V 2015

Fire resistance of vertical glazed elements  
This paper discusses main problems related to the fire resistance of vertical glazed elements – test methodology and way of classification for this type of elements. In addition, the article presents the conclusions from the tests of fi re resistance of such elements conducted in the last years by the Fire Research Department of Building Research Institute.
Bartłomiej Sędłak M.Sc. Eng., Paweł Sulik Ph.D. Eng.

Developing ceramic paints that would enable creation of multilayer coatings using the CMYK colour model
The project involved developing a series of lead-free fluxes, analysing their thermal expansion coefficient and identyfying their characteristic melting points, chemical resistance and the quality of the fired flux surface. A range of ceramic paints was developed on the basis of the selected flux and pigments. Further research involved analysing colour parameters and chemical resistance. Finally colourful patterns were printed out and assessed with regards to the quality of the surface and the obtained colours and their shades.
Barbara Synowiec M.Sc. Eng.

The renaissance of pressed glass based on the history of Ząbkowice Glassworks
The article presents the history of Ząbkowice Glassworks and the innovatory approach to glass technology presented by Eryka and Jan Drost. What had been concidered vices of pressed glass, they made it's virtues. They created pressed glass products on a massive scale never seen before in Poland. In the 70s pressed glass products – which had been considered glass of lower category – started to compete with hand cut cristals. Thanks to that innovatory approach they took pressed glass to higher level. Pressed glass product recognized both in the country and abroad are belived to have become the icons of Polish design.
Kalina Banka M.Sc.

Application of mercury porosimetry in evaluation of the infl uence of thermal shocks on changes in the texture and pore size distribution of magnesia-chrome refractory materials
The mercury porosimetry method is one of basic measuring techniques for the industry of catalysts, ceramics, active carbons and many others. There is also a wide range of possibilities of using mercury porosimetry in the research fi eld related to refractory ceramics design, production and application. The aim of the article is to present one of possible examples of solving research problems related to the determination of textural changes in magnesia-chrome materials subjected to thermal shocks. Analyses of the pore size distribution of 6 magnesiachrome materials characterised by different shock resistance were performed. The investigations were conducted on single samples subjected to 5 and 10 air thermal shocks and their results were compared to the values obtained for the original samples. It was found that in all the examined samples the median diameter of samples subjected to thermal shocks increased. At the same time changes in the pore size distribution were observed, which can be related to the materials’ resistance to thermal shocks. In the case of materials characterized by enhanced thermal shock resistance the number of 10-30 µm pores was increased, whereas in materials characterized by lower thermal shock resistance the increased number of pores was noted for the pore size of 30-90 µm. From the point of view of the quoted example, porosimetric tests should be considered very useful in the solving of research problems related to the effect of destructive factors on refractory ceramics.
Iwona Kozubek M.Sc Eng., Jacek Brzezicki M.Sc. Eng