Nanocrystalline YBa2Cu3O7−δ/Ag composite particles produced by aerosol decomposition

Carim, A. H.; Doherty, P. E.; Kodas, Toivo T.; Ott, Kevin C.

doi:10.1016/0167-577x(89)90001-3

Cited by 21 publications

(10 citation statements)

References 7 publications

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“…Particle formation via gas-phase reactions in furnace reactors is reasonably well understood and detailed models have been developed for systems such as silicon particle formation by the decomposition of silane (Wu et al, 1988;Nguyen and Flagan, 1991), silica by the oxidation of SiCl, (Kim andPratsinis, 1988, 1989), and titania by oxidation of TiC1, (Landgrebe et al, 1990;Pratsinis, 1990;Pratsinis et al, 1990); and reaction of titanium isopropoxide (Okuyama et al, 1986Kirkbir and Komiyama, 1987). In addition, a large body of more general models and modeling results is available and can be found in recent reviews (Kodas, 1989;Kodas and Sood, 1990;Pratsinis and Kodas, 1992).…”

Section: Nanophase Materialsmentioning

confidence: 99%

“…Powders or gaseous reactants are carried into a plasma or arc discharge zone where complete vaporization occurs. The vapor cools rapidly while exiting the plasma and ultrafine particles form as a result of the high supersaturation (see reviews by Kodas, 1989;Kodas and Sood, 1990;Pratsinis and Kodas, 1992). Powders of Mn, Fe, Co, Zn, and Mo with particle sizes in the range of 5-50 nm were synthesized by flowing respective oxide powders through a lowtemperature plasma generated using pure Ar or mixtures of Ar/H, or Ar/NH, (Vissikov et a]., 1988).…”

Section: Nanophase Materialsmentioning

confidence: 99%

“…Flame reactors involve gas-phase reactions of precursors injected into diffusion or premixed flames (Ulrich, 1971(Ulrich, , 1984Shon et al, 1979;Zachariah et al, 1989). Oxides of Si and Ti, and most other metals in the periodic table, have been produced by the oxidation of the respective halides in hydrocarbon flames (see reviews by Kodas, 1989;Kriechbaum and Meinschmit, 1989;Pratsinis and KOdas, 1992). Additives can be introduced into the flames to control the phase, shape, and size distribution of the product (Mezey, 1966;Haynes et al, 1979;Akhtar et al, 1992a, b).…”

Section: Nanophase Materialsmentioning

confidence: 99%

“…These reactors involve chemical reactions between precursor vapors in a gas flow through a furnace (see reviews by Kodas, 1989;Kodas and Sood, 1990;Pratsinis and Kodas, 1992). The precursors are introduced into the furnace either as a gas or as an aerosol formed from a solution or solid.…”

Section: Nanophase Materialsmentioning

confidence: 99%

“…review by Kodas, 1989), including metals, metal oxides, nonoxide ceramics, superconducting materials, fullerenes, and nanophase materials. Spray pyrolysis is also called aerosol decomposition (Kodas, 1989), spray roasting (Ruthner, 1983), evaporative decomposition (Gardner et a]., 19841, spray calcination (Vollath, 19901, Aman's process (Aman, 1956), and other name variations in the literature.…”

Section: Spray Pyrolysismentioning

confidence: 99%

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Recent advances in aerosol generation of materials are reviewed. Gas-to-particle and spray processes (spray pyrolysis) for powder generation and various routes for film generation are discussed from the experimental and theoretical perspectives. The range of materials generated by these routes has increased in recent years to include fullerenes and ceramic superconductors. Many metals and various oxide and nonoxide ceramics have also been added to the list of materials generated by gas-phase routes. Established aerosol routes such as vapor condensation have found widespread applications for generation of nanophase materials. The formation of quantum dots via aerosol approaches has also been demonstrated. The theoretical understanding of gas-to-particle conversion routes has advanced to include the finite rate of particle fusion or sintering occurring after collisions of particles. The modeling of spray pyrolysis systems has provided insight into the control of particle morphology and reactor design. In this review, these recent developments in aerosol generation of powders and films via gas-phase and spray routes are discussed with an emphasis on the material chen~istries involved and the synthesis of nanophase materials.

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