Comparison of the behavior of the three superconductors YBCO, Bi-2212 and MgB2 in different environmental conditions

Transformation of MgB2 powder into superconducting film via electrophoretic deposition technique

“…Thus the slot between 550 and 700 • C is considered for the further optimization of heat treatment temperature of the films in excess magnesium powder. This is in accordance to studies by Ochsenkühn-Petropoulou et al [21] who reported that sintering temperature of the coatings should below 800 • C.…”

“…Thick films have great potential applications in magnetic shielding and high power antenna [6]. In recent years different techniques, such as screening printing [2,7], sol-gel [8], solution spray [9], partial melting technique [10], electrocrystallization [11][12][13], and electrophoretic deposition (EPD) have been used for the fabrication of thick films of MgB 2 [14][15][16][17][18][19] and high-T c superconductors [20,21]. The electrophoretic deposition is a very simple and rapid technique, which enables single or double-sided coatings on desired substrates with any shape.…”

Overall design of a 5 MW/10 MJ hybrid high-temperature superconducting energy storage magnets cooled by liquid hydrogen

“…At present, HTS materials with practical value for SMES mainly include MgB 2 , Bi series (Bi-2223 and Bi-2212) and YBCO, among which Bi-2212 superconductor has relatively low current carrying capacity at 20 K [11,12]. YBCO coated conductors offer high in-field performance and their cost is expected to reduce substantially in the near future [13].…”

Visualisation of environmental degradation in ceramic superconductors using digital speckle photography

“…It is well known that YBa 2 Cu 3 O 7−δ (YBCO) compounds are more sensible to deterioration in diverse environmental conditions than Bi 2 Sr 2 CaCu 2 O 8+δ (Bi-2212) ones. 1 In the Bi-2212 materials the general degradation mechanism is 2,3 : Initially, calcium carbonate becomes the predominant compound formed during degradation process. In a second stage, the strontium carbonate forms faster in a larger amount.…”