The BG News October 18, 2007

The BGSU campus student newspaper October 18, 2007. Volume 98 - Issue 42https://scholarworks.bgsu.edu/bg-news/8818/thumbnail.jp

Spartan Daily, May 15, 1995

Volume 104, Issue 69https://scholarworks.sjsu.edu/spartandaily/8713/thumbnail.jp

Spartan Daily, November 2, 1951

Volume 40, Issue 28https://scholarworks.sjsu.edu/spartandaily/11615/thumbnail.jp

Spartan Daily, November 2, 1951

Volume 40, Issue 28https://scholarworks.sjsu.edu/spartandaily/11615/thumbnail.jp

The BG News October 25, 2007

The BGSU campus student newspaper October 25, 2007. Volume 98 - Issue 47https://scholarworks.bgsu.edu/bg-news/8823/thumbnail.jp

NASA Tech Briefs, January 1999

Topics include: special coverage sections on sensors and data acquisition and sections on electronic components and circuits, electronic software, materials, mechanics, bio-medical physical sciences, book and reports, and a special section of Photonics Tech Briefs

Chemical spray pyrolysis of Tl-Ba-Ca-Cu-O high-T(sub c) superconductors for high-field bitter magnets

The deposition of Tl-Ba-Ca-Cu-O thick films by spray pyrolyzing a Ba-Ca-Cu-O precursor film and diffusing thallium into the film to form the superconducting phase is examined. This approach was taken to reduce exposure to thallium and its health and safety hazards. The Tl-Ba-Ca-Cu-O system was selected because it has very attractive features which make it appealing to device and manufacturing engineering. Tl-Ba-Ca-Cu-O will accommodate a number of superconducting phases. This attribute makes it very forgiving to stoichiometric fluctuations in the bulk and film. It has excellent thermal and chemical stability, and appears to be relatively insensitive to chemical impurities. Oxygen is tightly bound into the systems, consequently there is no orthorhombic (conductor) to tetragonal (insulator) transition which would affect a component's lifetime. More significantly, the thallium based superconductors appear to have harder magnetic properties than the other high-Tc oxide ceramics. Estimates using magnetoresistance measurements indicate that at 77 K Tl2Ba2CaCu2O10 will have an upper critical field, H(sub c2) fo 26 Tesla for applied fields parallel to the c-axis and approximately 1000 Tesla for fields oriented in the a-b plane. Results to date have shown that superconducting films can be reproducibly deposited on 100 oriented MgO substrates. One film had a zero resistance temperature of 111.5 K. Furthermore, x ray diffraction analysis of the films showed preferential c-axis orientation parallel to the plane of the substrate. These results have now made it possible to consider the manufacture of a superconducting tape wire which can be configured into a topology useful for high-field magnet designs. The research which leads to the preparation of these films and plans for further development are reviewed