Glass - Back to the Future!

Presenting Author:
Dr Reinhard Conradt

article posted 22 Jul 2016

Dr Reinhard Conradt Reinhard Conradt has been serving as professor at RWTH Aachen University for the past 20 years and is now an emeritus. He studied physics and obtained a doctoral degree in physical chemistry in 1981. His engagement with the world of glass started at the Fraunhofer Institute of Silicate Science in Würzburg (1980 - 1986). From 1987 to 1996, he had a position of lecturer at Chulalongkorn University, Thailand. During this time, he completed his habilitation, which was accepted by RWTH Aachen University. Presently, he is president of the German Society of Glass Technology DGG, and chairman of TC23 'education' of ICG. The focus of his research has been on thermodynamics of glasses, especially of industrial multicomponent systems, as well as of the melting process.

Workshop by Professor Reinhard Conradt

Reinhard Conradt
RWTH Aachen University, GERMANY

Students Workshop "From glass Science to Glass Technology"


One of the twin journals of the SGT has been given the title Glass Science & Technology. This title reflects, in fact, a long a long and fruitful tradition, to combine the academic and the industrial approach to glass. The present workshop intends to follow these footsteps. An outline is given on how the fundamentals of glass science are exploited to characterize the industrial glass melting process in a fully quantitative way. Students will learn to assess the energetics of natural raw materials, raw material batches, multi-component glass melts, and the resulting glasses by evaluating phase diagrams, constitutional relations, and thermodynamic data tables. The following three topics shall be covered:

PART 1: From batch to melt: Batch design and batch calculation using real raw material; redox state, batch costs; energy demand of melting.

PART 2: Glass and glass melt: The isochemical polycrystalline state; heat and Gibbs energy of formation, heat content; chemical potentials, vapor pressures of volatiles; a general key to composition-property relations

PART 3: Viscosity: Evaluation of viscosity data with respect to the heat capacity, entropy, and the structure of industrial glasses.