JPH01308879A - Sintering apparatus for oxide superconductor - Google Patents
Sintering apparatus for oxide superconductorInfo
- Publication number
- JPH01308879A JPH01308879A JP63137290A JP13729088A JPH01308879A JP H01308879 A JPH01308879 A JP H01308879A JP 63137290 A JP63137290 A JP 63137290A JP 13729088 A JP13729088 A JP 13729088A JP H01308879 A JPH01308879 A JP H01308879A
- Authority
- JP
- Japan
- Prior art keywords
- sintered
- supply means
- fired
- oxygen
- superconductor
- 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
- 239000002887 superconductor Substances 0.000 title claims abstract description 22
- 238000005245 sintering Methods 0.000 title abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 34
- 239000001301 oxygen Substances 0.000 claims abstract description 34
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 34
- 238000010304 firing Methods 0.000 claims description 17
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 15
- 239000000463 material Substances 0.000 abstract description 11
- AYJRCSIUFZENHW-UHFFFAOYSA-L barium carbonate Chemical compound [Ba+2].[O-]C([O-])=O AYJRCSIUFZENHW-UHFFFAOYSA-L 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 239000000843 powder Substances 0.000 abstract description 4
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 abstract 2
- 238000001179 sorption measurement Methods 0.000 abstract 1
- 239000011120 plywood Substances 0.000 description 8
- 239000000919 ceramic Substances 0.000 description 7
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 6
- 229910001882 dioxygen Inorganic materials 0.000 description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 229910021521 yttrium barium copper oxide Inorganic materials 0.000 description 2
- 238000001354 calcination Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010298 pulverizing process Methods 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、酸化物超電導体の製造装置忙関するものであ
る励
〔従来の技術〕
１９８７年になって、従来よりも非常に高い臨・昇温度
を持つ酸化物超電導体が発見され、液体窒素温度（７７
Ｋ）でも超電導性を示すようになった。この超電導体は
、たとえば、Ｙ−Ｂ−Ｃｕ−０で代表される組成の酸化
物であり、その製造法は、たとえば所定量のＹ２Ｏ３、
ＢａＣＯ５及びＣｕＯの粉体を均一に混合し、仮焼し粉
砕して仮焼粉を作成し、乾式プレス法等で所定の形状に
成形し、しかる後焼成することにより製作している。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an oxide superconductor manufacturing apparatus. Oxide superconductors with elevated temperatures have been discovered, and liquid nitrogen temperatures (77
K) also began to exhibit superconductivity. This superconductor is, for example, an oxide with a composition represented by Y-B-Cu-0, and its manufacturing method includes, for example, a predetermined amount of Y2O3,
It is manufactured by uniformly mixing powders of BaCO5 and CuO, calcining and pulverizing to create calcined powder, forming it into a predetermined shape by dry pressing or the like, and then firing it.
この焼成装置においては、平板状のセラミック台板上に
成形体をのせ焼成するのが一般的である。In this firing apparatus, the molded body is generally placed on a flat ceramic base plate and fired.
第３図は従来の焼成装・置の要部を示す。図において、
（１）はセラミック製台板、（２）は焼成用成形体から
なる被焼成物を示す、この他、炉体、発熱体、いる。FIG. 3 shows the main parts of a conventional firing device/device. In the figure,
(1) indicates a ceramic base plate, and (2) indicates an object to be fired consisting of a molded body for firing.In addition, there is a furnace body and a heating element.
この様な従来装置で、被焼成物である成形体の焼成を行
う場合、次の如き問題があった。When firing a molded body, which is an object to be fired, using such a conventional apparatus, there were the following problems.
■ 平板状の合板上で焼成するため、被焼成物（２）と
合板（１）との接触面は、炉内雰囲気にさらされること
がなく、上記ＹＢＣＯ系の超電導体のように焼成中に酸
素を吸収して、結晶化する超電導体においては、焼成体
下面において酸素不足となり、全体として臨界特性が悪
くなる。■ Since firing is performed on a flat plywood, the contact surface between the object to be fired (2) and the plywood (1) is not exposed to the furnace atmosphere, and unlike the YBCO-based superconductor mentioned above, the contact surface between the object to be fired (2) and the plywood (1) is not exposed to the atmosphere during firing. In a superconductor that absorbs oxygen and crystallizes, there is a lack of oxygen at the bottom surface of the fired body, resulting in poor critical characteristics as a whole.
■ 台板材質を種々検討しても１合板と焼成体の接触面
積が大きいため、焼結した超電導体が合板に付着し易い
。■ Even when various base plate materials are considered, the contact area between the plywood and the sintered body is large, so the sintered superconductor tends to adhere to the plywood.
本発明は、上記の様な問題点を解決するためになされた
もので、例えばＹＢＣＯ系超電導体のように焼成中に酸
素の吸収を充分行う必要がある超電導体の焼成で充分の
酸素の供給が可能でかつ合板との付着防止ができ、その
ため焼結体の形状安定性が損われない超電導体が得られ
る焼成装置を得ることを目的としている。The present invention has been made to solve the above-mentioned problems, and provides sufficient oxygen during firing of superconductors, such as YBCO superconductors, which require sufficient absorption of oxygen during firing. The object of the present invention is to provide a sintering apparatus that can produce a superconductor that can prevent the superconductor from adhering to the plywood, and therefore does not impair the shape stability of the sintered body.
本発明に係る酸化物超電導体の焼成装置は、被焼成物を
支持し得ると共に、支持した被焼成物の背面部に酸素を
供給し得る酸素供給手段を備え、この酸素供給手段に被
焼成物を載置して焼成するよりに構成したものである。The sintering apparatus for oxide superconductors according to the present invention is equipped with an oxygen supply means capable of supporting an object to be sintered and capable of supplying oxygen to the back side of the supported object to be sintered. The structure is such that the material is placed and fired.
本発明における酸素供給手段は、載置した被焼成物の背
面部に対しても酸素を均一に供給し、被焼成物の酸素の
吸収を容易にする。また上記構成により、酸素供給手段
と被焼成物との付着を防ぐ。The oxygen supply means in the present invention uniformly supplies oxygen to the back surface of the placed object to be fired, thereby facilitating the absorption of oxygen by the object to be fired. Further, the above configuration prevents the oxygen supply means from adhering to the object to be fired.
以下一実施例により、本発明の詳細な説明する。 The present invention will be described in detail below with reference to one example.
第１図、第２図は本発明の一実施例及び他の実施例をそ
れぞれ示す図である。第１図において（１１）は、酸素
供給手段（１０）を構成する直径約３鶴の多数のアルミ
ナ球、（２）は被焼成物としての焼成用成形体であり、
アルミナ球（１１）は平面上で相互に隣接し、密に並べ
である。また第２図において、（１２）はアルミナ製の
直径約３目で長さ約１００ｆｉの円筒、各円筒は、平面
上で相互に隣接して密に並べてあり、その一端は封止ら
れ、別の一端より酸素ガスを導入（図示省略）し、小孔
（１３）より吹き出す構造となっており、これら複数の
円筒（１２）、図示しない酸素ガスの導入装置等によっ
て酸素ガス導入手段（１０）を構成している。酸化換起
を導体の製造は次の如く行った。FIGS. 1 and 2 are diagrams showing one embodiment and another embodiment of the present invention, respectively. In FIG. 1, (11) is a large number of alumina spheres with a diameter of about 3 mm constituting the oxygen supply means (10), (2) is a molded body for firing as an object to be fired,
The alumina spheres (11) are adjacent to each other on a plane and are closely arranged. In Fig. 2, (12) is a cylinder made of alumina with a diameter of about 3 meshes and a length of about 100 fi, each cylinder being closely arranged adjacent to each other on a plane, one end of which is sealed, and another. It has a structure in which oxygen gas is introduced from one end (not shown) and is blown out from a small hole (13), and the oxygen gas introduction means (10) is formed by these plural cylinders (12), an oxygen gas introduction device (not shown), etc. It consists of The oxidation-induced conductor was manufactured as follows.
原料粉として、Ｙ２Ｏ３，ＢａＣＯ３及びＣｕＯを焼成
後の超電導体としてＹＢａ２Ｃｕ３０７−δの組成とな
る割合で配合し、ボールミルで混合後、９００℃で５時
間仮焼し、これをボールミルで粉砕し、乾式プレス法に
より長さ８０ｓｎ、幅１０關及び厚さ２ｕの棒状成形体
からなる被焼成物を作成した。これを、酸素雰囲気の炉
において、１０００℃で３時間焼成し、超電導体を作成
した。焼成用台板あるいは酸素供給手段としては、従来
法によるアルミナ製の平板（１００ｎ＋Ｘ １００ｍＸ
５目目、アルミナ含有率９９．５％）及び本発明の実施
例によるアルミナ製の球（直径約３１露、アルミナ含有
率９９．５％）を相互に隣接して密に並べたもの、アル
ミナ製の円柱（直径３回、長さ１ｏｏｔｓ、アルミナ含
有率９９６５％）を相互に隣接して密に並べたもの、−
端を封止し、途中に小孔を多数もうけたアルミナ製の円
筒（直径３ｆｉ、長さ１０（１ｍ、アルミナ含有率９９
．５％）を相互に隣接して密に並ぺ、円筒内に酸素ガス
を導入し、上記小孔より吹き出すようにしたもの、そし
てアルミナ製の多孔性セラミック板（１００ｍＸ１００
ａ＋Ｘ４０Ｍ、アルミナ含有量９８％、標準セル数６
ｃｐｉ ）の５種類を用いた。As raw material powder, Y2O3, BaCO3, and CuO are blended in a ratio that will give a composition of YBa2Cu307-δ as a superconductor after firing, mixed in a ball mill, calcined at 900 ° C. for 5 hours, crushed in a ball mill, and dry-processed. A product to be fired consisting of a rod-shaped molded body having a length of 80 sn, a width of 10 mm and a thickness of 2 u was prepared by a pressing method. This was fired at 1000° C. for 3 hours in an oxygen atmosphere furnace to create a superconductor. As a base plate for firing or an oxygen supply means, an alumina flat plate (100n+X 100mX
5th item, alumina balls (diameter about 31 dew, alumina content 99.5%) according to the embodiment of the present invention are closely arranged adjacent to each other, alumina cylinders (3 times in diameter, 1 oots in length, alumina content 9965%) arranged closely adjacent to each other, -
An alumina cylinder with a sealed end and many small holes in the middle (diameter 3fi, length 10 (1m, alumina content 99)
．． 5%) were arranged closely adjacent to each other, oxygen gas was introduced into the cylinder, and was blown out from the small holes, and a porous ceramic plate made of alumina (100m
a+X40M, alumina content 98%, standard number of cells 6
Five types of cpi) were used.
焼成後、各合板あるいは酸素供給手段への付着状態の観
察及び液体窒素温度での焼成体の臨界温度、臨界電流の
測定を行った。測定結果を表１に示す、臨界特性値は、
各５個の試料の平均値を示した。After firing, the state of adhesion to each plywood or oxygen supply means was observed, and the critical temperature and critical current of the fired body at liquid nitrogen temperature were measured. The measurement results are shown in Table 1, and the critical characteristic values are:
The average value of each 5 samples is shown.
焼成体の付着状況は、従来装置の平板の場合は、付着が
大きく、ひどいものは焼成体をはがす時に割れてしまっ
た。本発明による酸素供給手段はいずれも付着が少く簡
単にはかれ、変形も少なかった。臨界温度については、
いずれも大差ない値でなお、上記実施例は、酸素供給手
段の材質としてハイ・アルミナについて述べたが、アル
ミナに超電導体も実施例に限定されるものではなく、例
えばＹを含まないものでも差支えない。Regarding the adhesion of the fired body, in the case of the flat plate of the conventional device, the adhesion was large, and in the case of severe adhesion, the fired body broke when peeled off. All of the oxygen supply means according to the present invention had little adhesion, were easily removed, and had little deformation. Regarding critical temperature,
There is not much difference between these values.Although the above embodiment describes high alumina as the material of the oxygen supply means, superconducting alumina is not limited to the embodiment, and for example, a material that does not contain Y may also be used. do not have.
また、上記実施例はこの発明の理解を容易にするために
示した例にすぎず、酸素供給手段（１０）の寸法、材質
など種々の変更、変形が可能であることは当然である。Further, the above-described embodiments are merely examples shown to facilitate understanding of the present invention, and it goes without saying that various changes and modifications can be made to the dimensions, material, etc. of the oxygen supply means (10).
例えば上記酸素供給手段（１０）が次に例示するもので
あっても上記実施例と同様の効果を期待することができ
る。For example, even if the oxygen supply means (10) is as exemplified below, the same effects as in the above embodiment can be expected.
■ 直径１ｆｉより５目の範囲で実質的に同一径を持つ
セラミック製の小球を平面上に密に並べたもの。■ Small ceramic spheres with substantially the same diameter within the range of 5 diameters from 1fi are densely arranged on a flat surface.
■ 直径１ｍより５龍の範囲で実質的に同一径を持つセ
ラミック製の円筒又は円柱を平面上に密い並べたもの。■ Ceramic cylinders or cylinders with substantially the same diameter within a range of 5 meters from 1 meter in diameter are closely arranged on a flat surface.
■ 連通孔を有する多孔性セラミックを板状にしたもの
、なお、この場合は酸素供給手段が合板を兼ねるように
構成したものである。(2) A porous ceramic plate having communicating holes; in this case, the oxygen supply means also serves as plywood.
■ 直径１＋ｍより５ｆｌの範囲で同一径を持つセラミ
ック製の円筒を平面上に密に並べ、被焼成物を載置する
部分に、小孔を開け、円筒内部に酸素ガスを通し、上記
小孔より吹き出すようにしたもの。■ Ceramic cylinders with the same diameter ranging from 1+m to 5 fl are arranged closely on a flat surface, a small hole is made in the part where the object to be fired is placed, oxygen gas is passed through the inside of the cylinder, and the above small hole is The one that makes it blow out more.
本発明によれば、これらいずれの構成でも被焼成物と酸
素供給手段の接触は小面積の独立の接触部が多数、はと
んど均一に分布することになり、成形体下面においても
炉内雰囲気に直接ふれることができ、雰囲気酸素の吸収
が容易となり、また、接触部が小面積のため付着が少な
く、かつ小面積の接触部が均一に多数あることより形状
安定性が保たれるものである。According to the present invention, in any of these configurations, the object to be fired and the oxygen supply means are in contact with each other in many small-area independent contact areas, which are distributed evenly, and even on the bottom surface of the compact inside the furnace. It can come into direct contact with the atmosphere, making it easier to absorb atmospheric oxygen, and since the contact area is small, there is less adhesion, and the shape stability is maintained because there are many small contact areas uniformly. It is.
さらに上記のような酸素供給手段に強制的に、酸素ガス
を導入することにより、成形体下面における酸素吸収を
助長することも可能である。Furthermore, by forcibly introducing oxygen gas into the oxygen supply means as described above, it is also possible to promote oxygen absorption on the lower surface of the molded article.
以上のように、本発明によれば、被焼成物を支持し得る
と共に、支持した被焼成物の下面部に酸素を供給し得る
酸素供給手段を備えるように構成したことにより、被焼
成物の下面における酸素吸収が容易となり、酸素含有量
の多い、臨界特性の良い酸化物超電導体が製作できる。As described above, according to the present invention, the object to be fired is supported by the oxygen supply means that can support the object to be fired and supply oxygen to the lower surface of the supported object to be fired. Oxygen absorption at the bottom surface becomes easy, and an oxide superconductor with high oxygen content and good critical properties can be manufactured.
また被ｇ８ＦＬ物の下面部に酸素を供給するため、被焼
成物と酸素供給手段との付着が少なく、小面積の接触部
が、均一に、多数あることより得られる焼成体（超電導
体）の形状安定性が保てる効果がある。In addition, since oxygen is supplied to the lower surface of the g8FL object, there is less adhesion between the object to be fired and the oxygen supply means, and the fired object (superconductor) obtained by uniformly and numerous small-area contact areas. This has the effect of maintaining shape stability.
第１図及び第２図は本発明の一実施例及び他の実施例の
要部をそれぞれ示す正面図である。第３図は従来装置の
要部を示す正面図である。
図において、（２）は被焼成物、（１０）は酸素供給手
段である。
なお、各図中、同一符号は同−又は相当部分を示す。FIGS. 1 and 2 are front views showing essential parts of one embodiment and another embodiment of the present invention, respectively. FIG. 3 is a front view showing the main parts of the conventional device. In the figure, (2) is an object to be fired, and (10) is an oxygen supply means. In each figure, the same reference numerals indicate the same or corresponding parts.
Claims (1)
し得ると共に、支持した被焼成物の下面部に酸素を供給
し得る酸素供給手段を備え、この酸素供給手段に被焼成
物を載置して焼成するようにしたことを特徴とする酸化
物超電導体の焼成装置。An apparatus for firing an oxide superconductor is provided with an oxygen supply means capable of supporting an object to be fired and supplying oxygen to the lower surface of the supported object to be fired, and the object to be fired is placed on the oxygen supply means. 1. An apparatus for firing an oxide superconductor, characterized in that the firing is performed by firing the oxide superconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63137290A JPH01308879A (en) | 1988-06-06 | 1988-06-06 | Sintering apparatus for oxide superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63137290A JPH01308879A (en) | 1988-06-06 | 1988-06-06 | Sintering apparatus for oxide superconductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01308879A true JPH01308879A (en) | 1989-12-13 |
Family
ID=15195227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63137290A Pending JPH01308879A (en) | 1988-06-06 | 1988-06-06 | Sintering apparatus for oxide superconductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01308879A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10945821B2 (en) | 2015-08-03 | 2021-03-16 | Amann Girrbach Ag | Sintered blank for producing a dental prosthesis |
-
1988
- 1988-06-06 JP JP63137290A patent/JPH01308879A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10945821B2 (en) | 2015-08-03 | 2021-03-16 | Amann Girrbach Ag | Sintered blank for producing a dental prosthesis |
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