PENGARUH DOPAN Pb DAN Sb TERHADAP ENERGI AKTIVASI SUPERKONDUKTOR BSCCO-2212

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PENGARUH DOPAN Pb DAN Sb TERHADAP ENERGI AKTIFASI SUPERKONDUKTOR BSCCO-2212. Telah dilakukan penelitian pengaruh dopan Pb dan Sb terhadap energy aktifasi superkonduktor BSCCO-2212. Garam-garam nitrat dari Bismuth, Stronsium, Calsium, dan Copper dicampur pada perbandingan stoikiometri Bi:Sr:Ca:Cu = 2:2:1:2. Campuran dilarutkan dalam garam cair urea dengan pemanasan dan pengadukan pada temperatur 120^oC selama 16 jam, kemudian dipirolisis . Hasil pirolisis digerus, dikalsinasi dan disinter dengan temperatur 845 ^oC selama 10 jam, sintesa diulang dengan penambahan dopan Pb, Sb, dan Pb+Sb dengan fraksi dopan 0,1 terhadap Bi. Hasil sintering diuji efek meissner, mikroskop optik, difraksi sinar-X, dan LCR meter. Pengujian menyimpulkan bahwa terbentuk superkonduktor BSCCO-2212. Penambahan dopan Pb menjadikan konduktifitas tertinggi 9,37x10^-3 S/cm dan energi aktifasi terendah sebesar 3197,68 eV pada rentang temperatur 80-240 K.

Kata kunci : dopan, energi aktivasi, superkonduktor BSCCO-2212

INFLUENCE OF Pb AND Sb OF BSCC0-2212 SUPERCONDUCTOR CONDUCTIVITY AND ENERGY ACTIVATION. The influence of Pb and Sb dopan of BSCCO-2212 superconductor conductivity and activation energy have been done. Nitrate salts of bismuth, strontium, calcium, and copper stochiometry were mixed in the ratio Bi:Sr:Ca:Cu=2:2:1:2. Mixture were dissolved in a molten salt of urea with heating and stirring at a temperature of 120^oC for 16 hours. The pyrolysis were pulverized, calcined, and sintered at themperature of 845 ^oC for 10 hours, the syntesed was repeated with the addition of Pb, Sb, and Pb+Sb. Dopan with 0.1 dopan fraction of Bi. Sintering result was tested with meissner effect, optical microscopy, X-ray diffraction, and LCR-meters. It is concluded that the formed superconductor BSCCO-2212. Addition of Pb dopan result in a highest conductivity of 9,37x10^-3 S/cm and the lowest activation energy of 3197.68 eV in the temperature range 80-240 K.

Key words : dopan, activation energy, BSCCO-2212 superconductor