Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1987-05-08
1988-08-23
Valentine, Donald R.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
20419215, 20419222, 20419223, 148 627, 156665, 427343, 4274192, C25F 320, C23C 1416, C23C 1434, C23C 2256
Patent
active
047658703
ABSTRACT:
The present invention relates to a method of manufacture of an electric moisture-content sensor comprising a porous layer of alumuniumoxihydroxide, the so-called boehmite, obtained by hydration of an aluminium substrate in boiling redistilled water and subsequent passivating tempering.
This method, due to its simplicity, results in a larger yield in manufacture, reduced variations of parameters of individual sensors and a higher stability of their calibration curves.
Due to the extraordinary prolonged stability of sensors manufactured according to this method, they can be for example applied for measuring of the moisture content of stored goods, for air-conditioning systems, for drying plants, in meteorology and also for microelectronics and in medicine.
REFERENCES:
patent: 3574681 (1971-04-01), Cecil
patent: 3900370 (1975-08-01), Germscheid et al.
patent: 4144636 (1979-03-01), Burkhardt et al.
patent: 4204919 (1980-05-01), Randall, Jr. et al.
patent: 4470885 (1984-09-01), Randall, Jr. et al.
Emmer Ivan
Hajek Zdenek
Repa Petr
Matematicko-Fyzikalni Fakulta University
Valentine Donald R.
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