Ternary niobate dielectric compositions

Details Ternary niobate dielectric compositions Ternary niobate dielectric compositions

1978-05-01

1981-08-11

Pitlick, Harris A.

Electricity: electrical systems and devices

Electrostatic capacitors

Fixed capacitor

29 2542, 106 395, 106 732, H01G 412, H01B 312

Patent

active

042837529

ABSTRACT:
A dielectric material which meets the temperature requirements for X7R grade capacitors consists of a fired ternary niobate composition. A dielectric constant of at least 2000 and a limited change in dielectric constant with temperature is present in compositions having the approximate formula:

REFERENCES:
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patent: 3600652 (1971-08-01), Riley
patent: 3635759 (1972-01-01), Howatt
Edelman, "Some Properties of Thick Film Niobate Capacitors", Proceedings of The 1970 Electronic Components Conference, Wash, D.C. (May 13-15, 1970), pp. 40-45.
Smolenskii et al., "Ferroelectric Properties of Solid Solutions in the System P3Nb.sub.2 O.sub.6 -BaNb.sub.2 O.sub.6 -SrNb.sub.2 O.sub.6 ", Soviet Physics-Solid State, vol. 1, p. 400, et S22, (1959).
Subbarao et al., "Nonstoichiometry and Ferroelectric Properties of PbNb.sub.2 O.sub.6 -Type Compounds", J. Chem. Phys. (6), pp. 1846-1851, Jun. 1960.
Anan'Eva et al., Soviet Physics-Acoustics, vol. 10, No. 3, Jan.-Mar. 1965, pp. 227-231.
Mikhaycov et al., "Electrical Properties of Some Solid Solutions of Niobates and Tantalates of Divalent Metals", 12V Akad Nauk USSR, Ser. F12.24, pp. 1282-1284, (1970).

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