I 2015

Studying influence of element Gd on voids degree of structure the tellurite glass     
Studying influence of element Gd on voids degree of structure the tellurite glass The tellurite glass such as: TeO2-P2O3-ZnOLiNbO3 as a reference glass and (TeO2-P2O3- ZnO-LiNbO3) (Gd2O3) has been studied. The positron lifetime PALS (Positron Annihilation Lifetime Spectroscopy) was used to analyze the structural properties of tellurite glasses. The proposed method, can identify structural defects which are diffi cult to capture by other traditional methods. The study showed the existence of two components Τ1 i Τ2. The basis of the two-state model parameters were calculated capture of positrons, which allow you to draw conclusions about the nature and degree of defect studied tellurite glasses.
prof. AJD Jacek Filipecki Ph.D. Eng.

Ceramics overcoming brittleness: elementary notions
Relations between the rate of elastic energy release and stress intensity coefficients permit a unified use of the Irwin’s fracture toughness concept and the Griffi th’s energy balance-based approach based on energy balance. That this allows a simple and general description and prediction of ways of increasing fracture toughness in various types of ceramic materials (monolithic polycrystals, particulate composites, all-ceramic fibre-reinforced composites and laminates).
prof. Roman Pampuch  Ph.D. Eng.

Chinese porcelain artefacts
During many years of archaeological research in the old town of Elblag, dozens of Chinese porcelain artefacts (china porcelain) were found. They consisted of a variety of dishes, such as cups for tea and alcoholic drinks, teapots with a grooved surface (moulded “pumpkin-shaped” teapots), small dishes for jam, dessert plates, and rice bowls. The dishes were decorated with blue and white painting (under-glaze blue painting), so called Kraak- porcelain from Wanli-Period, and the dishes had floral pattern (Blue and White Flora Reserves), covered on the exterior of the bowl being decorated with Batavia brown engobe from the Kangxi-Period. There were multicolour- painted dishes (over-glazed enamels) in the pink family technique, china-imari and imari-rouge-de-fer from the Qing-Period.
Barbara Pospieszna  Ph.D.

Synthesis of wollastonite on the basis of common raw materials
Wollastonite is a mineral used in various industries. Since there is no economically important deposits of wollastonite in Central Europe, groups of experiments were performed to prepare wollastonite based on cheap natural raw materials. The solid statereaction method was selected with interval of temperature in the range of 1000-1300°C. Lacustrine chalk, limestone and calcite veins were sources of calcium, whereas glass sand and quartzite schist were used as a source of silica. Best results were obtained for lacustrine chalk and quartzite schist. Another important factor is pressing before synthesis – better results were obtained for non-pressed samples.
Arkadiusz Gąsinski Ph.D., Ryszard Sałaciński  Ph.D.