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Zn-, In- and Pb-added Ag-sheathed Sr1−xKxFe2As2 tapes were fabricated through the powder-in-tube method. All added tapes are found to have increased transport Jc at 4.2K in fields up to 14T than the pure samples. The best Jc result has been achieved in Zn-added tapes. Microstructure investigations reveal that Zn addition can improve both phase uniformity and grain connectivity of Sr1−xKxFe2As2, thus...
The microstructure and electrical properties of the ZPCMY varistor ceramics composed of ZnO–Pr 6 O 11 –Co 3 O 4 –MnCO 3 –Y 2 O 3 systems sintered at temperature of 1200–1300°C were investigated. The addition of Y 2 O 3 led to the decrease of the densification and the slight improvement of the electrical properties. The varistor...
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