High-efficiency preparation of high-quality YBCO superconducting films using an ultralow-fluorine sol–gel method

Chen, Yuanqing; Yin, Xiaoru; Yi, Fengyan; Bian, Wei; Li, Mengjuan; Niu, Jinfen

doi:10.1007/s10971-014-3606-z

Cited by 11 publications

(4 citation statements)

References 15 publications

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“…Recently, Chen et al used yttrium TFA, barium acetate and copper acetate as precursors with the help of lactic acid or methacrylic acid to prepare a low fluorine solution with a fluorine content of 23.1% [15]. Subsequently, they synthesized an ultralow fluorine solution to fabricate YBCO film with high performance [16]. A very low fluorine solution with a fluorine content of 10.3% was also reported by Wu et al [17].…”

Section: Introductionmentioning

confidence: 95%

Optimization of fluorine content in TFA-MOD precursor solutions for YBCO film growth

Jin

Feng

et al. 2015

Supercond. Sci. Technol.

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Several low fluorine solutions containing different contents of fluorine were prepared by a chemical process. The fluorine contents in these solutions with respect to the conventional all-trifluoroacetate solution were calculated as 0%, 7.7%, 15.4%, 23.1%, 30.8%, 38.5% and 53.8%. YBa2Cu3O7−x (YBCO) films were deposited on LaAlO3 and CeO2/MgO/Al2O3/Hastelloy substrates using these low fluorine solutions. The phase formation, texture and microstructure of the YBCO films were characterized by x-ray diffraction and scanning electron microscopy. The decomposition mechanism of the low fluorine solution was also discussed. The results indicate that the ratio of F/Ba and the carbon content in decomposed powders could be controlled by adjusting the fluorine content in the precursor solutions. Fluorine had a great influence on the phase transformation, nucleation and growth of YBCO film during the crystallization process. The optimization of fluorine content was in the range of 15.4%–23.1%, which contributed to the good texture, homogeneous microstructure and high Jc value of the YBCO crystallized films.

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Section: Introductionmentioning

confidence: 95%

Optimization of fluorine content in TFA-MOD precursor solutions for YBCO film growth

Jin

Feng

et al. 2015

Supercond. Sci. Technol.

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“…The solution preparation process of the YBCO solution has been reported elsewhere [11]. The YBCO gel films were coated on the CeO 2 /LZO buffered NiW tapes.…”

Section: Methodsmentioning

confidence: 99%

Chemical Solution Deposition of Epitaxial YBa2Cu3O7-x /CeO2/ La2Zr2O7 Multilayer Films on Biaxially-Textured Ni-W Tapes

Li¹

2017

IJMSA

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CeO 2 /La 2 Zr 2 O 7 composite buffer layers were deposited on Ni-W tapes using chemical solution method.YBa 2 Cu 3 O 7-x (YBCO) films were then deposited on the CeO 2 /La 2 Zr 2 O 7 composite buffer layers using a low-fluorine solution route. Effect of the annealing temperature and annealing atmosphere on the texture of the CeO 2 layers was investigated. It was found that CeO 2 film annealed at 1000°C under the atmosphere of N 2 containing of 5vol. %H 2 shows a high degree of c-orientation on La 2 Zr 2 O 7 (LZO) film. Effect of oxygen partial pressure on the properties of YBCO films deposited on the CeO 2 /LZO buffer layers was also investigated. The YBCO annealed under N 2 containing of 500ppm O 2 shows the optimal properties, with critical current density (J c ) of 1MA/cm 2 at 77K, 0T.

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“…The La 2 Zr 2 O 7 (LZO) precursor solution with cation concentration of 0.3 mol/L was prepared by dissolving the lanthanum acetate, zirconium acetylacetonate in the mixture solution of propionic acid and methanol. The precursor YBCO solution with a mole ratio of F/Ba = 2 was synthesized according to the route we reported elsewhere [23,24].…”

Section: Methodsmentioning

confidence: 99%

Sol–gel deposition of high-performance Re0.2Ce0.8O2/La2Zr2O7 composite buffer layers on Ni–W tapes for YBCO coated conductors

Bian

Chen

Tang

et al. 2015

J Sol-Gel Sci Technol

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Gd-, Y-, and La-doped CeO 2 films (Gd 0.2-Ce 0.8 O 2 , Y 0.2 Ce 0.8 O 2 , and La 0.2 Ce 0.8 O 2 ) are prepared on Ni-W tapes and La 2 Zr 2 O 7 -buffered Ni-W tapes using solgel method. The films are characterized by X-ray diffraction and atomic force microscopy. Results indicate that Y 0.2 Ce 0.8 O 2 (YCO) film shows the better crystallinity and the surface quality compared with Gd 0.2 Ce 0.8 O 2 (GCO) and La 0.2 Ce 0.8 O 2 (LCO) films. The YCO buffer layer has good in-plane texture with purely c-oriented grains. The YCO films deposited on La 2 Zr 2 O 7 (LZO) also demonstrate the good texture and the perfect surface quality. YBCO films are prepared on the YCO/LZO and LCO/LZO composite buffer layers through the low fluorine solution route. The YBCO film deposited on the YCO/LZO buffer layer displays a high T c of 89.6 K with a low transition temperature width (DT = 0.45 K), and a J c value of 0.5 MA/cm 2 , which is superior to that deposited on LCO/LZO buffer layer. Graphical Abstract Gd-, Y-, and La-doped CeO 2 films (Gd 0.2 Ce 0.8 O 2 , Y 0.2 Ce 0.8 O 2 , and La 0.2 Ce 0.8 O 2 ) are prepared on Ni-W tapes through sol-gel method. GCO film has a coarse surface, and the YCO film has the best texture and surface quality. Y 0.2 Ce 0.8 O 2 /La 2 Zr 2 O 7 and La 0.2 Ce 0.8 O 2 / La 2 Zr 2 O 7 composite buffer layers are also prepared and compared. The surface quality of Y 0.2 Ce 0.8 O 2 /La 2 Zr 2 O 7 is superior to that of La 0.2 Ce 0.8 O 2 /La 2 Zr 2 O 7 composite buffer layer. High-T c YBCO films with sharp DT = 0.45 K and a J c value of 0.5 MA/cm 2 are successfully obtained on the Y 0.2 Ce 0.8 O 2 /La 2 Zr 2 O 7 film, which is superior to that on La 0.2 Ce 0.8 O 2 /La 2 Zr 2 O 7 buffer layer.

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High-efficiency preparation of high-quality YBCO superconducting films using an ultralow-fluorine sol–gel method

Cited by 11 publications

References 15 publications

Optimization of fluorine content in TFA-MOD precursor solutions for YBCO film growth

Optimization of fluorine content in TFA-MOD precursor solutions for YBCO film growth

Chemical Solution Deposition of Epitaxial YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-x</sub> /CeO<sub>2</sub>/ La<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> Multilayer Films on Biaxially-Textured Ni-W Tapes

Sol–gel deposition of high-performance Re0.2Ce0.8O2/La2Zr2O7 composite buffer layers on Ni–W tapes for YBCO coated conductors

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High-efficiency preparation of high-quality YBCO superconducting films using an ultralow-fluorine sol–gel method

Cited by 11 publications

References 15 publications

Optimization of fluorine content in TFA-MOD precursor solutions for YBCO film growth

Optimization of fluorine content in TFA-MOD precursor solutions for YBCO film growth

Chemical Solution Deposition of Epitaxial YBa&lt;sub&gt;2&lt;/sub&gt;Cu&lt;sub&gt;3&lt;/sub&gt;O&lt;sub&gt;7-x&lt;/sub&gt; /CeO&lt;sub&gt;2&lt;/sub&gt;/ La&lt;sub&gt;2&lt;/sub&gt;Zr&lt;sub&gt;2&lt;/sub&gt;O&lt;sub&gt;7&lt;/sub&gt; Multilayer Films on Biaxially-Textured Ni-W Tapes

Sol–gel deposition of high-performance Re0.2Ce0.8O2/La2Zr2O7 composite buffer layers on Ni–W tapes for YBCO coated conductors

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Chemical Solution Deposition of Epitaxial YBa<sub>2</sub>Cu<sub>3</sub>O<sub>7-x</sub> /CeO<sub>2</sub>/ La<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> Multilayer Films on Biaxially-Textured Ni-W Tapes