Chemistry of inorganic compounds – Phosphorus or compound thereof – Halogen containing
Patent
1988-04-12
1989-08-08
Heller, Gregory A.
Chemistry of inorganic compounds
Phosphorus or compound thereof
Halogen containing
423305, 423307, 423311, C01B 2510
Patent
active
048551180
ABSTRACT:
A method of producing fluorapatite wherein predetermined amounts of calcium monohydrogen phosphate, calcium carbonate, and calcium fluoride are weighed, subjected to a mechanochemical action, and caused to react with one another in water. With this method, a fluorapatite having a uniform composition can be obtained without the accompaniment of by-products. A moisture sensitive resistor of the present invention can be obtained by sintering the fluorapatite produced in accordance with this method. This moisture sensitive resistor has a sufficiently low resistance corresponding to a humidity, and has substantially no hysteresis.
REFERENCES:
patent: 2553595 (1951-05-01), Maier
patent: 4157378 (1979-06-01), Tomlinson et al.
Mitsubishi Denki Giho, vol. 56, No. 2, 1982, pp. 23-36.
Kogyo Kagaku Zasshi (Industrial Chemical Magazine), vol. 71, No. 9, (1986), p. 1307.
Ichinose Noboru
Tanaka Hirohumi
Heller Gregory A.
Nichia Kagaku Kogyo K.K.
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