Abstract
Preparation and measurements of electrical and structural properties of HTSC thick films were carried out. Chemical reactions between different polycrystaline substrates and YBCO powder and thick films were studied as well. The influence of addition of silver oxide powder to the paste was investigated. The respective pastes were prepared and screen-printed on substrates then dried and subsequently fired. The best compatability with YBCO as to chemical reactivity and the coefficient of the thermal dilatation was observed for Y 2BaCuO 5 and MgO substrates, respectively. The best films were found to exhibit zero resistivity at 88 K when deposited on MgO. The addition of silver oxide powder to the pastes enhenced the critical temperature and the critical current density.
Published Version
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