JP2757876B2 - Ca <bottom 0>. Bottom 8 Bottom 6 Sr Bottom 0 Bottom 1 Bottom 4 Single phase ceramics of CuO Bottom 2 - Google Patents
Ca <bottom 0>. Bottom 8 Bottom 6 Sr Bottom 0 Bottom 1 Bottom 4 Single phase ceramics of CuO Bottom 2Info
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- JP2757876B2 JP2757876B2 JP1240141A JP24014189A JP2757876B2 JP 2757876 B2 JP2757876 B2 JP 2757876B2 JP 1240141 A JP1240141 A JP 1240141A JP 24014189 A JP24014189 A JP 24014189A JP 2757876 B2 JP2757876 B2 JP 2757876B2
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- cuo
- single phase
- ceramics
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Description
【発明の詳細な説明】 〔概 要〕 Ca0.86Sr0.14CuO2の単相セラミックスおよびその製法
に関し、 センサーとしておよび金属的な電気伝導性を示す酸化
物セラミックスとして利用可能なCa0.86Sr0.14CuO2の単
相セラミックスを合成することを目的とし、Ca:Sr:Cuの
割合が0.86:0.14:1であるCaCO3,SrCO3及びCuOの各粉末
を混合し、得られた混合物を950〜970℃で焼成するよう
に構成する。DETAILED DESCRIPTION OF THE INVENTION [Overview] Ca 0.86 Sr 0.14 CuO 2 Single phase ceramics of Ca 0.86 Sr 0.14 CuO 2 and its production method, Ca 0.86 Sr 0.14 CuO 2 usable as a sensor and as an oxide ceramic showing metallic electrical conductivity For the purpose of synthesizing single-phase ceramics, Ca: Sr: Cu ratio of 0.86: 0.14: 1 is mixed with each powder of CaCO 3 , SrCO 3 and CuO, and the obtained mixture is heated at 950 to 970 ° C. Is configured to be fired.
本発明は、Ca0.86Sr0.14CuO2の単相セラミックスおよ
びその製法に関する。The present invention relates to a single-phase ceramic of Ca 0.86 Sr 0.14 CuO 2 and a method for producing the same.
近年、セラミックスの種々の秀れた性質、例えばその
機械的性質、化学的性質、電気的性質および光学的性質
等を利用したファインセラミックスの基礎的研究および
その応用面での研究開発が進められている。In recent years, basic research on fine ceramics utilizing various excellent properties of ceramics, such as mechanical properties, chemical properties, electrical properties, optical properties, etc., and research and development on its application have been advanced. I have.
特に、極く近年より酸化的高温超伝導体セラミックス
に関する研究が急速にかつ精力的になされてきている。
ところで、超電導体として開発当初Ba−Ｙ−Cu−Ｏ系等
が基本的なものとして研究されていたが、その後より高
温の超電導体を求めて新規物質の合成が続けられてい
る。In particular, research on oxidative high-temperature superconductor ceramics has been rapidly and vigorously made in recent years.
By the way, Ba-Y-Cu-O based superconductors and the like have been studied as basic superconductors at the beginning of development, but thereafter, synthesis of new substances has been continued in search of superconductors of higher temperature.
ところでCa0.86Sr0.14CuO2の単結晶の作成とその構造
解析に関する報告があった（Nature vol.334,7月21日,1
988）。By the way, there was a report on the preparation of Ca 0.86 Sr 0.14 CuO 2 single crystal and its structural analysis (Nature vol. 334, July 21, 1
988).
しかし、上記酸化物については単一相からなるセラミ
ックスについては文献未記載であり、今日まで得られて
いない。However, regarding the above oxides, ceramics composed of a single phase have not been described in the literature, and have not been obtained to date.
本発明者らは、上記Ca−Sr−Cu−Ｏ系の単相セラミッ
クスを得る目的で鋭意研究を重ねた結果、以下に述べる
ような方法を採用することによりその合成に成功したの
である。The present inventors have conducted intensive studies for the purpose of obtaining the Ca-Sr-Cu-O-based single-phase ceramics, and as a result, have succeeded in synthesizing the same by employing the method described below.
すなわち、本発明の新規なCa0.86Sr0.14CuO2の単相セ
ラミックスは、Ca:Sr:Cuの割合が0.86:0.14:1であるCaC
O3,SrCO3およびCuOの各粉末を混合し、得られた混合物
を950〜970℃の焼成温度条件で焼成することにより好都
合に得ることが可能である。That is, the novel Ca 0.86 Sr 0.14 CuO 2 single-phase ceramic of the present invention, Ca: Sr: Cu ratio of 0.86: 0.14: 1 CaC
O 3 , SrCO 3 and CuO can be conveniently obtained by mixing the powders and sintering the resulting mixture at a firing temperature of 950 to 970 ° C.
すなわち、本発明方法は、Ca,Sr,Cuの炭酸物又は酸化
物を目的とする組成比となるように秤量し、混合し、固
相反応法によって酸化物セラミックスを合成するもので
あるが、その際最適な焼成温度を採択することによって
単相セラミックスを得ることができたものである。That is, the method of the present invention is a method in which Ca, Sr, and carbonate or oxide of Cu are weighed so as to have a target composition ratio, mixed, and synthesized as oxide ceramics by a solid-phase reaction method. At that time, by adopting the optimum firing temperature, a single-phase ceramic could be obtained.
また、得られたセラミックスは、例えば半導体として
利用可能性が考えられる。更にまた、セラミックセンサ
ーとして利用が考えられる。Further, the obtained ceramics may be used, for example, as a semiconductor. Furthermore, use as a ceramic sensor is conceivable.
以下、更に実施例により本発明を説明する。 Hereinafter, the present invention will be described with reference to examples.
実施例1. 出発原料として、CaCO3,SrCO3、およびCuOの各粉末を
用いた。各粉末をCa:Sr:Cu＝0.86:0.14:1となるように
秤量した（すなわち、CaCO3 9.24095g,SrCO3 2.21886,C
uO 8.54019g）。メノウ乳鉢で混合後、粉末の状態で800
℃、５時間仮焼成を行った。Example 1. Powders of CaCO 3 , SrCO 3 , and CuO were used as starting materials. Each powder was weighed so that Ca: Sr: Cu = 0.86: 0.14: 1 (that is, 9.24095 g of CaCO 3 , SrCO 3 2.21886, C
uO 8.54019g). After mixing in an agate mortar, 800
Temporary baking was performed at 5 ° C. for 5 hours.
次いで、仮焼した粉末を200MPaで圧粉後、964℃で６
時間焼成した。焼成はいずれも大気中で行った。焼成し
て得られた試料をＸ線回折装置（ソガク社製）を用い
て、測定したそのＸ線回折パターンを第１図に示す。第
１図に示されられる回折パターンより964℃で焼成して
得られた試料は、Ca0.86Sr0.14CuO2の単相セラミックス
であることが判明した。最小二乗法によって、格子定数
を決めた結果、ａ＝3.86Å,c＝3.21Åであることがわか
った。第１表に２θの実験値、計算値、およびその差を
示す。Next, the calcined powder was compacted at 200 MPa,
Fired for hours. All firings were performed in the air. FIG. 1 shows an X-ray diffraction pattern of the sample obtained by baking, measured using an X-ray diffractometer (manufactured by Sogaku). From the diffraction pattern shown in FIG. 1, it was found that the sample obtained by firing at 964 ° C. was a single phase ceramic of Ca 0.86 Sr 0.14 CuO 2 . As a result of determining the lattice constant by the least square method, it was found that a = 3.86 ° and c = 3.21 °. Table 1 shows the experimental values and calculated values of 2θ, and the differences therebetween.
実施例2. 実施例１と同様の方法で酸化物セラミックスを合成し
た。但し、仮焼成温度は805℃であり、本焼成温度は968
℃であった。得られたセラミックスの試料のＸ線回折パ
ターンを第２図に示す。このパターンより試料は実施例
１と同様のCa0.86Sr0.14CuO2の単相セラミックスである
ことが判明した。 Example 2 An oxide ceramic was synthesized in the same manner as in Example 1. However, the preliminary firing temperature was 805 ° C, and the final firing temperature was 968
° C. FIG. 2 shows an X-ray diffraction pattern of the obtained ceramic sample. From this pattern, it was found that the sample was the same single-phase Ca 0.86 Sr 0.14 CuO 2 ceramic as in Example 1.
実施例3. 実施例１と同様の方法で酸化物セラミックスを合成し
た。但し、仮焼成温度は805℃であり、本焼成温度は960
℃であった。得られたセラミックスの試料のＸ線回折パ
ターンを第３図に同様のCa0.86Sr0.14CuO2の単相セラミ
ックスであることが判明した。Example 3 An oxide ceramic was synthesized in the same manner as in Example 1. However, the preliminary firing temperature is 805 ° C, and the final firing temperature is 960 ° C.
° C. The X-ray diffraction pattern of the obtained ceramic sample is shown in FIG. 3 to be the same single phase ceramic of Ca 0.86 Sr 0.14 CuO 2 .
比較例 本発明方法における温度範囲外（976℃および989゜）
で焼成する比較実験を行った。Comparative Example Out of the temperature range in the method of the present invention (976 ° C and 989 ° C)
A comparative experiment in which firing was performed was performed.
用いた出発原料およびその割合は実施例１と同じであ
る。The starting materials used and their proportions are the same as in Example 1.
焼成温度976゜および989゜の場合の粉末Ｘ線回折パタ
ーンをそれぞれ第４図および第５図に示す。The powder X-ray diffraction patterns at the firing temperatures of 976 ° and 989 ° are shown in FIGS. 4 and 5, respectively.
第４図および第５図から明らかなようにこれらの温度
の場合は、部分溶融した形跡があり、Ca2CuO3型と（Ca
0.86Sr0.14）CuO2の混相になった。As is clear from FIGS. 4 and 5, at these temperatures, there was a trace of partial melting, and Ca 2 CuO 3 type and (Ca
0.86 Sr 0.14 ) A mixed phase of CuO 2 was formed.
本発明は、以上説明したように一定の温度範囲下で原
料粉末を焼成するように構成したものであるから、（Ca
0.86Sr0.14）CuO2の単一相からなるセラミックスを合成
することが可能となる。Since the present invention is configured to calcine the raw material powder under a certain temperature range as described above, (Ca
0.86 Sr 0.14 ) Ceramics consisting of a single phase of CuO 2 can be synthesized.
第１図は、Ca0.86Sr0.14CuO2において、焼成温度964℃
の場合の粉末Ｘ線回折パターンを示すグラフであり、 第２図は、同様に焼成温度968℃の場合の粉末Ｘ線回折
パターンを示すグラフであり、 第３図は、同様に焼成温度960゜の場合の粉末Ｘ線回折
パターンを示すグラフであり、 第４図は、焼成温度976℃の場合の粉末Ｘ線回折パター
ンを示すグラフであり、 第５図は、焼成温度989℃の場合の粉末Ｘ線回折パター
ンを示すグラフである。Fig. 1 shows the firing temperature of 964 ° C for Ca 0.86 Sr 0.14 CuO 2
FIG. 2 is a graph showing a powder X-ray diffraction pattern when the firing temperature is 968 ° C. Similarly, FIG. 3 is a graph showing a powder X-ray diffraction pattern when the firing temperature is 968 ° C. FIG. 4 is a graph showing a powder X-ray diffraction pattern at a baking temperature of 976 ° C. FIG. 5 is a graph showing a powder X-ray diffraction pattern at a baking temperature of 976 ° C. It is a graph which shows an X-ray diffraction pattern.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 丹羽 紘一 神奈川県川崎市中原区上小田中1015番地 富士通株式会社内 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Koichi Niwa 1015 Kamiodanaka, Nakahara-ku, Kawasaki City, Kanagawa Prefecture Inside Fujitsu Limited
Claims (2)
O3,SrCO3およびCuOの各粉末を混合し、得られた混合物
を950℃〜970℃の温度で焼成することを特徴とする、Ca
0.86Sr0.14CuO2単相セラミックスの製造方法。2. A CaC having a Ca: Sr: Cu ratio of 0.86: 0.14: 1.
Ca, characterized by mixing each powder of O 3 , SrCO 3 and CuO and firing the resulting mixture at a temperature of 950 ° C. to 970 ° C.
0.86 Sr 0.14 CuO 2 Single phase ceramics production method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1240141A JP2757876B2 (en) | 1989-09-18 | 1989-09-18 | Ca <bottom 0>. Bottom 8 Bottom 6 Sr Bottom 0 Bottom 1 Bottom 4 Single phase ceramics of CuO Bottom 2 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1240141A JP2757876B2 (en) | 1989-09-18 | 1989-09-18 | Ca <bottom 0>. Bottom 8 Bottom 6 Sr Bottom 0 Bottom 1 Bottom 4 Single phase ceramics of CuO Bottom 2 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03103350A JPH03103350A (en) | 1991-04-30 |
| JP2757876B2 true JP2757876B2 (en) | 1998-05-25 |
Family
ID=17055105
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1240141A Expired - Lifetime JP2757876B2 (en) | 1989-09-18 | 1989-09-18 | Ca <bottom 0>. Bottom 8 Bottom 6 Sr Bottom 0 Bottom 1 Bottom 4 Single phase ceramics of CuO Bottom 2 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2757876B2 (en) |
-
1989
- 1989-09-18 JP JP1240141A patent/JP2757876B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03103350A (en) | 1991-04-30 |
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