Thick film paste preparation and characterization of BaTiO3 for humidity sensor
A dielectric material of BaTiO3 powder was prepared using solid state reaction from raw materials; BaCO3 and TiO2. A study was conducted to prepare the BaTiO3 thick film paste by mixing the organic vehicle and the sintered powder in ratio of 30:70. The organic vehicle was formed from suspending ethy...
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| Main Authors: | , , , |
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| Format: | Conference or Workshop Item |
| Subjects: | |
| Online Access: | http://eprints.uthm.edu.my/2736/ http://eprints.uthm.edu.my/2736/1/46.pdf |
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| Summary: | A dielectric material of BaTiO3 powder was prepared using solid state reaction from raw materials; BaCO3 and
TiO2. A study was conducted to prepare the BaTiO3 thick film paste by mixing the organic vehicle and the
sintered powder in ratio of 30:70. The organic vehicle was formed from suspending ethyl cellulose resins into
terpineol solvent in a specific ratio. The paste was printing onto ceramic substrate by using DEK J1202 thick
film screen printer machine. The recipe and the process in producing BaTiO3 thick film paste was then
established. The electrical properties of screen-printed BaTiO3 were investigated in an interdigitated electrode
pattern. Experimental results show that the smaller gap between two adjacent electrodes gives higher
capacitance and lower resistance value, thus provide better response time in detecting capacitor changes for
sensor application. An equivalent circuit to represent the dialectic mechanism of the BaTiO3 thick film sample
has also been established. |
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