Emilia Pietrzak, Paulina Wiecinska, Emilia Pawlikowska, Mikolaj Szafran
Investigations of thermal stability and decomposition of green bodies
The paper presents the analysis of thermal stability and decomposition of AlO and (Ba,Sr)TiO green bodies as well as commercially available organic additives which are used in shaping of ceramics by colloidal processing. The first analyzed ceramic material was AlOgreen body obtained by gelcasting. The second examined material was elastic ceramic–polymer composite based on ferroelectric powder BaSrTiO with NiO obtained by tape casting method. This flexible and durable material is characterized by high value of dielectric constant and finds the application in devices operating at very high frequencies up to sub-THz. Most organic additives are indispensable just in forming step but must be then eliminated in order to obtain pure ceramic phase, additionally some of them have to be stable in a wide temperature range. The analyzed organic substances were as follows: 2-carboxyethyl acrylate, SYNTRAN 8250, DURAMAX D-3005, DURAMAX B-1000. The DTA/TG measurements coupled with mass spectrometry allowed to gain new knowledge concerning degradation of selected organic additives, thermal stability of ceramic–polymer composite and type of gases released from samples during thermal treatment.