JPS63260820A - Superconductor - Google Patents
SuperconductorInfo
- Publication number
- JPS63260820A JPS63260820A JP62095212A JP9521287A JPS63260820A JP S63260820 A JPS63260820 A JP S63260820A JP 62095212 A JP62095212 A JP 62095212A JP 9521287 A JP9521287 A JP 9521287A JP S63260820 A JPS63260820 A JP S63260820A
- Authority
- JP
- Japan
- Prior art keywords
- superconductor
- magnetic field
- critical temperature
- firing
- blend
- 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.)
- Granted
Links
- 239000002887 superconductor Substances 0.000 title claims abstract description 15
- 229910052802 copper Inorganic materials 0.000 claims abstract description 14
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 6
- 150000001875 compounds Chemical class 0.000 claims abstract description 5
- 239000010949 copper Substances 0.000 claims description 17
- 229910052746 lanthanum Inorganic materials 0.000 claims description 11
- 229910052688 Gadolinium Inorganic materials 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 5
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical compound [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 claims description 5
- 239000001301 oxygen Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 150000002603 lanthanum Chemical class 0.000 claims description 3
- 229910052777 Praseodymium Inorganic materials 0.000 claims description 2
- UIWYJDYFSGRHKR-UHFFFAOYSA-N gadolinium atom Chemical compound [Gd] UIWYJDYFSGRHKR-UHFFFAOYSA-N 0.000 claims description 2
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 claims description 2
- 239000000203 mixture Substances 0.000 abstract description 13
- 238000010304 firing Methods 0.000 abstract description 7
- 239000000843 powder Substances 0.000 abstract description 6
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract description 2
- 238000002156 mixing Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 description 9
- 239000002244 precipitate Substances 0.000 description 9
- 239000000126 substance Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 150000002823 nitrates Chemical class 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 3
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 235000006408 oxalic acid Nutrition 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000000956 alloy Substances 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000001307 helium Substances 0.000 description 2
- 229910052734 helium Inorganic materials 0.000 description 2
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910020012 Nb—Ti Inorganic materials 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000000975 co-precipitation Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N—ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10N60/00—Superconducting devices
- H10N60/80—Constructional details
- H10N60/85—Superconducting active materials
- H10N60/855—Ceramic materials
- H10N60/857—Ceramic materials comprising copper oxide
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は超電導体に関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to superconductors.
［従来の技術］
従来、検討された超電導体は主として金属、合金系であ
り、Ｓｎ、ＡＩ等多くの金属元素、又、Ｎｂ−Ｔｉ、Ｗ
ｂ−Ｇｅ、Ｗｂ−９ｎ等の合金が知られている。[Prior art] Superconductors that have been studied so far are mainly metal and alloy-based, including many metal elements such as Sn and AI, as well as Nb-Ti and W.
Alloys such as b-Ge and Wb-9n are known.
しかしこれらの材料の臨界温度は最高でも２０に付近で
ありこのためデバイス化した際高価な液体ヘリウムで冷
却しなければ使用出来ないという欠点があった。また最
近の報告にＢａ−Ｌａ−Ｃｕ−０系の超電導性に関する
ものがあるが（Ｚ、Ｐｈｙ＋、Ｂ： Ｊ、Ｇ、Ｂａｄｎ
ｏｒｙ ａｎｄ Ｋ、Ａ、）Ｉｕｌｌｅｒ、８４．１８
９，１９８６）この物質系に於いても臨界温度は３５に
であり、又臨界磁界はθＯＴでありその超電導特性は実
用的観点からみると充分満足し得るものではなかった・
［発明が解決しようとする問題点］
本発明の目的は従来の超電導体が有していた前述の欠点
を解消しようとするものであり、液体ヘリウム以上の高
温で充分使用可能な超電導体を新規に提供しようとする
ものである。However, the critical temperature of these materials is around 20°C at most, so when they are made into devices, they have the disadvantage that they cannot be used unless they are cooled with expensive liquid helium. In addition, there are recent reports regarding the superconductivity of the Ba-La-Cu-0 system (Z, Phy+, B: J, G, Badn
ory and K.A.) Iuller, 84.18
9, 1986) Even in this material system, the critical temperature is 35, and the critical magnetic field is θOT, so its superconducting properties are not fully satisfactory from a practical standpoint. The purpose of the present invention is to eliminate the above-mentioned drawbacks of conventional superconductors, and to provide a new superconductor that can be used satisfactorily at temperatures higher than liquid helium. It is something.
［問題点を解決するための手段］
すなわち本発明はランタンを除くランタン系列元素（Ａ
）、ランタン（Ｌａ）、銅（Ｃｕ）、酸素（０）を含む
化合物よりなることを特徴とする超電導体を提供するも
のである。[Means for Solving the Problems] That is, the present invention uses lanthanum series elements (A
), lanthanum (La), copper (Cu), and oxygen (0).
以下に本発明における超電導体に関して説明する。本発
明における超電導体はランタンを除くランタン系列元素
（Ａ）、ランタン（Ｌａ）、銅（Ｃｕ）、酸素（０）を
含む化合物であることが必要であり、好ましい組成式と
しては
ＡＨＬａ２−ｇＣｕＬ−ｙ （０＜ ｘ ＜ ２ ＋
０≦ｙ≦２）、或いはＡｌＩＬａｔ−ｘｃｕ０３−ｙ（
０＜ ｘ ＜ １ 、０≦ｙ≦１．５）が挙げられる。The superconductor in the present invention will be explained below. The superconductor in the present invention needs to be a compound containing a lanthanum series element (A) excluding lanthanum, lanthanum (La), copper (Cu), and oxygen (0), and a preferable composition formula is AHLa2-gCuL- y (0< x < 2 +
0≦y≦2), or AlILat-xcu03-y(
0<x<1, 0≦y≦1.5).
製法としては種々考えられるが代表的なものとして固相
での焼結法が挙げられる。すなわちＡ、Ｌａ、Ｃｕか所
定のモル比となる様に各々の酸化物或いは炭酸塩粉末ま
たは前２者の混合物を焼成する。焼成温度は８００−９
５０℃好ましくは８５０−９００℃が適当である。Various manufacturing methods can be considered, but a typical example is a solid phase sintering method. That is, each oxide or carbonate powder or a mixture of the former two is fired so that a predetermined molar ratio of A, La, and Cu is achieved. Firing temperature is 800-9
A temperature of 50°C, preferably 850-900°C is suitable.
焼成に際しては本焼成の前に粉末を仮焼成した後、成型
して本焼成する等の方法も使用し得る。焼成雰囲気とし
ては空気中でも可能であるが酸素含有量を調整する為に
、酸素分圧の異なるガスを適宜使用することか出来る。For firing, a method may also be used in which the powder is temporarily fired before the main firing, and then the powder is shaped and then the main firing is performed. The firing atmosphere can be in air, but in order to adjust the oxygen content, gases with different oxygen partial pressures can be used as appropriate.
また他の製法としては前述の方法以外に共沈法も使用し
得る。すなわちＡ、Ｌａ、Ｃｕが所定のモル比となる様
に各々の硝酸塩を定量して水に溶かす、この水溶液にシ
ュウ酸を加え、アンモニア水等でｐＨな調整して生成し
た沈殿を濾過乾燥する。Further, as another production method, a coprecipitation method may be used in addition to the above-mentioned method. That is, each nitrate is determined and dissolved in water so that A, La, and Cu have a predetermined molar ratio, oxalic acid is added to this aqueous solution, the pH is adjusted with aqueous ammonia, etc., and the resulting precipitate is filtered and dried. .
焼成は前述の方法と同様に行い得るゆ
以上の化学的方法に加えて従来の半導体製造のドライプ
ロセスに使用されてきた種々の方法すなわちスパッタリ
ング、ＣＶＤ 、真空蒸着等の方法も採用可能である。In addition to the above-mentioned chemical methods that can be used for baking, it is also possible to employ various methods that have been used in conventional dry processes for semiconductor manufacturing, such as sputtering, CVD, and vacuum evaporation.
これらの方法は特に薄膜作製時に有効である。These methods are particularly effective when producing thin films.
本発明において、Ａとしてはプラセオジム（Ｐ「）及び
／又はガドリニウム（Ｇｄ）が特に好ましい。In the present invention, A is particularly preferably praseodymium (P'') and/or gadolinium (Gd).
［作 用］
本発明において得られる物質の超電−導機構は必ずしも
明確ではないが、新規な組成を有しているために高臨界
温度、高臨界磁界を達成し得るものと考えられる。[Function] Although the superconducting mechanism of the substance obtained in the present invention is not necessarily clear, it is thought that it can achieve a high critical temperature and a high critical magnetic field because it has a novel composition.
［実施例］
実施例１゜
Ｐｒ、Ｌａ、Ｃｕの硝酸塩を各々Ｐｒ：Ｌａ：Ｃｕ−０
，６：０．４：１．０（モル比：以下同じ）となる様に
秤量し、攪拌しながら純水に溶解させる。この溶液にあ
らかじめ調整したＰｒ、Ｌａ、Ｃｕの硝酸塩のモル数の
総和と同じモル濃度のシュウ酸溶液を滴下し、更にアン
モニア水でｐＨを６程度に調整し沈殿を生成させる。こ
の沈殿を濾過し乾燥する。乾燥させた沈殿物を空気中９
００℃で１ｈ仮焼する。[Example] Example 1゜Nitrates of Pr, La, and Cu were respectively Pr:La:Cu-0
, 6:0.4:1.0 (molar ratio: the same hereinafter), and dissolved in pure water with stirring. An oxalic acid solution having the same molar concentration as the total number of moles of Pr, La, and Cu nitrates prepared in advance is added dropwise to this solution, and the pH is further adjusted to about 6 with aqueous ammonia to form a precipitate. This precipitate is filtered and dried. 9. Dried precipitate in air
Calcinate at 00°C for 1 hour.
仮焼した沈殿物を粉末状に砕き、プレスで成型した後空
気中９００℃で１ｈ焼成する。The calcined precipitate is crushed into powder, molded using a press, and then calcined in air at 900°C for 1 hour.
この様にして作製した物質の組成式は
Ｐ ｒ□、 ａＬａｏ、 ４ＣｕＯｔ、 ｒでその臨界
温度は５７Ｋ、臨界磁界は７５Ｔであった。The composition of the material thus produced was P r□, aLao, 4CuOt, r, and its critical temperature was 57K and critical magnetic field was 75T.
実施例２
Ｐｒ、Ｌａ、Ｃｕの硝酸塩をＰｒ：Ｌａ：Ｃｕ−０，６
：０．４：１．０となる様に秤量した以外は実施例１と
同様に行った。Example 2 Pr, La, Cu nitrates Pr:La:Cu-0,6
The same procedure as in Example 1 was carried out except that the weight ratio was 0.4:1.0.
得られた物質の組成式Ｐｒｏ、 ５Ｌａｏ、 ４Ｃｕｂ
ａ、 ｏでその臨界温度は５３に、ｗ４界磁界は７１Ｔ
でありだ。Composition formula of the obtained substance Pro, 5Lao, 4Cub
At a, o, its critical temperature is 53, and the w4 field is 71T.
It's true.
実施例３
Ｐｒ、Ｌａ、Ｃｕの酸化物を各々Ｐｒ：Ｌａ：Ｃｕｍ０
．６：０．４：１．０となる様に秤量しボールミル中で
混合した。Example 3 Oxides of Pr, La, and Cu were each Pr:La:Cum0
．． They were weighed and mixed in a ball mill so that the ratio was 6:0.4:1.0.
以下混合物の焼成は実施例１と同様に行った。得られた
物質の組成式はＰｒｏ、 ｇＬａｏ、 Ｊｕ０２．７で
その臨界温度は５３Ｋ、臨界磁界は７１Ｔであった。The mixture was then fired in the same manner as in Example 1. The compositional formula of the obtained substance was Pro, gLao, Ju02.7, its critical temperature was 53K, and its critical magnetic field was 71T.
実施例４
Ｐｒ、Ｌａ、Ｃ：ｕの硝酸塩をＰｒ：Ｌａ：Ｃｕ−０，
６：１．４：１．０となるように秤量した以外は実施例
１と同様に行った。得られた物質の組成式は
Ｐｒｏ、 ｓＬａ、 ４ＣＬＩ０３．３であった。この
物質の臨界温度は５２Ｋ、臨界磁界は７０Ｔであった。Example 4 Nitrate of Pr, La, C:u was converted into Pr:La:Cu-0,
The same procedure as in Example 1 was carried out except that the weight ratio was 6:1.4:1.0. The compositional formula of the obtained substance was Pro, sLa, 4CLI03.3. The critical temperature of this material was 52K and the critical magnetic field was 70T.
実施例５
Ｇｄ、Ｌａ、Ｃｕの硝酸塩を各々Ｇｄ：Ｌａ：Ｃｕ−０
，６：０．４＝１．０となる様に秤量し、攪拌しながら
純水に溶解させる。この溶液にあらかじめ調整したＧｄ
。Example 5 Nitrates of Gd, La, and Cu were each converted into Gd:La:Cu-0
, 6:0.4=1.0, and dissolved in pure water with stirring. Gd prepared in advance in this solution
.
Ｌａ、Ｃｕの硝酸塩のモル数の総和と同じモル濃度のシ
ュウ酸溶液を滴下し、更にアンモニア水でｐＨな６程度
に調整し沈殿を生成させる。この沈殿を濾過し乾燥する
。乾燥させた沈殿物を空気中９００°Ｃ１ｈ仮焼する。An oxalic acid solution having the same molar concentration as the total number of moles of La and Cu nitrates is added dropwise, and the pH is further adjusted to about 6 with aqueous ammonia to form a precipitate. This precipitate is filtered and dried. The dried precipitate is calcined in air at 900°C for 1 hour.
仮焼し゛た沈殿物を粉末状に砕き、プレスで成型した後
空気中９００℃でｌｈ焼成する。The calcined precipitate is crushed into powder, molded using a press, and then fired in air at 900°C for 1 hour.
この様にして作製した物質の組成式は
Ｇｄｏ、 ａＬａｏ、 ４Ｃｕｌｔ、 ｔでその臨界温
度は５５Ｋ、臨界磁界は７２Ｔであった。The compositional formula of the material thus produced was Gdo, aLao, 4Cult, t, its critical temperature was 55K, and its critical magnetic field was 72T.
実施例６
Ｇｄ、Ｌａ、Ｃｕの硝酸塩を各々Ｇｄ：Ｌａ：Ｃｕ＝０
．６：１．４：１となる様に秤量した以外は実施例５と
同様に行った。Example 6 Nitrate of Gd, La, and Cu respectively Gd:La:Cu=0
．． The same procedure as in Example 5 was carried out except that the weight ratio was 6:1.4:1.
得られた物質の組成式はＧｄｏ、 ５Ｌａ１．４Ｃｕ０
３． Ｉでその臨界温度は５２Ｋ、臨界磁界は７１Ｔで
あった。The composition formula of the obtained substance is Gdo, 5La1.4Cu0
3. The critical temperature was 52K and the critical magnetic field was 71T.
実施例７
Ｇｄ、Ｌａ、Ｃｕの酸化物を各々Ｇｄ：Ｌａ：ＣｕＪ、
６：０．４：１．０となる様に秤量しボールミル中で混
合した。以下混合物の焼成は実施例５と同様に行った。Example 7 Oxides of Gd, La, and Cu were prepared as Gd:La:CuJ, respectively.
They were weighed and mixed in a ball mill so that the ratio was 6:0.4:1.0. The mixture was then fired in the same manner as in Example 5.
得られた物質の組成式はＧｄｏ、 ５Ｌａｏ４Ｃｕｌｔ
、 ｏでその臨界温度は５１Ｋ、臨界磁界は７３Ｔであ
った。The composition formula of the obtained substance is Gdo, 5Lao4Cult
, o, its critical temperature was 51K, and its critical magnetic field was 73T.
［発明の効果］
以上説明したように本発明の超電導体では、従来の超電
導体において不可能であった臨界温度は５０に以上、臨
界磁界は７０７以上が実現出来る。このことより液体水
素或いは液体ネオンによる超電導デバイスが作製可能と
なる。[Effects of the Invention] As explained above, the superconductor of the present invention can achieve a critical temperature of 50 or more and a critical magnetic field of 707 or more, which were impossible in conventional superconductors. This makes it possible to fabricate superconducting devices using liquid hydrogen or liquid neon.
Claims (1)
（Ｌａ）、銅（Ｃｕ）及び酸素を含む化合物からなる超
電導体。 ２、化合物がＡ＿ｘＬａ＿２＿−＿ｘＣｕＯ＿４＿−＿
ｙ（但し、０＜ｘ＜２、０≦ｙ≦２）の組成式を有する
特許請求の範囲第１項の超電導体。 ３、化合物がＡ＿ｘＬａ＿１＿−＿ｘＣｕＯ＿３＿−＿
ｙ（但し、０＜ｘ＜１、０≦ｙ≦１．５）の組成式を有
する特許請求の範囲第１項の超電導体。 ４、Ａがプラセオジム（Ｐｒ）及び／又はガドリニウム
（Ｇｄ）である特許請求の範囲第１〜３項いずれかの超
電導体。[Claims] 1. A superconductor comprising a compound containing a lanthanum series element (A) other than lanthanum, lanthanum (La), copper (Cu), and oxygen. 2. The compound is A_xLa_2_-_xCuO_4_-_
The superconductor according to claim 1, which has a compositional formula of y (0<x<2, 0≦y≦2). 3. The compound is A_xLa_1_-_xCuO_3_-_
The superconductor according to claim 1, which has a compositional formula of y (0<x<1, 0≦y≦1.5). 4. The superconductor according to any one of claims 1 to 3, wherein A is praseodymium (Pr) and/or gadolinium (Gd).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62095212A JPS63260820A (en) | 1987-04-20 | 1987-04-20 | Superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62095212A JPS63260820A (en) | 1987-04-20 | 1987-04-20 | Superconductor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63260820A true JPS63260820A (en) | 1988-10-27 |
| JPH0579607B2 JPH0579607B2 (en) | 1993-11-04 |
Family
ID=14131442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62095212A Granted JPS63260820A (en) | 1987-04-20 | 1987-04-20 | Superconductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63260820A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS643012A (en) * | 1987-03-27 | 1989-01-06 | Sumitomo Electric Ind Ltd | Superconducting material and production thereof |
-
1987
- 1987-04-20 JP JP62095212A patent/JPS63260820A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS643012A (en) * | 1987-03-27 | 1989-01-06 | Sumitomo Electric Ind Ltd | Superconducting material and production thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0579607B2 (en) | 1993-11-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |