JPH01275432A - Synthetic method of raw material powder for oxide superconductor - Google Patents
Synthetic method of raw material powder for oxide superconductorInfo
- Publication number
- JPH01275432A JPH01275432A JP63101901A JP10190188A JPH01275432A JP H01275432 A JPH01275432 A JP H01275432A JP 63101901 A JP63101901 A JP 63101901A JP 10190188 A JP10190188 A JP 10190188A JP H01275432 A JPH01275432 A JP H01275432A
- Authority
- JP
- Japan
- Prior art keywords
- water
- raw material
- material powder
- component
- acid
- 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 19
- 239000002994 raw material Substances 0.000 title claims abstract description 18
- 239000000843 powder Substances 0.000 title claims abstract description 17
- 238000010189 synthetic method Methods 0.000 title 1
- 238000000034 method Methods 0.000 claims abstract description 18
- 229910002480 Cu-O Inorganic materials 0.000 claims abstract 2
- 230000002194 synthesizing effect Effects 0.000 claims description 8
- 238000000975 co-precipitation Methods 0.000 abstract description 17
- 229910052751 metal Inorganic materials 0.000 abstract description 13
- 239000002184 metal Substances 0.000 abstract description 13
- MUBZPKHOEPUJKR-UHFFFAOYSA-N Oxalic acid Chemical compound OC(=O)C(O)=O MUBZPKHOEPUJKR-UHFFFAOYSA-N 0.000 abstract description 12
- RGHNJXZEOKUKBD-SQOUGZDYSA-N Gluconic acid Natural products OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C(O)=O RGHNJXZEOKUKBD-SQOUGZDYSA-N 0.000 abstract description 9
- 239000002253 acid Substances 0.000 abstract description 9
- 239000013522 chelant Substances 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 8
- 239000008139 complexing agent Substances 0.000 abstract description 7
- RGHNJXZEOKUKBD-UHFFFAOYSA-N D-gluconic acid Natural products OCC(O)C(O)C(O)C(O)C(O)=O RGHNJXZEOKUKBD-UHFFFAOYSA-N 0.000 abstract description 5
- 235000012208 gluconic acid Nutrition 0.000 abstract description 5
- 239000000174 gluconic acid Substances 0.000 abstract description 5
- 235000006408 oxalic acid Nutrition 0.000 abstract description 4
- 239000003795 chemical substances by application Substances 0.000 abstract description 3
- 229910052802 copper Inorganic materials 0.000 abstract description 3
- 150000003839 salts Chemical class 0.000 abstract description 3
- FBPFZTCFMRRESA-KVTDHHQDSA-N D-Mannitol Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-KVTDHHQDSA-N 0.000 abstract description 2
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 abstract description 2
- 229930195725 Mannitol Natural products 0.000 abstract description 2
- 239000000594 mannitol Substances 0.000 abstract description 2
- 235000010355 mannitol Nutrition 0.000 abstract description 2
- 239000002904 solvent Substances 0.000 abstract description 2
- 235000000346 sugar Nutrition 0.000 abstract description 2
- KXDHJXZQYSOELW-UHFFFAOYSA-N Carbamic acid Chemical compound NC(O)=O KXDHJXZQYSOELW-UHFFFAOYSA-N 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 238000001914 filtration Methods 0.000 abstract 1
- 230000001376 precipitating effect Effects 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000000243 solution Substances 0.000 description 11
- 239000007864 aqueous solution Substances 0.000 description 9
- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 6
- 150000001875 compounds Chemical class 0.000 description 5
- 235000019441 ethanol Nutrition 0.000 description 5
- 239000002244 precipitate Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000011550 stock solution Substances 0.000 description 4
- FEWJPZIEWOKRBE-JCYAYHJZSA-N Dextrotartaric acid Chemical compound OC(=O)[C@H](O)[C@@H](O)C(O)=O FEWJPZIEWOKRBE-JCYAYHJZSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- FEWJPZIEWOKRBE-UHFFFAOYSA-N Tartaric acid Natural products [H+].[H+].[O-]C(=O)C(O)C(O)C([O-])=O FEWJPZIEWOKRBE-UHFFFAOYSA-N 0.000 description 3
- 235000002906 tartaric acid Nutrition 0.000 description 3
- 239000011975 tartaric acid Substances 0.000 description 3
- SRBFZHDQGSBBOR-IOVATXLUSA-N D-xylopyranose Chemical compound O[C@@H]1COC(O)[C@H](O)[C@H]1O SRBFZHDQGSBBOR-IOVATXLUSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- 150000001298 alcohols Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002823 nitrates Chemical class 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- LESFYQKBUCDEQP-UHFFFAOYSA-N tetraazanium;2-[2-[bis(carboxylatomethyl)amino]ethyl-(carboxylatomethyl)amino]acetate Chemical compound N.N.N.N.OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O LESFYQKBUCDEQP-UHFFFAOYSA-N 0.000 description 2
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 description 1
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 description 1
- RFSUNEUAIZKAJO-ARQDHWQXSA-N Fructose Chemical compound OC[C@H]1O[C@](O)(CO)[C@@H](O)[C@@H]1O RFSUNEUAIZKAJO-ARQDHWQXSA-N 0.000 description 1
- 229930091371 Fructose Natural products 0.000 description 1
- 239000005715 Fructose Substances 0.000 description 1
- 150000001447 alkali salts Chemical class 0.000 description 1
- 239000003125 aqueous solvent Substances 0.000 description 1
- PYMYPHUHKUWMLA-UHFFFAOYSA-N arabinose Natural products OCC(O)C(O)C(O)C=O PYMYPHUHKUWMLA-UHFFFAOYSA-N 0.000 description 1
- ZXVOCOLRQJZVBW-UHFFFAOYSA-N azane;ethanol Chemical compound N.CCO ZXVOCOLRQJZVBW-UHFFFAOYSA-N 0.000 description 1
- SRBFZHDQGSBBOR-UHFFFAOYSA-N beta-D-Pyranose-Lyxose Natural products OC1COC(O)C(O)C1O SRBFZHDQGSBBOR-UHFFFAOYSA-N 0.000 description 1
- 238000001354 calcination Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 125000004432 carbon atom Chemical group C* 0.000 description 1
- 150000001735 carboxylic acids Chemical class 0.000 description 1
- 230000009920 chelation Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000003841 chloride salts Chemical class 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 229940071106 ethylenediaminetetraacetate Drugs 0.000 description 1
- -1 fructose and xylose Chemical compound 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 150000002772 monosaccharides Chemical class 0.000 description 1
- 150000007524 organic acids Chemical class 0.000 description 1
- 235000005985 organic acids Nutrition 0.000 description 1
- 238000010979 pH adjustment Methods 0.000 description 1
- 239000008188 pellet Substances 0.000 description 1
- 235000002639 sodium chloride Nutrition 0.000 description 1
- 239000000600 sorbitol Substances 0.000 description 1
- 235000010356 sorbitol Nutrition 0.000 description 1
- 238000000967 suction filtration Methods 0.000 description 1
- 150000008163 sugars Chemical class 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 239000003799 water insoluble solvent Substances 0.000 description 1
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、酸化物超電導体の原料粉末の合成法に関し、
更に詳しくはＢｉ−３ｒ−Ｃａ−Ｃｕ−０系酸化物超電
導体の原料粉末を製造する方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for synthesizing raw material powder for an oxide superconductor,
More specifically, the present invention relates to a method for producing raw material powder for a Bi-3r-Ca-Cu-0 based oxide superconductor.
酸化物超電導体についてはすでにいくつかの酸化物系超
電導体が知られおり、その原料粉末の製造法としてもゾ
ル−ゲルや共沈法等が知られている。Regarding oxide superconductors, several oxide-based superconductors are already known, and sol-gel and coprecipitation methods are also known as methods for producing their raw material powders.
このうちＢｉ−Ｓｒ−Ｃａ−Ｃｕ−０系酸化物超電導体
の原料粉末の合成法としては、共沈法でこれを合成する
方法は従来行われておらず、またその原理等の報告も全
く見当たらない。Among these methods, as a method for synthesizing raw material powder for Bi-Sr-Ca-Cu-0 based oxide superconductors, there has been no method of synthesizing this by coprecipitation, and there have been no reports on its principles, etc. Not found.
その理由は、Ｂｉ酸成分これを共沈せしめるために水に
溶解すると簡単に加水分解して塩基性の沈澱を生成する
ためと考えられる。The reason for this is thought to be that when the Bi acid component is dissolved in water for coprecipitation, it is easily hydrolyzed to form a basic precipitate.
本発明者は、酸化物超電導体のうち、特に、Ｂｉ−Ｓｒ
−Ｃａ−Ｃｕ−０系酸化物超電導体について共沈法を用
いて上記超電導体の原料粉末を合成し得る方法を開発す
べく研究を続けた結果、これを合成し得る新しい方法を
見出した。The present inventor has discovered that among oxide superconductors, in particular, Bi-Sr
As a result of continuing research to develop a method for synthesizing raw material powder for the -Ca-Cu-0 based oxide superconductor using a coprecipitation method, we discovered a new method for synthesizing it.
この新しい合成法は、Ｂｉ−Ｓｒ−Ｃａ−Ｃｕ−０系酸
化物超電導体の原料粉末を合成するに際し、Ｂｉ酸成分
水溶性キレート化合物として水に溶解せしめ、Ｓｒ、Ｃ
ａ及びＣｕの各成分を溶存する？８ ｐ（ｌと共に沈澱
剤により共沈せしめる方法ある。In this new synthesis method, when synthesizing the raw material powder of Bi-Sr-Ca-Cu-0 based oxide superconductor, Bi acid component is dissolved in water as a water-soluble chelate compound, Sr, C
Dissolve each component of a and Cu? There is a method of co-precipitation with 8 p(l) using a precipitant.
本発明に於いては、Ｂｉ−３ｒ−Ｃａ−Ｃｕ−０系酸化
吻超電導体の原料粉末を所謂共沈法で合成するものであ
る。このようなＩｌｉ系酸化物超電導体の原料粉末を共
沈法で合成し得ること自体は、従来全くその報告を見な
い新規なことである。In the present invention, raw material powder for a Bi-3r-Ca-Cu-0 based oxidized superconductor is synthesized by a so-called coprecipitation method. The ability to synthesize raw material powder for such an Ili-based oxide superconductor by a coprecipitation method is itself a novelty that has not been previously reported.
而して本発明に於いては、原料粉末を共沈法で合成する
には、まず上記各金属成分を水に溶解する必要がある。Accordingly, in the present invention, in order to synthesize the raw material powder by the coprecipitation method, it is first necessary to dissolve each of the above-mentioned metal components in water.
上記金属のうちＢｉについては、硝酸塩や酸化物等の１
塩を使用すると、水により加水分解されて塩基性の塩を
生成して沈澱してしまい、安定な水溶液とはなり難い。Among the above metals, Bi has nitrates, oxides, etc.
If a salt is used, it will be hydrolyzed by water to produce a basic salt and precipitate, making it difficult to form a stable aqueous solution.
従ってＢｉについては、錯化合物を形成する錯形成剤を
使用して、Ｂｉ酸成分水溶性共沈化合物となして安定に
水中に溶存させるものであり、これが本発明の大きな特
徴の１つとなっている。そしてこの錯形成剤としては、
金属種を含まないものを使用することにより、水溶液と
してＢｉ酸成分存在させるものである。Therefore, Bi is stably dissolved in water as a water-soluble coprecipitated Bi acid component by using a complex forming agent that forms a complex compound, and this is one of the major features of the present invention. There is. As this complex forming agent,
By using a material that does not contain metal species, the Bi acid component is made to exist as an aqueous solution.
本発明に於ける第２の特徴としては、Ｂｉ酸成分水溶液
及びＳｒｓ Ｃａ及びＣｕの各成分の溶存している溶液
を共に沈澱剤を用いて沈澱さるに際し、沈澱剤を純水又
はアルコールに溶解せしめ、この沈澱剤溶液に上記各金
属成分が溶存する水溶液を添加し、て共沈反応を進行せ
しめることである。The second feature of the present invention is that when a Bi acid component aqueous solution and a solution containing dissolved Srs Ca and Cu components are precipitated using a precipitant, the precipitant is dissolved in pure water or alcohol. The first step is to add an aqueous solution in which each of the above-mentioned metal components is dissolved to this precipitant solution to allow a coprecipitation reaction to proceed.
旧成分は上記の通りキレート化して溶存せしめているた
めに、これにその他の金属成分の水溶液を加え沈澱剤を
含む溶液に添加すると、充分なる沈澱率でもって共沈せ
しめることが出来ない、たとえばＢｉの錯化剤としてグ
ルコン酸を使用する場合を例にとって説明すると、この
グルコン酸はＣａやＣｕとも同様にキレートを形成し、
水溶性キレートとして溶存するため充分なる共沈が期待
出来ないこととなる。即ち沈澱剤をキレートが溶存しな
い非水溶性の溶剤に溶解せしめて、上記水系に於けるＣ
ａやＣｕ＆錯化剤とのキレート化、惹いてはその溶存を
未然に防止して共沈率を向上せしめているものである。Since the old components are chelated and dissolved as described above, when an aqueous solution of other metal components is added to the solution containing the precipitant, coprecipitation cannot be achieved with a sufficient precipitation rate, for example. Taking the case of using gluconic acid as a complexing agent for Bi as an example, this gluconic acid also forms a chelate with Ca and Cu,
Since it is dissolved as a water-soluble chelate, sufficient coprecipitation cannot be expected. That is, by dissolving the precipitant in a water-insoluble solvent in which the chelate is not dissolved, the C in the aqueous system is reduced.
This improves the coprecipitation rate by preventing chelation with a, Cu, and the complexing agent, and thereby preventing their dissolution.
但し予め沈澱率を把握していれば沈澱剤の水溶液も使用
できる。However, an aqueous solution of a precipitant can also be used if the precipitation rate is known in advance.
本発明をその製法に従って順次説明する。The present invention will be sequentially explained according to its manufacturing method.
まず原料溶液を調製する。この原料溶液としては、Ｂｉ
、 ＳｒＳＣａｓ Ｃｕの各金属成分を溶存する溶液を
調製する。但し８１成分についてはすでに述べた通り加
水分解により沈澱するので、錯化剤を用いてキレート化
し、水溶性キレート化合物として水溶液に溶存せしめる
。First, a raw material solution is prepared. As this raw material solution, Bi
, prepare a solution in which each metal component of SrSCas Cu is dissolved. However, as mentioned above, component 81 is precipitated by hydrolysis, so it is chelated using a complexing agent and dissolved in an aqueous solution as a water-soluble chelate compound.
この際の錯化剤としては、水溶性キレート化合物を形成
し得るものが使用され、たとえばグルコン酸等の如き有
機酸、マンニット、ソルビット等の如き糖、アルコール
、フラクトース、キシロース等の単糖類、エチレンジア
ミンテトラ酢酸塩等の如きアミノポリカルボン酸及びそ
の塩基類、たとえばエチレンジアミンテトラ酢酸ニアン
モニウム等を具体的に挙げることが出来る。As complexing agents in this case, those capable of forming water-soluble chelate compounds are used, such as organic acids such as gluconic acid, sugars such as mannitol and sorbitol, alcohols, monosaccharides such as fructose and xylose, Specific examples include aminopolycarboxylic acids such as ethylenediaminetetraacetate and their bases, such as ammonium ethylenediaminetetraacetate.
この錯化剤を用いることにより、Ｂｉ酸成分してはその
硝酸塩や塩化物も使用出来、その他が使用出来る。゛
Ｂｉ基以外金属成分を溶存させるに際しては、これ等の
金属成分が溶存し得るような適宜な化合物を水に溶解せ
しめれば良く、たとえばＳｒ（ＮＯＪｔ、Ｃａ（ＮＯｓ
）ｔ ・４ＨｘＯ１Ｃｕ（ＮＯ＋）ｇ ・３１１ｔＯ等
をその代表例として例示できる。By using this complexing agent, nitrates and chlorides of Bi acid can be used as well as others.゛When dissolving metal components other than the Bi group, it is sufficient to dissolve an appropriate compound in water that can dissolve these metal components. For example, Sr(NOJt, Ca(NOs)
)t ・4HxO1Cu(NO+)g ・311tO, etc. can be exemplified as a representative example.
金属成分を溶存せしめる量は、共沈成分が所定の超電導
体を製造するに適した成分比となるように適宜に決定す
れば良い。The amount of dissolved metal component may be appropriately determined so that the coprecipitated component has a component ratio suitable for manufacturing a predetermined superconductor.
本発明に於いてはこれ等溶液を混合し、ついでこれを沈
澱剤を含む溶液に添加して上記４種金属成分を沈澱せし
める。この際、沈澱剤はすでに述べた通り、水溶性キレ
ートとして上記金属成分が溶存しないように、好ましく
は非水溶剤に溶解せしめた後添加する。この際の沈澱剤
としては、上記金属成分を共沈せしめ得るものであれば
広く各種のものが使用出来、たとえばシュウ酸、酒石酸
等のカルボン酸又はその塩等を例示出来、特に好ましい
ものとしてシュウ酸を挙げることが出来る。In the present invention, these solutions are mixed and then added to a solution containing a precipitant to precipitate the four metal components. At this time, as mentioned above, the precipitant is preferably added after being dissolved in a non-aqueous solvent so that the above-mentioned metal component does not dissolve as a water-soluble chelate. As the precipitant in this case, a wide variety of precipitants can be used as long as they can co-precipitate the above-mentioned metal components. Examples include carboxylic acids such as oxalic acid and tartaric acid, or salts thereof, and particularly preferred ones include oxalic acid and tartaric acid. Acids can be mentioned.
この沈澱剤を溶解せしめる溶媒としては、メチルアルコ
ール、エチルアルコール、イソプロピルアルコール等の
炭素数（１分子中）４以下の１価アルコールを例示出来
る。Examples of the solvent for dissolving the precipitant include monohydric alcohols having 4 or less carbon atoms (in one molecule) such as methyl alcohol, ethyl alcohol, and isopropyl alcohol.
共沈後、必要に応じてｐＨを４〜８程度に調整する。た
だし共沈前にρＩ＋を調整しても良い場合がある。この
ｐＨ調整により、結晶性の良好な沈澱物が得やすくなる
。After coprecipitation, the pH is adjusted to about 4 to 8, if necessary. However, it may be possible to adjust ρI+ before coprecipitation. This pH adjustment makes it easier to obtain a precipitate with good crystallinity.
かくして得られた沈澱は、次いで適宜な手段で濾過され
、乾燥されて原料粉末となる。尚本発明原料粉末は、そ
の後熱分解された後焼結され、超電導体の製造に供され
る。The precipitate thus obtained is then filtered by an appropriate means and dried to obtain a raw material powder. The raw material powder of the present invention is then thermally decomposed and then sintered to be used for manufacturing a superconductor.
以下に実施例を示して本発明の詳細な説明する。 The present invention will be described in detail below with reference to Examples.
実施例１
０．０１モルのＢｉ （ＮＯ３） ｙ・５＋１２０を０
．０５モルのグルコン酸を含む水溶液５０ｍ１に溶解す
る。Example 1 0.01 mol of Bi (NO3) y・5+120
．． Dissolve in 50 ml of an aqueous solution containing 0.5 mol of gluconic acid.
これを０．０１モルのＳｒ（ＮＯｓ）１０ 、 ０１モ
ルのＣａ（Ｎｏ、） ！ ’ ４１１＊Ｏ及び０．０２
モルのＣｕ（ＮＯｓ）ｚ ・３１ｈＯを含む溶液５０ｍ
ｊ！と混合して１００ｍ１とし、これを原液とした。This is combined with 0.01 mol of Sr(NOs)10 and 0.01 mol of Ca(No, )! '411*O and 0.02
50 ml of solution containing moles of Cu(NOs)z 31hO
j! This was mixed with 100 ml of liquid and used as a stock solution.
この原液を０．０７モルのシュウ酸を溶解したエタノー
ル４００ｏ１１に添加し共沈せしめた０次いでアンモニ
ア−エタノール溶液によりｐＨを７に調整後、吸引濾過
した。かくして得られた共沈粉末を８５０℃で仮焼し、
次いで８６０℃で焼結した。但しこの焼結では２０φ×
３１鰭のベレット状とした。This stock solution was added to ethanol 400o11 in which 0.07 mol of oxalic acid had been dissolved to cause coprecipitation.Then, the pH was adjusted to 7 with an ammonia-ethanol solution, and the mixture was suction-filtered. The coprecipitated powder thus obtained was calcined at 850°C,
It was then sintered at 860°C. However, in this sintering, 20φ×
It has a belet shape with 31 fins.
このペレットより試料を切取り、リード線を付けた後、
室温から７７Ｋまでの温度で４端子法により、電気抵抗
を測定し、超電導臨界温度（Ｔｃ）を求めた。その結果
、Ｔｃ（ｏｎ ５ｅｔ）は１２０に、Ｔｃ（ｏｆｆ ５
ｅｔ）は８５にであった。After cutting a sample from this pellet and attaching a lead wire,
Electrical resistance was measured by a four-probe method at temperatures from room temperature to 77 K, and the superconducting critical temperature (Tc) was determined. As a result, Tc(on 5et) is 120, Tc(off 5et) is 120, and Tc(off 5et) is 120.
et) was 85.
実施例２
［１ｉＣＩの０．０２モルを０．０３モルのエチレンジ
アミンテトラ酢酸ニアンモニウムを含む水溶液８０ｍＩ
Ｌに溶解する。Example 2 [1i 0.02 mol of CI was added to 80 ml of an aqueous solution containing 0.03 mol of ammonium ethylenediaminetetraacetate
Dissolves in L.
これを０．０２モルのＳｒＣｈ −０，０２モルのＣａ
Ｃ１ｇ及び０．０４モルのＣｕＣ１ｚを含む溶液８０Ｉ
ＩＩｌと混合して１６０１Ｉｌｌとし、これを原液とし
た。0.02 mol of SrCh - 0.02 mol of Ca
Solution 80I containing 1 g of C and 0.04 mol of CuC1z
This was mixed with 1601Ill and used as a stock solution.
この原液を０．０１２モルの酒石酸を溶解したイソプロ
ピルアルコール６００ｍｊ！に添加し共沈せしめ、つい
でｐＨを７に調整後、吸引濾過した。600 mj of isopropyl alcohol with 0.012 mol of tartaric acid dissolved in this stock solution! was added to cause coprecipitation, and the pH was then adjusted to 7, followed by suction filtration.
実施例１と同様にして仮焼し、焼結を行ない、（Ｔｃ）
を求めた。その結果、Ｔｃ（ｏｎ ５ｅｔ）は１１９Ｋ
ＳＴｃ（ｏｆｆ ５ｅｔ）は８３にであった。Calcination and sintering were performed in the same manner as in Example 1, and (Tc)
I asked for As a result, Tc (on 5et) is 119K
STc (off 5et) was 83.
本発明法は、超電導体、就中１１１ｉ−３ｒ−Ｃａ−Ｃ
ｏ−０系酸化物超電導体の原料粉末の新しい合成法を提
供するものであり、その産業上の利用効果は極めて大き
い。The method of the present invention is applicable to superconductors, especially 111i-3r-Ca-C.
This provides a new method for synthesizing raw material powder for o-0 type oxide superconductors, and its industrial application effects are extremely large.
（以上） 特許出願人 三菱電線工業株式会社(that's all) Patent applicant: Mitsubishi Cable Industries, Ltd.
Claims (1)
せしめ、Ｓｒ，Ｃａ及びＣｕの各成分の溶存する溶液と
共に沈澱剤により共沈せしめることを特徴とするＢｉ−
Ｓｒ−Ｃａ−Ｃｕ−Ｏ系酸化物超電導体の原料粉末の合
成法。(1) Bi-
A method for synthesizing raw material powder for Sr-Ca-Cu-O based oxide superconductor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63101901A JPH01275432A (en) | 1988-04-25 | 1988-04-25 | Synthetic method of raw material powder for oxide superconductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63101901A JPH01275432A (en) | 1988-04-25 | 1988-04-25 | Synthetic method of raw material powder for oxide superconductor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01275432A true JPH01275432A (en) | 1989-11-06 |
Family
ID=14312817
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63101901A Pending JPH01275432A (en) | 1988-04-25 | 1988-04-25 | Synthetic method of raw material powder for oxide superconductor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01275432A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104118909A (en) * | 2014-07-03 | 2014-10-29 | 昆明理工大学 | A preparing method of a Bi2Sr2CaCu2O3 superconductive nanometer material |
-
1988
- 1988-04-25 JP JP63101901A patent/JPH01275432A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104118909A (en) * | 2014-07-03 | 2014-10-29 | 昆明理工大学 | A preparing method of a Bi2Sr2CaCu2O3 superconductive nanometer material |
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