Name, title:

Tomaž Kosmač,  Prof.,




“Jožef Stefan” Institute, Jamova 39, 1000 Ljubljana, Slovenia


Personal Data:

Born 19/10/1948, Ljubljana, Slovenia

Married, 2 children



B.Sc.: 1974 in Metallurgy from University of Ljubljana

M.Sc.: 1987 in Metallurgy from University of Ljubljana

Dr. Sc.: 1982 in Chemistry from University of Ljubljana



- Since 1974 - “Jožef Stefan”  Institute, Ljubljana, Slovenia

- 1979 - 1980 on leave with Max Planck Institute for Metal Research, PML, Stuttgart, FRG, as visiting research fellow

- 1990 - 1991 visiting Associate Professor at the University of Virginia, Mat. Sci. Dept., Charlottesville VA

- Present position at IJS: head of Engineering Ceramics Department

- Since 1995 – Part-time Associate Professor, Metallurgy and Materials Dept., University of Ljubljana



- National (B. Kidrič Fund) award for valuable contribution to better understanding of mechanical properties of oxide ceramics (1983)

- Rewards for development and implementation of fused silica ceramics (1986) and ceramic cutting tools (1988)

- National (Ž. Zois Fund) award for valuable technological achievement (2003)



- Slovenian Materials Science Society

- Slovenian Chemical Society, Ceramics Division

- German Materials Science Society (DGM)

- European Ceramic Society

- American Ceramic Society


Main Research Topics:

- Oxide ceramics for structural application with special emphasis on diffusion processes and solid state reactions during sintering of composite materials.

- Mechanical properties of zirconia- toughened ceramics.

- Ceramic processing (including mechano-chemical powder synthesis, colloidal- and deformation powder processing, forming and sintering of green bodies) and its influence on the microstructure and mechanical properties of engineering ceramics.

- Ceramics with bio-medical, in particular dental, applications.

- Beside basic research activities T. Kosmač is acting as principal investigator in several bi-lateral, international (EC, Eureka, NATO SfP) projects as well as applied research projects leading to industrial production.



- over 230 documents, including 110 major publications, 28 invited papers and lectures, 6 patents, 1 patent application, 1 conference proceedings (ed.); 420 citations



Selected major publications (from 1997):

(1) KOSMAČ, Tomaž, JANSSEN, R. Low pressure injection moulding of SiC platelet reinforced reaction bonded silicon nitride. J. Mater. Sci., 1997, vol. 32, str. 469-474.

(2) SAJKO, Marjan, KOSMAČ, Tomaž, DIRSCHERL, R., JANSSEN, R. Microstructure and mechanical properties of low-pressure injection-moulded reaction-bonded alumina ceramics. J. Mater. Sci., 1997, vol. 32, str. 2647-2653. 

(3) NOVAK, Saša, VIDOVIĆ, Krunoslav, SAJKO, M., KOSMAČ, Tomaž. Surface modification of alumina powder for LPIM. J. Eur. Ceram. Soc.. [Print ed.], 1997, 17, str. 217-223.

(4) KOSMAČ, Tomaž, NOVAK, Saša, SAJKO, Marjan. Hydrolysis-assisted solidification (HAS): a new setting concept for ceramic net-shaping. J. Eur. Ceram. Soc.. [Print ed.], 1997, 17, str. 427-432.

(5) NOVAK, Saša, KOSMAČ, Tomaž. Interactions in aqueous Al[sub]2O[sub]3-AlN suspensions during the HAS process. Mater. sci. eng., A Struct. mater. : prop. microstruct.  process.. [Print ed.], 1998, vol. 256, str. 237-242.

(6) KOSMAČ, Tomaž, OBLAK, Čedomir, JEVNIKAR, Peter, FUNDUK, Nenad, MARION, Ljubo. The effect of surface grinding and sandblasting on flexural strength and reliability of Y-TZP zirconia ceramics. Dent Mater. [Print ed.], 1999, vol. 15, str. 426-433.

(7) KOSMAČ, Tomaž, OBLAK, Čedomir, JEVNIKAR, Peter, FUNDUK, Nenad, MARION, Ljubo. Strength and reliability of surface treated Y-TYP dental ceramics. J. biomed. materi. res., 2000, vol. 53, št. 4, str. 304-313.

(8) DAKSKOBLER, Aleš, KOSMAČ, Tomaž. Weakly flocculated aqueous alumina suspensions prepared by the addition of Mg(II) ions. J. Am. Ceram. Soc., 2000, vol. 83, str. 666-668.

(9) KRNEL, Kristoffer, KOSMAČ, Tomaž. Reactivity of aluminum nitride powder in dilute inorganic acids. J. Am. Ceram. Soc., 2000, vol. 83, str. 1375-1378.

(10) KOSMAČ, Tomaž, DROFENIK, Mihael. Reactive sintering of MnZn ferrites = Reaktivno sintranje MnZn feritov. Acta chim. slov., 2001, letn. 48, št. 1, str. 101-114.

(11) DAKSKOBLER, Aleš, KOSMAČ, Tomaž. Destabilisation of an alkaline aqueous alumina suspension by the addition of magnesium acetate. Colloids surf., A Physicochem. eng. asp.. [Print ed.], 2001, vol. 195, str. 197-203.

(12) KRNEL, Kristoffer, KOSMAČ, Tomaž. Protection of AlN powder against hydrolysis using aluminum dihydrogen photosphate. J. Eur. Ceram. Soc.. [Print ed.], 2001, vol. 21, str. 2075-2079.

(13) DAKSKOBLER, Aleš, KOČEVAR, Klemen, KOSMAČ, Tomaž. Short-range repulsive potential developed by the addition of Mg(II) ions to aqueous alumina slurries. J. Eur. Ceram. Soc.. [Print ed.], 2001, vol. 21, str. 2361-2368.

(14) NOVAK, Saša, KALIN, Mitjan, KOSMAČ, Tomaž. Chemical aspects of wear of alumina ceramics. Wear. [Print ed.], 2001, vol. 250, no. 1/12, str. 318-321.

(15) KOSMAČ, Tomaž, NOVAK, Saša, KRNEL, Kristoffer. Hydrolysis assisted solidification process and its use in ceramic wet forming : dedicated to professor Dr. Drago Kolar in memory of this brilliant scientist and teacher. Z. Met.kd., 2001, vol. 92, str. 150-157.

(16) NOVAK, Saša, KOSMAČ, Tomaž. Preparation of alumina ceramics from aqueous suspensions employing the hydrolysis of aluminum nitride. J. mater. res., 2002, vol. 17, str. 445-450.

(17) KRNEL, Kristoffer, KOSMAČ, Tomaž. Reactivity of aluminum nitride powder in aqueous silicon nitride and silicon carbide slurries. J. Am. Ceram. Soc., 2002, vol. 85, str. 484-486.

(18) DAKSKOBLER, Aleš, KOSMAČ, Tomaž, CHEN, I-Wei. Paraffin-based process for producing layered composites with cellular microstructures. J. Am. Ceram. Soc., 2002, vol. 85, str. 1013-1015.

(19) NOVAK, Saša, KOSMAČ, Tomaž, KRNEL, Kristoffer, DRAŽIĆ, Goran. Principles of the hydrolysis assisted solidification (HAS) process for forming ceramic bodies from aqueous suspension. J. Eur. Ceram. Soc.. [Print ed.], 2002, vol. 22, str. 289-295. [COBISS.SI-ID 16353063].

(20) KEVORKIJAN, Varužan, KOSMAČ, Tomaž, KRNEL, Kristoffer. Spontaneous reactive infiltration of porous ceramic preforms with Al-Mg and Mg in the presence of both magnesium and nitrogen - new experimental evidence. Mater. manuf. process., 2002, vol. 17, no. 3, str. 307-322.

(21) KEVORKIJAN, Varužan, KOSMAČ, Tomaž, KRNEL, Kristoffer. Preparation and characterization of ceramic-metal composites obtained by reactive metal penetration and reactive infiltration of ceramic preforms. J. adv. mater., Oct. 2003, vol. 35, no. 4, str. 28-35.

(22) NOVAK, Saša, LAHAJNAR, Gojmir, SEPE, Ana, KOSMAČ, Tomaž. Role of water during AlN-hydrolysis-assisted solidification in ceramic suspensions studied by proton nuclear magnetic resonance T[sub]2 relaxation. J. mater. res., 2003, vol. 18, str. 1968-1974.

(23) HENRIQUES OLHERO, Susana Maria, NOVAK, Saša, OLIVIERA, M., KRNEL, Kristoffer, KOSMAČ, Tomaž, FONTE FERREIRA, José Marija. A thermo-chemical surface treatment of AlN powder for the aqueous processing of AlN ceramics. J. mater. res., 2004, vol. 19, str. 746-751.

(24) KRNEL, Kristoffer, DRAŽIĆ, Goran, KOSMAČ, Tomaž. Degradation of AlN powder in aqueous environments. J. mater. res., 2004, vol. 19, str. 1157-1163.

(25) OBLAK, Čedomir, JEVNIKAR, Peter, KOSMAČ, Tomaž, FUNDUK, Nenad, MARION, Ljubo. Fracture resistance and reliability of new zirconia posts. J Prosthet Dent, 2004, letn. 91, št. 4, str. 342-348. [COBISS.SI-ID 17848025].

(26) DAKSKOBLER, Aleš, KOSMAČ, Tomaž. The preparation and properties of Al[sub]2O[sub]3-ZrO[sub]2 composites with corrugated microstructures. J. Eur. Ceram. Soc. [Print ed.], 2004, vol. 24, str. 3351-3357.

(27) LEVERKOEHNE, M., DAKSKOBLER, Aleš, VALANT, Matjaž, JANSSEN, R., KOSMAČ, Tomaž. Cr-Al[sub]2 layered composites with a high electrical anisotropy prepared by repeated deformation processing. J. Eur. Ceram. Soc.. [Print ed.], 2005, vol. 25, str. 65-72.