home > research lines
Long Term Research Lines:
- Crystal nucleation and growth in glasses
- Thermomechanical and rheological properties of glasses
behavior of glasses
- New glasses
Crystallization of Glasses - Mechanisms, Kinetics & Applications
Funding: Pronex / FINEP / CNPq
Materials Laboratory - LaMaV / DEMa - UFSCar (Drs. E.D.Zanotto, O.Peitl
Fº, V.R. Mastelaro, C. Fredericci)
- Laboratory of Solidification - LaSol / DEMa - UFSCar (Dr. C.S.
- Laboratory of Photonic Materials - LaMF / IQ - UNESP (Drs. Y.
Messaddeq, S.J.L Ribeiro, N. Aranha)
The main purpose of this project is to promote
effective integration of three experienced research groups in: oxide glasses
(LaMaV / UFSCar), fluoride and chalcogenide glasses (LaMF / IQ-UNESP) and
metallic glasses (LaSol / UFSCar)- to carry out focused research, described
i) To unmask fundamental aspects of the mechanisms
and kinetics of crystallization of oxide, fluoride, chalcogenide and metallic
ii) To develop materials having technological
applications by controlled crystallization of glasses.
on Glass Crystallization
Researchers: Edgar D. Zanotto, Oscar Peitl Fº, Catia
Fredericci, Eduardo Bellini Ferreira, Vladimir M. Fokin, Miguel O. Prado,
Victor B. Brasil, Luciana A. Souza, Murilo Crovace and Paulo C. Soares Jr.
The general objective of this research is to study in detail and to
contribute to the solution of several important problems regarding the
mechanisms and kinetics of crystal nucleation and growth in glasses.
Crystallization is the focused subject.
The main, specific, objectives of this project are:
1 - To study the competition between sintering and simultaneous
crystallization of powdered glasses, from both theoretical and experimental
points of view, and to define the conditions that favor each phenomenon;
2 - To examine the possible nucleation of metastable phases (MP) in the
initial stages of crystallization in glasses. In case MP are found, to
determine the favorable conditions and the important variables (thermal
history, nucleants, etc.) that control this phenomenon;
3. To determine the possible dependence of the nucleus-liquid surface energy.
of Mixed Former Effect in Ionic Conductor Glasses.
Researchers: Ana Cândida M. Rodrigues, Alvimar A.
Campos, Gilberto Tadashi Niitsu.
The mixed former effect is observed by an increase
in ionic conductivity of some glass systems, when a second glass former is
added to a binary (modifier-former) glass. Oxides systems such as lithium
borosilicate and lithium silicotelurate are being studied in this research.
Borosilicate glasses are reported to present the
mixed former effect, although the complete series were not investigated yet.
The melting of silicotelurates presents considerable difficulty due to
volatilization of tellurium oxide and thus have not been conveniently studied
so far. In this research, the electrical behavior of this late system is
being systematically studied.
ADEMAT (Alfa EU II- Austria) - Advanced Engineering
Materials Training Network
Begining: June, 2003
Tecnologica Nacional, Argentina
Universidad Nacional de Rio Cuarto, Argentina
Universidad de Concepcion, Chile
Universidad Central de Venezuela, Venezuela
Universitat des Saarlandes, Germany
Technische Universitat Freiberg, Germany
Universidad de Alicante, Spain
Universidade de Coimbra, Portugal
Imperial College, UK
Technische Universitat Wien, Austria
International Quality Network (IQN)
Universidade Federal São Carlos, São Carlos, Brazil,
Bulgarian Academy of Science, Sofia, Bulgaria,
University of Chemical Technology and Metallurgy, Sofia, Bulgaria
University of Central Florida, Orlando, USA.
In particular, the following is enabled:
Scholarships for advanced students, who would like to spend one or two
semesters in Jena University, short-time scholarships for foreign
Ph.D.-students, long-time scholarships for foreign students who would like to
do a substantial part of their Ph.D.-thesis in Jena University and
scholarships for foreign post-docs. Additionally two guest professorships for
six months each are financed.
The project is focused on materials science and
materials chemistry. The topic of the cooperation between the participating
institutions is "preparation and properties of glass-ceramics".
Here, especially glass-ceramics with small crystallite sizes and a large
volume content of crystallites are considered. This is of high scientific
interest especially with respect to optical applications. This primarily
should be achieved by the chemical composition of the glass. At the moment,
oxyhalogenide glasses are favored. They also offer the advantage to enable
light induced nucleation. Besides, rare earth elements may be incorporated in
the crystal phase precipitated. This should enable the preparation of
luminescence and laser materials
ICG (International Commission on Glass)
Glass crystallization and
Chair: Prof Dr. Wolfram Höland,
Vice-Chair Prof Dr Wolfgang Pannhorst, Germany
Dr. Ian Donald, AWE Aldermaston, Great Britain
Dr. V. Fokin, Academy of Science, St Petersburg, Russia
Prof. Dr. Klaus Heide, Germany
Prof. Peter James, Sheffield University, UK
Prof. Dr. Tadashi Kokubo, University of Kyoto, Japan
Dr. Ralf Müller, BAM, Berlin, Germany
Dr. Linda Pinckney, Corning Inc., USA
Prof. Dr. Jaroslav Sestak, Academy of Science, Prague, Czech Republic
Dr. I. Szabo, University of Veszprem, Hungary
Dr. Günter Völksch, University of Jena, Germany
Dr. Masamichi Wada, Nippon Electric Glass Co Ltd., Japan
Prof. Dr. Michael Weinberg, University of Arizona, USA (deceased)
Prof. Dr. Edgar D Zanotto, Federal University of São Carlos