The present study deals with the tape casting of NiMn2O4 for the fabrication of chip thermistors. Dispersion behaviour of the negative temperature coefficient (NTC) powder in toluene–ethanol medium was studied by rheological characterisation. The influence of process parameters such as drying conditions, casting speed and blade gap on the properties and quality of green tapes were investigated. A critical cracking thickness was determined and the effect of the solvent rich atmosphere on drying behaviour was analysed by weight loss measurements.
BuchnanR. C.: ‘Ceramic materials for electronics, processing, properties and applications’, 272–301; 1991, New York, Marcel Dekker Inc.
3.
MistlerR. E. and TwinameE. R.: ‘Tape casting — theory and practice’: 2000, New York, The American Ceramic Society.
4.
RamanathanS., KrishnakumarK. P., DeP. K. and BanerjeeS.: J. Mater. Set, 2004, 39, (10), 3339–3343.
5.
KristofferssonA.: Water-based tape casting of ceramics and fabrication of ceramic laminates’, PhD thesis, Department of Ceramic Technology, Chalmers University of Technology, Sweden, 1999.
6.
ReddyS. B., SinghP. P., RaghuN. and KumarV.: J. Mater. Sci., 2002, 37, 929–934.
7.
KrishnanB. and NatarajanR.: J. Mater. Sci., 2005, 40, 5511–5516.
8.
OlieveriaI. R., SepulvedaP. and PandolfelliV. C.: Am. Ceram. Soc. Bull, 2001, 80, (2), 47–53.
9.
ScherrerG. W.: J. Am. Ceram. Soc., 1990, 73, (1), 3–14.
10.
LewisJ. A.: J. Am. Ceram. Soc., 2000, 83, (10), 2341–2359.
11.
LewisJ. A., BlackmanK. A., OgdenA. L.: J. Am. Ceram. Soc., 1996, 79, (12), 3225–3234.