Generation, properties, and order packing of monodispersed spherical colloid particles of yttrium hydroxy-carbonate: A colloidal route to minimizing voids in ceramics
Technical Report
·
OSTI ID:5354224
Yttrium hydroxy-carbonate particles were prepared by decomposition of urea in yttrium nitrate solutions. The nucleation and growth were studied in silica-seeded and unseeded systems. Precipitation took place only under neutral conditions. In unseeded systems, homogeneous nucleation yielded 3 x 10/sup 10/ nucleicm/sup 3/ while in seeded precipitation enough nuclei were produced to bring the total number of particles to 4 x 10/sup 10/cm/sup 3/. Systems containing at least 4 x 10/sup 10/ seedscm/sup 3/ underwent pure heterogeneous precipitation onto the existing seeds. Two diffusion-controlled growth models and the diffusion chronomal analysis were applied to the data of growth rate. Results confirmed the diffusion-controlled particle growth mechanism. Electron diffraction showed the particles to be crystalline. Electrophoresis showed a charge reversal from positive to negative with pH, with an isoelectric point of about 7.4. The chemical composition of the powders was determined to be Y(OH)CO/sub 3/ . H/sub 2/O. Stability of aqueous suspensions was studied as a function of pH. 74 refs., 27 figs., 3 tabs
- Research Organization:
- Ames Lab., IA (USA)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 5354224
- Report Number(s):
- IS-T-1302; ON: DE88007633
- Country of Publication:
- United States
- Language:
- English
Similar Records
Generation, properties, and order packing of monodispersed spherical colloid particles of yttrium hydroxycarbonate: A colloidal route to minimizing voids in ceramics
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Thesis/Dissertation
·
Thu Dec 31 23:00:00 EST 1987
·
OSTI ID:6945482
Preparation of monodispersed yttrium hydroxycarbonate spheres by homogeneous precipitation
Technical Report
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Mon Jun 01 00:00:00 EDT 1987
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OSTI ID:6427782
Coagulation of submicron colloids in water treatment by incorporation into aluminum hydroxide floc
Journal Article
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Tue Oct 01 00:00:00 EDT 1991
· Environmental Science and Technology; (United States)
·
OSTI ID:5148697
Related Subjects
36 MATERIALS SCIENCE
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AMIDES
CARBON COMPOUNDS
CARBONATES
CARBONIC ACID DERIVATIVES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COLLOIDS
DECOMPOSITION
DISPERSIONS
GRAIN GROWTH
HYDROGEN COMPOUNDS
HYDROXIDES
MINERALS
NUCLEATION
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PH VALUE
PRECIPITATION
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SOLS
STABILITY
SUSPENSIONS
TRANSITION ELEMENT COMPOUNDS
UREA
YTTRIUM CARBONATES
YTTRIUM COMPOUNDS
YTTRIUM HYDROXIDES
YTTRIUM OXIDES
360201 -- Ceramics
Cermets
& Refractories-- Preparation & Fabrication
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400201* -- Chemical & Physicochemical Properties
AMIDES
CARBON COMPOUNDS
CARBONATES
CARBONIC ACID DERIVATIVES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COLLOIDS
DECOMPOSITION
DISPERSIONS
GRAIN GROWTH
HYDROGEN COMPOUNDS
HYDROXIDES
MINERALS
NUCLEATION
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXIDE MINERALS
OXIDES
OXYGEN COMPOUNDS
PARTICLES
PH VALUE
PRECIPITATION
SEPARATION PROCESSES
SILICA
SILICON COMPOUNDS
SILICON OXIDES
SOLS
STABILITY
SUSPENSIONS
TRANSITION ELEMENT COMPOUNDS
UREA
YTTRIUM CARBONATES
YTTRIUM COMPOUNDS
YTTRIUM HYDROXIDES
YTTRIUM OXIDES