Objects
– nanosized ceramic powders processed by plasma technology (oxides,
nitrides, carbonitrides etc.)
Fields
of investigation -
- Investigations
of nanosized plasma-processed powders surface properties (electrokinetic
properties, size and size distribution of powder particles).
- Modification
of powders surface properties and preparation of high-loaded
suspensions for ceramics processing.
- Investigation
of rheological properties and peculiarities of concentrated nanosized
powders suspension.
- Technologies
of ceramics processing from fine nanosized powders.
Suspension characterization and
preparation:
- Zetamaster of Malvern
Instruments (Ltd.) for microelectrophoresis and photon correlation
spectroscopy;
- ultrasonic equipment.
Materials
characterization and preparation:
- furnaces for ceramics sintering
in vacuum and gaseous medium (until 2000 oC), in air (until
1600 oC)
- hardness, flexural strength
technique;
- spray-drying;
- low pressure injection molding.
01.0685 “Electrokinetic
characteristics of the surface of finely dispersed refractory compounds
and its water suspension stability” (2001 – 2004). (L. Čera)
01.0690
“Development of nanostructural ceramic materials for production
of tools and wear resistant materials” (2001- 2004) (I. Zālīte)
01.0686
“Initial processing technology of nanosized ceramics plasma
powders” (2001- 2004) (E. Palčevskis)
MOP*
project: No 1999-57 “Development
and implementation of technology of preparation of thermally treated
ceramic Si3N4 nanopowders” (I. Zālīte)
* - Market Orientated Projects
I.Zalite, M.Herrmann, J.Grabis.
Materials on the basis of finely dispersed Si3N4
powder. - Key Engineering Materials,
vols. 132-136,
1997, pp.1018-1021.
M. Herrmann, I. Schulz, Chr. Schubert, W. Hermel, I. Zalite, G. Ziegler. Ultrafine
Si3N4 Material with Low Coefficients of Friction and
Wear Rates. -cfi/Ber. DKG, 75,
(1998) No.4, pp. 38 - 45.
E.Palcevskis, E.Jakobsons,
L.Faitelson. Rheology of
injection moulding suspension prepared from nanosized plasma processed AlN
powder. - Applied Mechanics and Engineering, 1999, vol.4, Special issue:
ICER ‘99, pp.375-380.
E.Palcevskis, O.Ivanova,
M.Kurasheva. Ceramics from Plasma-Processed Al2O3
Powder. - MEDÝIAGOTYRA (Materials Science) 1999, Nr. 2(9), pp.30-32.
M.Bērziņš, L.Čera,
T.Millers. Electrokinetic and Particle Size Measurements in Aqueous
Suspensions of Plasma-Prepared Zirconia.
Materials of VIII-th International
Baltic Conference. Kaunas,
Technologija, 1999, pp. 55 - 59.
L.Chera, E.Palcevskis, M.Berzins, A.Lipe. The influence of some surfactants
on containing concentrated aqueous suspensions of plasma-processed fine
alumina. – Proceedings of X-th International Baltic Conference
“MATERIALS ENGINEERING & BALTTRIB *2001”. September 27-28, Jurmala,
Latvia, 2001. Riga, Latvia,
pp.22-26.
E.Palcevskis,
U.Reichel, M.Lipe. Sintering of nanosized plasma-processed Al2O3
powders. - Proceedings
of X-th International Baltic Conference “MATERIALS ENGINEERING &
BALTTRIB *2001”. September 27-28, Jurmala, Latvia, 2001. Riga, Latvia,
pp.87-91.
E.Palcevskis,
B.Berzina, L.Trinkler, U.Ulmanis, N.Mironova-Ulmane. Ceramics from fine
plasma processed AlN powder,
sintering and properties. - Latvian Journal of Physics and Technical
Sciences, 1999, No.1, pp.34-52
E. Palčevskis,
L. Faitelsons, E. Jākobsons. Rheological properties of aluminium nitride powders suspensions used for preparation of
advanced ceramics. (In Russian). – Меchanics
of Composite Materials, 2000, v.35,
No.6,
pp.839-850.
I.Zalite,
S.Ordanyan, I.Ivanov, L.Maskhulia. The Effect of Highly Dispersed
Titanium-Niobium Carbonitride Powders on the Formation of Single-Phase
Materials and Cermets – J. of Advanced Materials, vol.32 (2000) No 4,
pp. 3-9.
T.Millers, L.Čera, M.Bērziņš.
Surface Characterization of Yttria- and Magnesia-Dopped Zirconia Powders
Produced by Plasma-Chemical Method. RTU
Zinātniskie Raksti. Sērija 1. Materiālzinātne un lietišķā
ķīmija, 2000, Nr1, 13.-18.lpp.
M.Bērziņš, L.Čera, T.Millers. The Influence of Surface
Active Agents on the Electrokinetic Properties of Plasma-Prepared Alumina
Particles. Latvijas Ķīmijas Žurnāls, 2001, Nr.2, 139. –
141.lpp.
