ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Carefully prepared and well-characterized Bi1.7Pb0.3 Sr2Ca2Cu3Ox samples were studied by means of differential scanning calorimetry, thermogravimetry, and room and high temperature x-ray diffraction in different atmospheres. It is found that the decomposition of Bi1.7Pb0.3Sr2Ca2Cu3Ox strongly depends on the given conditions. In argon atmosphere, the sample begins to decompose at 850 °C, and finally decomposes mainly into Bi2Sr2CuOx, Cu2O, CaO, and (Sr,Ca)2O3; in air, it decomposes at 880 °C, into Bi2Sr2CuOx, Bi2Sr2CaCu2Ox, Bi1.7Pb0.3Sr2Ca2Cu3Ox, and (Sr,Ca)O; in oxygen, it decomposes at 900 °C, into Bi2Sr2CuOx, Bi2Sr2CaCu2Ox, Bi1.7Pb0.3Sr2Ca2Cu3Ox, and (Sr,Ca)2O3. The process of the melting was in situ studied by high temperature x-ray diffraction and a quenching method. This study gives some hints for growing single crystals of Bi1.7Pb0.3Sr2Ca2Cu3Ox and how to introduce pinning centers into Bi2Sr2CaCu2Ox and Bi1.7Pb0.3Sr2Ca2Cu3Ox. © 1995 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.358609
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