To obtain well defined channels and cavities in LTCC structures without deformation so called sacrificial layers based on carbon are often used. A ceramic micro-processor for making the hydrogen rich gasses from liquid fuels (mainly methanol was designed and realised. The LTCC technology with a carbon based for sacrificial layers was used to prepare prototypes of the fuel processor. It consists of two evaporators for fuel and water, a mixing chamber and nearly 2 m of buried micro channels where the reactions take place
B.03 Paper at an international scientific conference
COBISS.SI-ID: 22891559The thick-film temperature sensors were screen-printed and fired on alumina and LTCC substrates. . Micro structural investigations of cross-sections of thermistors on LTCC substrates indicate significant interactions between glassy LTCC substrates and films. The sheet resistivities, temperature coefficients of resistivity and noise indices of the thermistors fired on LTCC substrates as compared to films fired on alumina significantly increased. These results must be taken into consideration when designing thick film temperature sensors in LTCC structure
B.03 Paper at an international scientific conference
COBISS.SI-ID: 21793831To obtain 3D LTCC strutures with buried cavities without delamination and deformation during lamination and firing so called sacrificial layers based on carbon are often used. The sacrificial materials, either pastes or tapes, were evaluated. The thermo gravimetrical analysis (TGA) was used to establish the starting temperatures of oxidation and burn-out profiles.
F.09 Development of a new technological process or technology
COBISS.SI-ID: 21702183To obtain buried structures iwith LTCC technology sacrificial layers are often used. The sacrificial material based on graphite, either pastes or tapes were evaluated. The thermo gravimetrical analysis (TGA) was used to establish the starting temperatures of oxidation and burn-out profiles. Some preliminary results obtained with test structures for buried cavities in 3D LTCC structures are presented
B.03 Paper at an international scientific conference
COBISS.SI-ID: 22022439Piezoresistive and piezoelectric thick film sensor elements fore on different LTCC structures were evaluated. The results were compared with results obtained on relatively inert alumina ceramics. The electrical and piezoresistive characteristics of resistors as well as the dielectric and piezoelectric characteristics of the PZT films fired on the LTCC substrates changed due to interactions between glassy LTCC and sensing films. However, results indicated that both resistor and PZT layers can be used as sensors in LTCC structures
B.03 Paper at an international scientific conference
COBISS.SI-ID: 22677799