Improved Aging Characteristics of NTC Thermistor Thin Films Fabricated by a Hybrid Sol–Gel–MOD Process |
| |
| Authors: | Dmitry A. Kukuruznyak Jerome G. Moyer Fumio S. Ohuchi |
| |
| Affiliation: | Department of Materials Science and Engineering, University of Washington, Seattle, Washington 98195 |
| |
| Abstract: | Negative temperature coefficient thermistor oxide thin films with improved aging characteristics are described. Better thermal stability has been achieved by incorporating sol–gel techniques with metallo-organic decomposition methods. A compositional range was identified whereby borosilicate may incorporate into the thermistor oxides, forming nanocomposites showing thermistor electrical characteristics. Thermistor thin films, with composition Ni0.48Co0.24Cu0.6Mn1.68O4·0.22SiO2·0.15B2O3 were deposited onto glass substrates from a solution containing organic transition metal salts, tetraethyl orthosilicate and triethyl borate. Electrical resistance measurements verified characteristic thermistor behavior. Nanocomposite thin films exhibited a factor of four improvement as compared with pure oxides after aging at 150°C for 500 h. |
| |
| Keywords: | |
|
|
