Development of functional devices using hot spot in GdBa2Cu3O7−δ-based composite ceramics

Okamoto, Takuya; Takata, Masasuke

doi:10.1016/j.ceramint.2003.12.100

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“…The potential application of GdBa 2 Cu 3 O 7-␦ (Gd123) ceramics utilizing hot spots as oxygen sensing elements was proposed quite recently [1,2]. Their suggestion follows earlier observations of formation of oxygen-sensitive hot-spots in RE123 (RE = Gd and Sm) ceramic rods [3].…”

Section: Introductionmentioning

confidence: 92%

“…Oxygen absorption produces significant change in conductivity which was used for proposes of oxygen detection [3]. However, being a positive temperature coefficient of resistivity (PTCR)-based material, not only resistivity of the RE123 ceramic rod but also those of the hot spot are expected to increase with temperature [1]. In addition, oxygen absorption at the hot-spot area is also expected to be influenced by temperature as previous reports on resistivity [12] and thermogavimetry measurements [13] on hotspot free Y123 reported strong influence of temperature on oxygen absorption and desorption rates.…”

Section: Introductionmentioning

confidence: 99%

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