I 2014

Conservation and restoration of the fountain with the figure shown against the background of a mirror in the Hermann Fränkel residential villa in Prudnik
The article shows the process and results of conservation and restoration works on an early 20th century fountain in the Hermann Fränkel residential villa in Prudnik, Kosciuszki 1A Street. The object consists of a woman bending while pouring water from a shell onto a mosaic of glass, surrounded by glass with brass framing. The fi gure is shown against the background of a round, chamfered mirror. Within the mirror are a number of brass profi les, the construction of which resembles that used in stained glass. The entire structure consists of a number of materials including glass, gilded glass mosaic, brass, marble, metal plate as well as layers of paint.This variety of materials was challenging and needed technological study and trial, involving the most recent, as well as innovatory, conservation and restoration techniques.
Michał Matuszczyk Ph.D, Marta Sienkiewicz Ph.D., Piotr Romiński M.Sc.

Maiolica from Nieborów and the discussion on „national art”
The maiolica manufactory in Nieborów was established by prince Michał Piotr Radziwiłł in 1881. Its director was Stanisław Thiele, who had worked in Nevers, France and in Ćmielów. Maiolica from Nieborów reflects the style popular in Europe at that time. It is eclectical, has the forms similar to French or Italian wares. Warsaw journals got involved in heated debates about the style of Nieborów maiolicas. They were criticised for their „Old German” forms and „garish decoration”, it was suggested that inspiration should be drawn from Polish folk pottery. Today, however, the maiolica from Nieborów is seen as one of the most interesting examples of European historicist pottery.
Bożena Kostuch

Sol-gel derived thin films based on SiO2
Thin film SiO2 (Tetraethyl orthosilicate, TEOS) based coatings with or without organic additives (1,2-Propylene glycol, Poly (ethylene glycol)-block-poly(propylene glycol)-blockpoly (ethylene glycol) and doped with metal acetyloacetonates from a group of (Zr, Ti, Sn, Ce, W, Mo, Co) in solutions with organic solvents, and/or MgF2, were obtained on glass by dipping or spray mode. The coatings were examined by GID-XRD, SEM/EDS and UV/VIS/NIR spectroscopy methods and revealed morphology strongly dependent on the composition of zols and heat treatment procedures. The coatings with spectrophotometric parameters similar or better than those of commercial fi lter glasses for digital cameras were obtained.
Tadeusz Jakubiuk M.Sc. Eng.

Mechanical properties of silicon nitride (Si3N4) submitted to Hot Isostatic Pressing and pressureless sintering process – comparative analysis

In the presented paper mechanical properties of silicon nitride (Si3N4) material were studied. Silicon nitride samples were obtained from commercially available powder. Two paths of ceramic manufacturing were applied to obtain fully densifi ed bodies. All of the samples were sintered in nitrogen in atmospheric pressure. Part of the samples were additionally subjected to Hot Isostatic Pressing (HIP). Apparent density, bending strength, Vickers hardness and fracture toughness were measured for the two set of samples, which differed in preparation path. The results were analyzed in order to estimate the infl uence of pressure assisted post-sintering (HIP process) on the microstructure and mechanical properties of silicon nitride material.

Artur Oziębło Ph.D. Eng.