Preparation of Y2O3:Eu Phosphor Particles of Filled Morphology at High Precursor Concentrations by Spray Pyrolysis

Kang, Y. C.; Roh, Hyun Sook; Park, S. B.

doi:10.1002/(sici)1521-4095(200003)12:6<451::aid-adma451>3.3.co;2-j

Cited by 34 publications

(41 citation statements)

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“…A dimensionless number, Weber number, is a measure of the magnitude of relative strength of these two forces. Metal-organic compounds Improve volatility for application in AACVD and in gas-to-particle conversion Acetate [4], Oxalate [5], Butoxide [6], Alkoxide [7], Cu(hfac) 2 [8] Organometallic compounds Improve volatility for application in AACVD and in gas-to-particle conversion Sn(CH 3 ) 4 [9], Al(i-Bu) 3 [10] Colloid Control porosity of particles Particulate sol [11], Polymeric sol [12], November, 2010…”

Section: Droplet Generators and Carrier Gas For Spray Pyrolysismentioning

confidence: 99%

Design of particles by spray pyrolysis and recent progress in its application

Jung

Park

Kang

2010

Korean J. Chem. Eng.

146

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Spray pyrolysis is a promising aerosol process to produce "designer particles" of precisely controlled morphology with decorations on surfaces or inside particles. Need of precise control of properties has sparked researches on aerosol process that may replace conventional processes such as solid state reaction process or liquid precipitation method. However, productivity is the biggest obstacle in the development of a commercial scale process because the aerosol process is essentially operated at low particle concentration compared to liquid phase processes. In this review, by reviewing publications for the last 10 years we discuss how researchers on spray pyrolysis circumvent this inherent limitation of the aerosol process. First, the process of particle design by spray pyrolysis is introduced. Some key criteria are explained for selecting each component of spray pyrolysis: precursor, additive, carrier gas, heat source, and reactor type. Second, key contributions of major groups in Korea, Japan, Europe, and America are described. Third, some of named processes to overcome productivity of spray aerosol process are introduced. Fourth, applications of spray pyrolysis to materials related to alternative energy, environmental cleaning, information processing and display, and biomaterials are considered. Finally, future prospects of spray pyrolysis are discussed along with current standing issues for further progress of spray pyrolysis.

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Section: Droplet Generators and Carrier Gas For Spray Pyrolysismentioning

confidence: 99%

Design of particles by spray pyrolysis and recent progress in its application

Jung

Park

Kang

2010

Korean J. Chem. Eng.

146

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“…Spray pyrolysis is one of the more promising processes for the preparation of improved ceramic and metal powders [9][10][11][12][13][14][15]. The powders synthesized by spray pyrolysis are relatively uniform in size and composition, spherical in shape, fine-sized, and have non-aggregation characteristics because of their micro-scale reaction within a droplet and the lack of a milling process.…”

Section: Introductionmentioning

confidence: 72%

Spherical shape Ba-based glass powders prepared by spray pyrolysis for MLCCs

Hong

Jung

2008

J Electroceram

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Spherical shape BaO-B 2 O 3 -SiO 2 glass powders were directly prepared by high temperature spray pyrolysis at >1000°C. The thermal and morphological characteristics of the prepared glass powders were investigated. The glass powders prepared at temperature of 1000°C had spherical shape and hollow inner structure. On the other hand, the powders prepared at high temperature of 1300°C had complete spherical shape and dense inner structure by complete melting. The mean size of the glass powders was 0.9 μm. The glass transition temperatures (T g ) of the glass powders obtained by spray pyrolysis at preparation temperatures between 1000 and 1300°C were 601.1°C regardless of the preparation temperatures. The specimen of the glass powders obtained by spray pyrolysis at the preparation temperature of 1300°C had small number of voids even at low sintering temperature of 700°C. In addition, the specimen sintered at temperature of 800°C had dense microstructure without voids.

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“…During the spray pyrolysis, salts in spray solutions precipitate on the surface of the sol particles [6]. As a result, the sol particles in calcined powders are covered by other particles derived from decomposition of the salts, and almost have no chance to grow up.…”

Section: Discussionmentioning

confidence: 93%

“…However, spray pyrolysis derived powders often have a little segregation between two phases. The problem can be solved if spray solution is replaced by colloidal solution, the colloidal spray pyrolysis technique also increase productivity [6].…”

Section: Introductionmentioning

confidence: 99%

Colloidal spray pyrolysis preparation and characterization of nanocrystalline NiO-SDC composite powders for SOFCs

Weng

Wang

et al. 2007

J Electroceram

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The nanocrystalline NiO-Ce 0.8 Sm 0.2 O 1.9 (NiO-SDC) composite powders were prepared by colloidal spray pyrolysis. The morphological characteristics, particle size and distribution of the particles obtained from calcining spray pyrolysis derived powders were investigated. The results showed that: The composite powders from spray colloidal solutions with Ni hydroxy carbonate sols were better than those with Ce-Sm hydroxy carbonate sols in crystallinity and primary particle size. The powders had a very narrow particle size distribution centered at 250 nm in which NiO and SDC primary particles were distributed homogenously. The composite powders could favor the formation of high performance anodes of SOFCs.

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Preparation of Y2O3:Eu Phosphor Particles of Filled Morphology at High Precursor Concentrations by Spray Pyrolysis

Cited by 34 publications

References 0 publications

Design of particles by spray pyrolysis and recent progress in its application

Design of particles by spray pyrolysis and recent progress in its application

Spherical shape Ba-based glass powders prepared by spray pyrolysis for MLCCs

Colloidal spray pyrolysis preparation and characterization of nanocrystalline NiO-SDC composite powders for SOFCs

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