JPH01242419A - Bi-pb-ca-sr-cu-o based superconducting material - Google Patents
Bi-pb-ca-sr-cu-o based superconducting materialInfo
- Publication number
- JPH01242419A JPH01242419A JP63069002A JP6900288A JPH01242419A JP H01242419 A JPH01242419 A JP H01242419A JP 63069002 A JP63069002 A JP 63069002A JP 6900288 A JP6900288 A JP 6900288A JP H01242419 A JPH01242419 A JP H01242419A
- Authority
- JP
- Japan
- Prior art keywords
- superconducting material
- superconducting
- chemical composition
- electrical resistance
- mechanical strength
- 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
- 239000000463 material Substances 0.000 title claims abstract description 35
- 239000000203 mixture Substances 0.000 claims abstract description 14
- 239000000126 substance Substances 0.000 claims abstract description 14
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 8
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 8
- 229910002480 Cu-O Inorganic materials 0.000 claims abstract 2
- 239000008188 pellet Substances 0.000 abstract description 9
- 230000007704 transition Effects 0.000 abstract description 5
- 238000003746 solid phase reaction Methods 0.000 abstract description 4
- 229910052797 bismuth Inorganic materials 0.000 abstract description 2
- 229910052802 copper Inorganic materials 0.000 abstract description 2
- 230000000977 initiatory effect Effects 0.000 abstract description 2
- 239000007858 starting material Substances 0.000 abstract description 2
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 abstract 2
- QPLDLSVMHZLSFG-UHFFFAOYSA-N Copper oxide Chemical compound [Cu]=O QPLDLSVMHZLSFG-UHFFFAOYSA-N 0.000 abstract 2
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(iii) oxide Chemical compound O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 abstract 2
- 229910000019 calcium carbonate Inorganic materials 0.000 abstract 1
- 235000010216 calcium carbonate Nutrition 0.000 abstract 1
- 229910052745 lead Inorganic materials 0.000 abstract 1
- HTUMBQDCCIXGCV-UHFFFAOYSA-N lead oxide Chemical compound [O-2].[Pb+2] HTUMBQDCCIXGCV-UHFFFAOYSA-N 0.000 abstract 1
- YEXPOXQUZXUXJW-UHFFFAOYSA-N lead(II) oxide Inorganic materials [Pb]=O YEXPOXQUZXUXJW-UHFFFAOYSA-N 0.000 abstract 1
- 229910000018 strontium carbonate Inorganic materials 0.000 abstract 1
- LEDMRZGFZIAGGB-UHFFFAOYSA-L strontium carbonate Chemical compound [Sr+2].[O-]C([O-])=O LEDMRZGFZIAGGB-UHFFFAOYSA-L 0.000 abstract 1
- 239000012071 phase Substances 0.000 description 9
- 239000000843 powder Substances 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000004570 mortar (masonry) Substances 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 238000010304 firing Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000009835 boiling Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 238000010298 pulverizing process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910014454 Ca-Cu Inorganic materials 0.000 description 1
- 229910003808 Sr-Cu Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002887 superconductor Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 230000002194 synthesizing effect Effects 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
Landscapes
- Inorganic Compounds Of Heavy Metals (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Superconductors And Manufacturing Methods Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は近時、液体窒素温度である７７に以上、場合に
よって更に高温の１００に以上で超電導を示す可能性が
あるとして注目されているＢ１−Ｃａ−Ｓｒ −Ｃｕ
−０系物質のＢｉを一部ｐｂで置換した超電導物質に関
するものである。[Detailed Description of the Invention] [Field of Industrial Application] The present invention has recently attracted attention as it has the potential to exhibit superconductivity at liquid nitrogen temperatures of 77 or higher, and in some cases even higher temperatures of 100 or higher. B1-Ca-Sr-Cu
This invention relates to a superconducting material in which Bi in a -0-based material is partially replaced with Pb.
最近、金属材料研究所よりＢ ｉ 、 Ｓｒ 、 Ｃａ
、 Ｃｕ ２の組成の焼結体が１２０にで電気抵抗が
減少しはじめ、約１０７Ｋまで急激に電気抵抗が落ちた
後、約７５にで電気抵抗がゼロになるとの発表があった
。Recently, the Institute of Metals Materials has introduced B i , Sr, Ca
It was announced that the electrical resistance of a sintered body with a composition of Cu 2 begins to decrease at 120 K, and after the electrical resistance rapidly drops to about 107 K, the electrical resistance becomes zero at about 75 K.
この発表によれば、この物質には電気抵抗がゼロになる
超電導遷移終了点が約１０５Ｋ（実験データから外挿し
て得た値）の超電導相（高Ｔｃ相）と約７５にの超電導
相（低Ｔｃ相）の２種類の超電導相が存在していて、全
体が完全に高Ｔｃ相の試料とはなっていないとのことで
あるが、この物質には、完全反磁性（マイスナー効果）
が認められるとのことであった。According to this announcement, this material has a superconducting transition end point at which electrical resistance becomes zero: a superconducting phase (high Tc phase) at about 105 K (value obtained by extrapolating from experimental data) and a superconducting phase (high Tc phase) at about 75 K. It is said that there are two types of superconducting phases: a low Tc phase), and the sample is not completely a high Tc phase, but this material has complete diamagnetism (Meissner effect).
It was said that this would be approved.
また、この物質は希土類を含まない超電導物質であり、
かつＹ −Ｂａ−Ｃｕ −０系に比して水等に安定であ
る点も特徴があると報じられた。Additionally, this material is a superconducting material that does not contain rare earth elements.
It was also reported that it is more stable in water etc. than the Y-Ba-Cu-0 system.
この発表があった後、日、米のみならず世界各国で、そ
の追試が行われたが、その−例は次のとおりである。After this announcement, follow-up tests were held not only in Japan and the United States, but also in other countries around the world. Examples of such tests are as follows.
即ち、無機材研等は、Ｂ１２（Ｃａ、Ｓｒ）３ｃｕｚｏ
ｑ或いはＢｉ２ （Ｃａ、 Ｓｒ） ３−ａｘｃＬＩｚ
ｏｑ−ａｙの組成の焼結体が約１１０により電気抵抗が
低下し始め約７０〜４０にでゼロとなることを発表した
。That is, inorganic materials research, etc., B12 (Ca, Sr) 3cuzo
q or Bi2 (Ca, Sr) 3-axcLIz
It was announced that the electrical resistance of a sintered body having a composition of 110 oq-ay starts to decrease at about 110 oq-ay and becomes zero at about 70-40 oq.
現在上に発表された３ｉ−ＣＢ−Ｓｒ Ｃｕ Ｏ系
物質は高Ｔｃ相、低Ｔｃ相が混在するものが多く、その
化学組成も種々異なる。Many of the 3i-CB-Sr Cu O-based materials currently published include a mixture of high Tc phase and low Tc phase, and their chemical compositions also vary.
また、本発明者の追試によれば、この物質は製法的にも
、試料の融点ぎりぎりの熱処理温度で処理しなければ高
臨界温度物質とならず、而もその温度制御の巾が例えば
８８０°Ｃで±２°Ｃ位の許容範囲しかない等、合成が
極めて困難であることが判明している。Further, according to additional tests conducted by the present inventors, this material does not become a high critical temperature material unless it is processed at a heat treatment temperature close to the melting point of the sample, and the width of the temperature control is, for example, 880°. It has been found that synthesis is extremely difficult, as the tolerance range is only about ±2°C.
更に問題は、この焼結体は焼結密度が低く、また往々に
して表面層と内部で組織が不均一で、脆弱な焼結体であ
り、製造過程の焼成中においても膨張する等の現象が起
こるという点であり、これを解決しなければ実用材料と
はなり得ないものである。A further problem is that this sintered body has a low sintered density, and the structure is often uneven between the surface layer and the inside, making it a brittle sintered body, and there are phenomena such as expansion during firing during the manufacturing process. occurs, and unless this problem is solved, it cannot be used as a practical material.
本発明者等はこの様な欠点を克服すべく、Ｂｉの一部を
ｐｂで置換するとともに、Ｂｉ、 Ｃｕの組成比を種々
変える等の研究を重ね、超電導臨界温度が少なくとも液
体窒素の沸点７７に以上で、条件次第では１１０に以上
にも達する物質の合成に成功し、同時にこの物質がｐｂ
を含まないＢｉ −Ｓｒ−Ｃａ−Ｃｕ −０系のそれに
比しＭｉ熾が均一で密度が高く機械的強度も極めて高く
なることを見出し、本発明に到達したものである。In order to overcome these drawbacks, the inventors of the present invention have repeatedly conducted research such as replacing a part of Bi with PB and variously changing the composition ratio of Bi and Cu, and have found that the superconducting critical temperature is at least as high as the boiling point of liquid nitrogen, 77. Based on the above, we succeeded in synthesizing a substance that can reach 110 or more depending on the conditions, and at the same time this substance has a pb
The present invention was achieved based on the discovery that the Mi layer is uniform, has a high density, and has extremely high mechanical strength compared to that of the Bi-Sr-Ca-Cu-0 system which does not contain any of the following.
即ち、本発明は金属材料研究所の発表したＢｉ。 That is, the present invention is based on Bi announced by the Institute for Metal Materials.
Ｓｒ、Ｃａ、Ｃｕ４０．Ｈにおいて、Ｂｉの一部をｐｂ
で置換した物質、更にはこれに加うるに構成各元素の組
成比をも変化させた物質を提供するものであり、更に詳
しくは、化学組成比が（Ｂｉ＋−ｘ Ｐｂｘ ）ｎ （
Ｓｒ、Ｃａ）ｚＣｕ、 （式中、ｘ、 ｎ、 ｙ
は０．１≦χ≦０．７５． ｎ−１〜２．０≦ｙ≦２
の値を示す。）で表される、少なくとも７７に以上の超
電導臨界温度をもち、機械的強度の高いＢｉ −Ｐｂ−
Ｃａ−Ｓｒ−Ｃｕ−０系超電導物質を提供するものであ
る。Sr, Ca, Cu40. In H, part of Bi is converted into pb
The present invention provides a substance in which the chemical composition ratio is (Bi+-xPbx)n (Bi+-xPbx)n(
Sr, Ca)zCu, (where x, n, y
is 0.1≦χ≦0.75. n-1~2.0≦y≦2
indicates the value of ), which has a superconducting critical temperature of at least 77 or higher and has high mechanical strength.
A Ca-Sr-Cu-0 based superconducting material is provided.
本発明は、この様に従来の旧−Ｓｒ−Ｃａ−Ｃｕ −０
系のＢｉの一部をｐｂで置換するものであるが、この際
ｐｂの置換量、即ち式中のＸ値が０．７５より大きいと
、物質が半導体になることが多く、逆に０．１より小さ
いと物質が従来のものに比較して大差のないものとなる
。The present invention thus overcomes the conventional old -Sr-Ca-Cu -0
Part of the Bi in the system is replaced with pb, but if the amount of pb substituted, that is, the X value in the formula, is larger than 0.75, the substance often becomes a semiconductor; If it is smaller than 1, the substance will not be much different from the conventional one.
上記の化合物は下記する方法によって製造することがで
きる。The above compound can be produced by the method described below.
即ち、原料としてＢ１ｚ０３＋ＳｒＣＯ：＋＋ＣａＣ０
ｚ、ＣｕＯ及びｐｂｏを出発原料としてそれぞれを所望
の比に秤量混合した後、第１段階で８００°Ｃで２４時
間空気中、電気炉中で加熱固相反応を行わせ、これを粉
砕して約１０００ ｋｇ／ｃｌ＋で加圧しペレットとし
た後、更に８３０°Ｃ〜８８０°Ｃで２４時間以上焼成
すればよい。That is, B1z03+SrCO:++CaC0 as a raw material
After weighing and mixing each of Z, CuO, and PBO as starting materials in the desired ratio, in the first step, a heating solid phase reaction was performed at 800°C for 24 hours in the air in an electric furnace, and this was pulverized. After pressurizing at about 1000 kg/cl+ to form pellets, the pellets may be further calcined at 830°C to 880°C for 24 hours or more.
この焼成ペレットの密度は、ｐｂを含まない同様の製法
によって得たペレットに比して表面、裏面、内部とも均
一でかつ高く、床上に落下させても高い金属音を発して
飛び上がり、これを繰り返しても破壊せず、実用的用途
に耐える機械的強度を有している。The density of these fired pellets is more uniform and higher on the front, back, and inside than pellets obtained by a similar manufacturing method that does not contain PB, and even when dropped on the floor, they fly up with a high-pitched metallic sound and repeat this process repeatedly. It has the mechanical strength to withstand practical use without breaking even when exposed to heat.
またこの焼成ペレットは超電導遷移開始温度が約１３０
に或いはそれ以下で超電導遷移終了温度が約１１０に或
いはそれ以下で少なくとも７７に以上である。In addition, this fired pellet has a superconducting transition initiation temperature of approximately 130
or less, the superconducting transition end temperature is about 110 or less and at least 77 or more.
実施例１
原料粉末としてＢｉｚＯ：＋、ＰｂＯ，ＳｒＣＯｉ＋Ｃ
ａＣＯ３及びＣｕＯを化学組成比がＢｉｏ、 ｑ Ｐｂ
ｏ、 ３ Ｓｒ＋ Ｃａｔ Ｃｕｔ、 ｎとなるように
秤量し、これを乳鉢にて充分混合粉砕した後、アルミナ
ボート中に入れ、８００°Ｃ２４時間 電気炉中、空気
中で加熱固相反応を行わせて黒色粉末を得た。この粉末
を乳鉢で再び充分混合粉砕した後、約１０００ ｋｇ／
ｃｆｆｌのプレスで直径約１ｃｍ、厚さ約１ｍｍの圧粉
体ペレットとなし、これを８４５°Ｃで８７時間電気炉
中加熱焼成した。Example 1 BizO:+, PbO, SrCOi+C as raw material powder
The chemical composition ratio of aCO3 and CuO is Bio, q Pb
o, 3 Sr + Cat Cut, n, was thoroughly mixed and pulverized in a mortar, placed in an alumina boat, and heated at 800°C for 24 hours in an electric furnace in air to perform a solid phase reaction. A black powder was obtained. After thoroughly mixing and pulverizing this powder in a mortar, it weighs about 1000 kg/
A compacted powder pellet having a diameter of about 1 cm and a thickness of about 1 mm was formed using a cffl press, and this was fired in an electric furnace at 845° C. for 87 hours.
このものの電気抵抗の温度変化は第１図に示す通りであ
る。本図からも明らかな通り、この物質の電気抵抗は１
３０により落下し始め、１２０により急激に落下し約１
１２にでゼロとなっており、この物質が極めて超伝導特
性に優れていることを認めた。The temperature change in electrical resistance of this material is as shown in FIG. As is clear from this figure, the electrical resistance of this material is 1
It started to fall by 30, then rapidly fell by 120, and about 1
12, and it was recognized that this material has extremely excellent superconducting properties.
また、マイスナー効果測定結果は、第２図に示す通り、
１００に以上で超電導体となることが確認された。In addition, the Meissner effect measurement results are as shown in Figure 2.
It was confirmed that a superconductor is formed when the concentration is 100 or more.
更に、本物質は実用上機械的強度の充分な焼結体となっ
ていた。Furthermore, this material was a sintered body with sufficient mechanical strength for practical use.
実施例２
実施例１における８４５°Ｃでの焼成時間を１４３時間
と変更し、他は同様に実施した。Example 2 The firing time at 845°C in Example 1 was changed to 143 hours, and the other procedures were the same.
本実施例で得た物質の、電気抵抗の温度変化は第３図に
示す通りである。本図からも明らかな通り、この物質の
電気抵抗は１４０により落下し始め、１３０により急激
に落下し約１２０にでゼロとなっており、この物質が極
めて超電導特性に優れていることを認めた。The temperature change in electrical resistance of the material obtained in this example is as shown in FIG. As is clear from this figure, the electrical resistance of this material begins to drop at 140, rapidly drops at 130, and reaches zero at about 120, confirming that this material has extremely excellent superconducting properties. .
実施例３
原料粉末としてＢｉｚＯ：＋＋ ＰｂＯ，ＳｒＣＯ，、
、ＣａＣ０：＋及びＣｕＯを、その焼成後の化学組成比
がＢｉｏ、ｓ Ｐｂｃ、５ Ｓｒ、 Ｃａ、 Ｃａｂ、
ｅ となるように秤量し、これを乳鉢で充分混合した後
、アルミナボート中に入れ８００°Ｃ２４時間 電気炉
中、空気中で加熱固相反応を行って黒色粉末を得た。こ
の黒色粉末を再び乳鉢で混合粉砕した後、約１０００ｋ
ｇ／ｃ１１１のプレスで直径約１ ｃｍ、厚さ約１値の
圧粉体ペレットとなし、これを８４５°Ｃ９３時間電気
炉中加熱焼成した。Example 3 BizO as raw material powder: ++ PbO, SrCO, .
, CaC0:+ and CuO, the chemical composition ratio after firing is Bio, s Pbc, 5 Sr, Ca, Cab,
After mixing thoroughly in a mortar, the mixture was placed in an alumina boat and subjected to a heating solid-phase reaction in air at 800° C. for 24 hours to obtain a black powder. After mixing and pulverizing this black powder in a mortar again, approximately 1000 kg
A compacted powder pellet having a diameter of approximately 1 cm and a thickness of approximately 1 value was formed by pressing at g/c 111, and this was heated and fired in an electric furnace at 845° C. for 93 hours.
このものの電気抵抗の温度変化は第４図に示す通りであ
る。図に示す通り電気抵抗は約１３０により急激に落下
し１１５にでゼロとなる。The temperature change in electrical resistance of this material is as shown in FIG. As shown in the figure, the electrical resistance suddenly drops at about 130 and becomes zero at 115.
また、本物質のマイスナー効果及び機械的強度は、実施
例１の場合と略同様の結果を示した。Furthermore, the Meissner effect and mechanical strength of this material showed substantially the same results as in Example 1.
実施例４及び５
原料粉末を、その化学組成比がＢｉｏ、 ｓ Ｐｂｏ、
ＩＴＳｒ６． ｓａ Ｃａｂ、 ＋ｂ Ｃｕ２となる
ように秤量したもの、及びＢｉｏ、ｂ６Ｐｂｏ、６６Ｓ
ｒｏ、ｂｂ Ｃａｂ、ｘｘ ＣＬＩ＋、７１１となるよ
うに秤量したものの２種類を用意することとした以外は
、実施例３と同様にして２種類の焼結体を得た。Examples 4 and 5 The chemical composition ratio of raw material powder was Bio, s Pbo,
ITSr6. sa Cab, weighed to be +b Cu2, and Bio, b6Pbo, 66S
Two types of sintered bodies were obtained in the same manner as in Example 3, except that two types were prepared by weighing ro, bb Cab, xx CLI+, and 711.
これら物質は、超電導特性、機械的強度とも、実施例１
と略同様の結果を示した。These materials had excellent superconducting properties and mechanical strength in Example 1.
Almost the same results were obtained.
本発明によるＢｉ −Ｐｂ Ｃａ Ｓｒ Ｃｕ−
０系物質は少なくとも液体窒素沸点７７に以上に超伝導
臨界温度があり、Ｙ −Ｂａ −Ｃｕ −０系と同程度
の８８にやさらに高温の１１０に以上に臨界温度をもつ
超電導物質である。Bi-PbCaSrCu- according to the present invention
The 0-series material is a superconducting material that has a superconducting critical temperature at least above the liquid nitrogen boiling point of 77, and has a critical temperature of 88, which is about the same as that of the Y-Ba-Cu-0 system, and even higher than 110.
この物質の製法は上記の如く容易であり、かつ再現性が
ある特徴をもっている。The method for producing this substance is easy and reproducible as described above.
しかも化合物の密度は表面、裏面、内部とも均一で緻密
であり、ｐｂを含まないＢｉ −Ｓｒ−Ｃａ−Ｃｕ −
０系の焼成物が密度が低く、脆弱であるに対して密度が
高く実用上充分な機械的強度をもち、しかも水に対して
はもちろん安定であるという特長を有しており、これは
実用材料として用いる場合極めて重要な点である。Moreover, the density of the compound is uniform and dense on the surface, back surface, and inside, and Bi-Sr-Ca-Cu-
Unlike the 0-series fired products, which have a low density and are brittle, it has a high density and sufficient mechanical strength for practical use, and is also stable against water, which makes it suitable for practical use. This is an extremely important point when used as a material.
第１図は、実施例１で得た物質の電気抵抗−温度相関図
であり、第２図は同物質の交流帯磁率−温度相関図であ
る。
第３図は、実施例２で得た物質の、また第４図は、実施
例３で′得た物質の、夫々電気抵抗−温度相関図である
。FIG. 1 is an electrical resistance-temperature correlation diagram of the material obtained in Example 1, and FIG. 2 is an AC magnetic susceptibility-temperature correlation diagram of the same material. FIG. 3 is an electrical resistance-temperature correlation diagram of the material obtained in Example 2, and FIG. 4 is an electrical resistance-temperature correlation diagram of the material obtained in Example 3.
Claims (1)
Ｓｒ，Ｃａ）＿２Ｃｕ＿ｙ（式中、ｘ，ｎ，ｙは０．１
≦ｘ≦０．７５，ｎ＝１〜２，０≦ｙ≦２の値を示す。 ）で表されるＢｉ−Ｐｂ−Ｃａ−Ｓｒ−Ｃｕ−Ｏ系超電
導物質。(1) The chemical composition ratio is (Bi_1_-_xPb_x)n(
Sr, Ca)_2Cu_y (where x, n, y are 0.1
The values are ≦x≦0.75, n=1 to 2, and 0≦y≦2. ) Bi-Pb-Ca-Sr-Cu-O based superconducting material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63069002A JPH01242419A (en) | 1988-03-23 | 1988-03-23 | Bi-pb-ca-sr-cu-o based superconducting material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63069002A JPH01242419A (en) | 1988-03-23 | 1988-03-23 | Bi-pb-ca-sr-cu-o based superconducting material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01242419A true JPH01242419A (en) | 1989-09-27 |
Family
ID=13389955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63069002A Pending JPH01242419A (en) | 1988-03-23 | 1988-03-23 | Bi-pb-ca-sr-cu-o based superconducting material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01242419A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01290530A (en) * | 1988-05-14 | 1989-11-22 | Sumitomo Electric Ind Ltd | Multiple oxides superconducting material and production thereof |
| JPH01308803A (en) * | 1988-06-08 | 1989-12-13 | Mitsubishi Electric Corp | Production of oxide superconductor |
| JPH029721A (en) * | 1988-03-25 | 1990-01-12 | Canon Inc | Metal oxide material |
| JPH0226879A (en) * | 1988-07-13 | 1990-01-29 | Toray Ind Inc | Superconducting material |
-
1988
- 1988-03-23 JP JP63069002A patent/JPH01242419A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH029721A (en) * | 1988-03-25 | 1990-01-12 | Canon Inc | Metal oxide material |
| JPH01290530A (en) * | 1988-05-14 | 1989-11-22 | Sumitomo Electric Ind Ltd | Multiple oxides superconducting material and production thereof |
| JPH01308803A (en) * | 1988-06-08 | 1989-12-13 | Mitsubishi Electric Corp | Production of oxide superconductor |
| JPH0226879A (en) * | 1988-07-13 | 1990-01-29 | Toray Ind Inc | Superconducting material |
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