Alumina substrates 1 Aluminum oxide 1 Bismuth compounds 1 Conductive films 1 Conductive pastes Film preparation 1 Glass 1 Glassy matrix 1 II-VI semiconductors 1 Micrographite particle 1 Pb-free 1 Piezo-resistive 1 Piezoresistive materials 1 Piezoresistive sensors 1 Sensor response 1 Silica 1 Sintering 1 Sintering temperatures 1 Substrates 1 Thick films 1 Zinc oxide 1 conductive paste 1 glassy matrix 1 micrographite particles 1 piezoresistive material 1 thick film 1