caa a22 4500 388020040 CHVBK 20180307124921.0 cr unu---uuuuu 161130e199804 xx s 000 0 eng 10.1557/JMR.1998.0103 doi S0884291400043405 pii (NATIONALLICENCE)cambridge-10.1557/JMR.1998.0103 Soft chemical preparation and electrochemical oxygen doping of La2Can−1CunO2n+2 [Elektronische Daten] La2CaCu2O6 (n = 2) was obtained at temperatures as low as 800 °C by firing the coprecipitates from a mixed aqueous solution of La, Ca, and Cu acetates which were titrated with tartaric acid. The firing temperature was much lower than that in solid state reactions which are usually conducted above 1000 °C. Both La2Ca2Cu3O8 (n = 3) and La2Ca3Cu4O10 (n = 4) were obtained at 700 °C in a similar preparation method. Low temperature firing was very important for these preparations. A porous sintered body of La2CaCu2O6 with a relative density of about 15% was also obtained using this preparation method. This porous sintered body could be effectively oxygen-doped by electrochemical oxidation showing the presence of a new superconducting phase with Tc around 30 K. Copyright © Materials Research Society 1998 Kikkawa Shinichi ISIR, Osaka University, Ibaraki, Osaka 567, Japan Taya Noriko ISIR, Osaka University, Ibaraki, Osaka 567, Japan Kanamaru Fumikazu ISIR, Osaka University, Ibaraki, Osaka 567, Japan Journal of Materials Research Cambridge University Press 13/4(1998-04), 812-815 0884-2914 13:4<812 1998 13 JMR https://doi.org/10.1557/JMR.1998.0103 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1557/JMR.1998.0103 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Kikkawa Shinichi ISIR, Osaka University, Ibaraki, Osaka 567, Japan NATIONALLICENCE 700 1- Taya Noriko ISIR, Osaka University, Ibaraki, Osaka 567, Japan NATIONALLICENCE 700 1- Kanamaru Fumikazu ISIR, Osaka University, Ibaraki, Osaka 567, Japan NATIONALLICENCE 773 0- Journal of Materials Research Cambridge University Press 13/4(1998-04), 812-815 0884-2914 13:4<812 1998 13 JMR CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge