V 2014

Stress in the glass     
Heat treatment used in the manufacturing of glass is one of the basic technological processes that contribute to the formation of stress. In industrial practice, in order to carry out a proper assessment of the durability of glass products, and in the case of tempered glass and predict the degree of hardening stress distribution methods are used based on the phenomenon of photoelastic birefringence forced. These tests allow you to analyze the size, type and distribution of stresses. The paper presents the results of stress distribution and to assess the size of the economic glassware, packaging, laboratory and fl at with a different state of stress. Provides examples of the impact of various external factors (mechanical, thermal, chemical heterogeneity) on the state of stress in the glass.
Agnieszka Marczewska M.Sc. Eng., Anna Kuśnierz M.Sc. Eng.

“Mycenaean” faience beads from Kietrz in Upper Silesia
The article presents three beads, discovered in an early Lusatian culture grave in Kietrz in the Upper Silesia region and published 30 years ago as glass ones. Based on technological and stylistic features as well as comparative studies of Bronze Age beads made of vitreous materials originating from Europe and the Near East, it has been shown that these are actually artefacts made of ancient faience. They used to be adornments typical for the Eastern Mediterranean and in particular Mycenaean culture. They found their way to the Oder basin through the long distance trade on the amber route. The beads
were put to the grave as the central links of a necklace which acted as a personal adornment as well as an item bearing symbolic and magical value.
Paweł Rzeźnik   Ph.D.

Environmental assessment of proppant production technology based on LCA – compare evaluation
In this paper result of the environmental assessment of two proppant production technology is presented. Similarly as in the preparation of ceramic granules, classical technology includes as follow: milling of raw materials in a wet ball mill and spray-drying granulation. The new technology is based on low-energy wet milling of raw materials with use of drying mill and granulation in an intensive mixer. Environmental analysis was done for two technologies of granulation, based on life cycle assessment LCA (Life Cycle Assessment). Use of LCA analysis allowed to indicate different categories of environmental impact of compared technologies, including the emission of greenhouse gases and cumulative energy demand. The environmental assessment was carried out in accordance with PN-EN ISO 14044:2009, based on three methods of impact assessment: ReCiPe, IPCC, CED. Because of firing of compared granules in both cases is carried out in rotary kilns, comparative LCA analysis include technological operations of preparation of granules for firing.
prof. Stanisław Serkowski Ph.D. Eng., Jerzy Karol Ph.D. Eng.

Pride, Pottery and Nationalism in Nineteenth-Century Ireland
Throughout the nineteenth century it was oftentimes mentioned by British politicians or the British press that Ireland should utilize its natural resources in order to improve its condition. In the 1850s the discovery of feldspar and kaolin in County Fermanagh in the north-western part of Ireland ushered in the pottery industry on the Emerald Isle. The Belleek pottery allowed the Irish to feel proud. What is more, the clayware from Belleek found patrons in Queen Victoria and her son, who bought some specimens and, thus, popularized it in Great Britain. On the heels of the spectacular success of the Belleek came Fredrick Vodrey who not only produced excellent pottery but by employing Celtic motifs became a part of the Gaelic Revival, which helped to the Irish to bolster their national identity and mitigate the infl uence of Anglo-Saxon culture. The article shows what role the Belleek and Vodrian pottery played in Ireland in the nineteenth century when the Irish where trying to gain independence.
Paweł Hamera Ph.D.