Gas-to-particle conversion in the particle precipitation-aided chemical vapor deposition process II. Synthesis of the perovskite oxide yttrium chromite

Journal Article · Mon Nov 01 00:00:00 EST 1993 · Aerosol Science and Technology; (United States)

DOI:https://doi.org/10.1080/02786829308959659· OSTI ID:5550977

Dieten, V E.J. van; Dekker, J P; Hurkmans, E J; Schoonman, J ^[1]

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1. Delft Univ. of Technology (Netherlands)

In the particle precipitation-aided chemical vapor deposition process, an aerosol is formed in the gas phase at elevated temperatures. The particles are deposited on a cooled substrate. Coherent layers with a controlled porosity can be obtained by a simultaneous heterogeneous reaction, which interconnects the deposited particles. The synthesis of submicrometer powder of the perovskite oxide yttrium chromite (YCrO[sub 3]) by gas to particle conversion, which is the first step of the PP-CVD process, has been investigated, and preliminary results are shown. The powders have been synthesized using yttrium trichloride vapor (YCl[sub 3]), chromium trichloride vapor (CrCl[sub 3]), and steam and oxygen as reactants. The influence of the input molar ratio of the elements on the composition and characteristics of the powders has been investigated. Phase composition has been determined by X-ray diffraction (XRD). The powders have been characterized by transmission electron microscopy (TEM) and sedimentation field flow fractionation (SF[sup 3]). At a reaction temperature of 1283 K the powders consist of the chromium sesquioxide (Cr[sub 2]O[sub 3]), or a mixture of Cr[sub 2]O[sub 3] and YCrO[sub 3]. At stoichiometeric input amounts of metal chlorides and steam the formation of YCrO[sub 3] seems to be favored. 19 refs., 6 figs., 3 tabs.

• OSTI ID: 5550977
• Journal Information: Aerosol Science and Technology; (United States), Vol. 19:4; ISSN 0278-6826
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
30 DIRECT ENERGY CONVERSION
AEROSOLS
CHEMICAL VAPOR DEPOSITION
CHROMIUM COMPOUNDS
SYNTHESIS
YTTRIUM COMPOUNDS
AGGLOMERATION
COMPILED DATA
FUEL CELLS
OXIDES
PARTICLE SIZE
PEROVSKITES
POWDERS
PRECIPITATION
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
CHALCOGENIDES
CHEMICAL COATING
COHERENT SCATTERING
COLLOIDS
DATA
DEPOSITION
DIFFRACTION
DIRECT ENERGY CONVERTERS
DISPERSIONS
ELECTROCHEMICAL CELLS
ELECTRON MICROSCOPY
INFORMATION
MICROSCOPY
NUMERICAL DATA
OXYGEN COMPOUNDS
SCATTERING
SEPARATION PROCESSES
SIZE
SOLS
SURFACE COATING
TRANSITION ELEMENT COMPOUNDS
400201* - Chemical & Physicochemical Properties
300503 - Fuel Cells- Materials
Components
& Auxiliaries