A newly designed ultrasonic spray pyrolysis device to fabricate YBCO tapes

Liu, M.; Zhou, Meiling; Zhai, Longxue; Liu, D.M.; Gao, Xin; Liu, W.

doi:10.1016/s0921-4534(02)02200-1

Cited by 7 publications

(4 citation statements)

References 3 publications

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“…This phenomenon, first described by Wood and Loomis [1], is called as ultrasonic atomization. Ultrasonic atomization is a very effective way to generate fine droplets and has been used in humidifiers, spray [2] and powder production [3,4].…”

Section: Introductionmentioning

confidence: 99%

Analysis of concentration characteristics in ultrasonic atomization by droplet diameter distribution

Yasuda

Bandô

Yamaguchi

et al. 2005

Ultrasonics Sonochemistry

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The droplet diameter distribution and concentration characteristics in ultrasonic atomization were experimentally studied. The samples were aqueous solutions of methanol, ethanol and 1-propanol. The diameter distribution of atomized droplets showed the normal distribution, and the median diameter and standard deviation were expressed by means of the ultrasonic condition and the liquid properties. The concentration characteristic in ultrasonic atomization was analyzed by using the model of shell and core to the atomized droplet, where the former and latter consist of solute and solution, respectively. The value, which was surface solute amount in droplet multiplied by the molecular volume, increased with increasing solute molar fraction in bulk liquid and was independent of alcohol kinds. The rate of accompanying liquid and the solute molar fraction in accompanied liquid were estimated from the diameter distribution and the surface solute amount in droplet.

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Section: Introductionmentioning

confidence: 99%

Analysis of concentration characteristics in ultrasonic atomization by droplet diameter distribution

Yasuda

Bandô

Yamaguchi

et al. 2005

Ultrasonics Sonochemistry

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“…The ultrasonic spray pyrolysis apparatus was shown in our previous paper [6]. A Y, Ba and Cu nitrate solution were made by dissolving Y(NO 3 ) 3 , Ba(NO 3 ) 2 and Cu(NO 3 ) 2 in distilled water.…”

Section: Methodsmentioning

confidence: 99%

“…The surface morphology of the sample predeposited at 700 • C is shown in figure 5(B). In addition, we noticed that if the content of Cu in the precursor solution of the predeposited sample was less than that of the unpredeposited one (Y:Ba:Cu = 0.9:2:0.5 [6]), then the unwanted CuO phase would diminish from the final films. The reason for this may be that Cu(NO 3 ) 2 has a relatively lower decomposition temperature (200 • C), which made it preferentially deposited on the metal substrate at 700 • C [3,[7][8][9].…”

Section: Uniformity Of Long Tapesmentioning

confidence: 99%

Fabrication of YBCO tapes on Ag substrates by the ultrasonic spray pyrolysis method

Liu¹,

Liu²,

Zhou³

et al. 2004

Supercond. Sci. Technol.

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15 cm long YBCO superconducting tapes with J c of 10 4 A cm −2 were fabricated by the ultrasonic spray pyrolysis method. Predeposition for 15 min at 700 • C can effectively prevent the Ag substrate from vaporizing and diffusing into YBCO films, and improve the coarse surface of Ag, and the surface morphology and connectivity of YBCO films, and therefore increase the superconducting properties. Holding the temperature at 900 • C for 30 min after deposition improves the texture and connectivity of YBCO films.

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“…Since its initial use for the deposition of CdS films for solar cells, 12 it has been successfully implemented in the fabrication of thin films of metal oxides, chalcogenides, and high temperature superconductors. 13 The main component of a spray pyroly-sis system is an atomizer that generates microdroplets of a precursor solution dissolved in a relatively volatile solvent. The droplets, in the form of a fine spray, are carried out of a nozzle onto a heated substrate by a carrier gas that can be inert or reactive.…”

Section: Introductionmentioning

confidence: 99%

Laser-assisted spray pyrolysis process for the growth of TiO₂ and Fe₂O₃ nanoparticle coatings

2007

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We present a laser-assisted spray pyrolysis method to fabricate nanoparticle coatings of metal oxides. In this process, 1.5-μm size droplets of a titanium- or iron-containing organometallic precursor were injected into a vacuum chamber with SF6 carrier gas. The strong absorption of a 3W CO2 laser beam focused onto the injector tip in the presence of SF6 increased the temperature of the gas and the droplets to about 300 °C. Films deposited on heated substrates with and without the CO2 laser heating were studied by atomic force microscopy. The laser heating of the droplets caused the solvent to evaporate before depositing on the substrate, leading to grain sizes that are about a factor of 3 smaller than those deposited without laser heating. By controlling the concentration of the precursor in the solvent, the average particle sizes have been tuned from 80 to 50 nm.

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A newly designed ultrasonic spray pyrolysis device to fabricate YBCO tapes

Cited by 7 publications

References 3 publications

Analysis of concentration characteristics in ultrasonic atomization by droplet diameter distribution

Analysis of concentration characteristics in ultrasonic atomization by droplet diameter distribution

Fabrication of YBCO tapes on Ag substrates by the ultrasonic spray pyrolysis method

Laser-assisted spray pyrolysis process for the growth of TiO₂ and Fe₂O₃ nanoparticle coatings

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A newly designed ultrasonic spray pyrolysis device to fabricate YBCO tapes

Cited by 7 publications

References 3 publications

Analysis of concentration characteristics in ultrasonic atomization by droplet diameter distribution

Analysis of concentration characteristics in ultrasonic atomization by droplet diameter distribution

Fabrication of YBCO tapes on Ag substrates by the ultrasonic spray pyrolysis method

Laser-assisted spray pyrolysis process for the growth of TiO2 and Fe2O3 nanoparticle coatings

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Laser-assisted spray pyrolysis process for the growth of TiO₂ and Fe₂O₃ nanoparticle coatings