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Journal of the Korean Chemical Society (JKCS)

ISSN 1017-2548(Print)
ISSN 2234-8530(Online)
Volume 34, Number 6
JKCSEZ 34(6)
December 20, 1990 

 
Title
Fabrication of YBaCuO Superconducting Films by Aerosol Spray

Aerosol Spray 에 의한 YBaCuO 초전도 필름의 제조
Author
Myungah Song, Min Young Youn, Yunsoo Kim

송명아, 윤민영, 김윤수
Keywords
Abstract
YBa2Cu3O7-x 초전도 필름을 초음파에 의한 aerosol spray 법을 이용하여 YSZ (yttria stabilized zirconia) 및 SrTiO3의 (100) 결정면 위에 만들었다. 초전도상은 세 단계의 과정을 거쳐서 형성되었다 : (가) 이트륨, 바륨, 구리의 질산염을 화학 양론비로 섞어 만든 용액을 250℃로 가열된 기질에 분무하여, (나) 형성된 필름을 공기 중에서 550℃로 예열하고, (다) 흐르는 산소 분위기에서 950℃로 소결한 뒤 노냉하였다. 필름의 저하을 dc four-point probe 법으로 측정하여 액체질소 온도 이상에서 초전도성을 확인하였다.

High temperature superconducting films of YBa2Cu3O7-x were fabricated on the (100) single crystal faces of YSZ (yttria stabilized zirconia) and SrTiO3 by aerosol spray using ultrasonic atomization. The superconducting phase was formed by a three-step process: (a) spraying of a stoichiometric solution of nitrates of yttrium, barium, and copper on heated substrates kept at 250℃, (b) preheating of the sprayed films in air at 550℃, and (e) sintering of the films in flowing oxygen at 950℃, followed by furnace cooling. Resistances of the films were measured by the dc four-probe method and superconductivity was confirmed above the liquid nitrogen temperature.

Page
555 - 560
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