Synthesis and characterization of high temperature compatible ZrO2 insulation coatings on Ag/AgMg sheathed Bi-2212 wires and tapes
Surface and Coatings Technology, cilt.161, sa.2-3, ss.179-187, 2002 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 161 Sayı: 2-3
- Basım Tarihi: 2002
- Doi Numarası: 10.1016/s0257-8972(02)00475-9
- Dergi Adı: Surface and Coatings Technology
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
- Sayfa Sayıları: ss.179-187
- Anahtar Kelimeler: Adhesive strength, HTS conductor, Insulation, Self-insulating substrate tapes, Sol-gel, ZrO2
- Ankara Yıldırım Beyazıt Üniversitesi Adresli: Hayır
Özet
High temperature compatible ZrO2 insulation coatings have been successfully fabricated on Ag and AgMg sheathed Bi2Sr2Ca1Cu2Ox (Bi-2212) superconducting wires and tapes for high magnetic field magnets. Solutions were prepared from a zirconium based organometallic compound, solvent and chelating agent. The ZrO2 was coated on Ag and AgMg sheathed Bi-2212 wires and tapes at 500 °C for 2 min in air using a reel-to-reel, continuous sol-gel technique and these tapes were subsequently annealed at ∼ 860 °C in a flowing oxygen atmosphere. The relationship between the solutions and the coatings was evaluated. With reference to environment scanning electron microscope, energy dispersive spectroscopy, differential thermal analysis, thermogravimetric and X-ray diffraction studies, different steps in the process leading to the formation of ZrO2 are discussed. These studies indicate that the formation of cubic ZrO2 starts at approximately 450-550 °C and thin film thickness increases with number of dipping operations. The average adhesive strength of ZrO2 was found to be 0.763 MPa. © 2002 Elsevier Science B.V. All rights reserved.