Tl0.4K0.4Fe2-ySe2超导体Se位掺杂效应研究", 《中国博士学位论文全文数据库基础学科辑》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111279002A (en) * | 2017-10-30 | 2020-06-12 | 三菱综合材料株式会社 | Superconducting stabilizing material, superconducting wire, and superconducting coil |
| CN111279002B (en) * | 2017-10-30 | 2022-12-02 | 三菱综合材料株式会社 | Superconducting stabilizing material, superconducting wire, and superconducting coil |
| US11613794B2 (en) | 2017-10-30 | 2023-03-28 | Mitsubishi Materials Corporation | Superconductivity stabilizing material, superconducting wire and superconducting coil |
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Application publication date: 20160504 |