The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 13, 2011
Filed:
Apr. 22, 2009
James M. Wilson, North Adams, MA (US);
James M. Wilson, North Adams, MA (US);
MRA Laboratories, Inc, Adams, MA (US);
Abstract
A bismuth sodium titanate (BiNaTiO) base material is modified by the partial substitution of aliovalent A-site cations such as barium (as BaO) or strontium (as SrO), as well as certain b-site donor/acceptor dopants and sintering aids to form a multi-phase system, much like known 'core/shell' X7R dielectrics based solely on BaTiO. The resulting ceramic dielectric composition is particularly suitable for producing a multilayer ceramic capacitor () that maintains high dielectric constant (and thus the capability of maintaining high capacitance) over a broad temperature range of from about 150° C. to about 300° C. Such capacitors () are appropriate for high temperature power electronics applications in fields such as down-hole oil and gas well drilling.