Title :
Thick film resistor fabricated with YBa2Cu3O 7-x superconducting powder
Author :
Fu Shen-Li ; Hsieh, Yu-Hung
Author_Institution :
Dept. of Electr. Eng., Nat. Cheng Kung Univ., Tainan, Taiwan
fDate :
9/1/1991 12:00:00 AM
Abstract :
Thick-film resistor paste was prepared utilizing the characteristics of low resistivity and small positive temperature coefficient of resistivity (TCR) around the room temperature of the YBa 2Cu3O7-x (YBCO) superconductor. PbO or PbO2, together with Ag2O, were added to densify the fired film and to achieve adequate resistivity values for practical applications. By adjusting the contents of Ag2 O and PbO or PbO2 in the YBCO, sheet resistivities ranging from a few ohms per square to several megaohms per square were obtained. Adding PbO2 is superior to PbO, because using PbO 2 makes material preparation easier, allowing for a smaller negative TCR (even though TCR values are still higher than expected). The relationships between the TCR of the fabricated resistors and individual TCRs of YBa2Cu3O7-x, Ag2O, and PbO were studied
Keywords :
barium compounds; lead compounds; materials testing; silver compounds; thick film resistors; yttrium compounds; TCR; YBa2Cu3O7-x-PbO-Ag2O; YBa2Cu3O7-x-PbO2-Ag 2O; material preparation; resistivity; room temperature operation; sheet resistivities; temperature coefficient of resistivity; Conductivity; Glass; High temperature superconductors; Lead; Powders; Resistors; Superconducting films; Superconducting transition temperature; Thick films; Yttrium barium copper oxide;
Journal_Title :
Components, Hybrids, and Manufacturing Technology, IEEE Transactions on
