VI 2013

Glass facades in energy-saving buildings
Changes in regulations and fashion for energy efficiency forces on modern building development of new materials and technology. Facades of buildings, which until recently have mainly representative functions, have to adapt to this trend. The purpose of this article is to review modern glazing facades systems of buildings. The requirements which must be fulfilled by glass facades to be considered for low energy were presented. There are also presented capabilities of obtaining solar energy in modern facades and windows.
Małgorzata Fedorczak-Cisak Ph.D Eng., Alicja Kowalska-Koczwara Ph.D. Eng.

Design methods of building glass
The paper presents design rules of the glass structures. The article summarizes the most popular design methods and describes a calculation method based on the draft European standards. The article contains the author's comments on the practical aspects of the design.
Artur Piekarczuk Ph.D. Eng.

Yttrium (III) oxide application for manufacturing prime coat of ceramic shell moulds used in investment casting
This work present the rheological properties of ceramic slurries based on yttrium oxide powders with two different granulation (200 mesh and 325 mesh) added in a ratio of 35%÷65% by weight. Solid phase was 81 wt.%. To manufacture ceramic shell moulds the Evonik binder with nanoparticles of aluminium oxide was used. In addition the poli(acrylic) binder as a liquefi er was also used. Y2O3 it’s a new material used to fabricate ceramic shell moulds for investment casting of turbine aircraft parts using nickel and titanium superalloys. Grain size and microstructure observation were researched for yttria. Relative and dynamic viscosities, density, pH and plate weight test of ceramic slurries were studied. The measurements were taken by 96 hours. It were proven that ceramic slurries based on yttrium (III) oxide meet the standard investment casting requirements. After tests, ceramic shell moulds for investment casting aircraft turbine parts were manufactured by Bridgman technique.
Marcin Małek M.Sc. Eng.

Paxton Vobiscum’: Joseph Paxton and the phenomenon of the Crystal Palace

The article deals with the history of the success of the Crystal Palace that was built in London as the venue of the Great Exhibition of 1851. It symbolized the might of the British Empire as well as the ingenuity of its author, a gardener, Joseph Paxton (1803-1865). The erection of such an impressive building was possible thanks to the outcomes of the Industrial Revolution and Paxton’s experiments with the use of glass and steel. Being initially a source of disputes and anxiety, the Crystal Palace became a major attraction of the Great Exhibition. In addition, it allowed Paxton to go down in history as one of the best architects of the Victorian period.

Paweł Hamera Ph.D.