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:
May. 29, 2012
Filed:
Mar. 31, 2010
Mirza Abdul Oglu Kurbanov, Baku, AZ;
Azad Agalar Oglu Bayramov, Baku, AZ;
Nuru Arab Oglu Safarov, Baku, AZ;
Irada Sultanaxmed Gizi Sultanaxmedova, Baku, AZ;
Sevinj Nadir Gizi Musaeva, Baku, AZ;
Mirza Abdul oglu Kurbanov, Baku, AZ;
Azad Agalar Oglu Bayramov, Baku, AZ;
Nuru Arab Oglu Safarov, Baku, AZ;
Irada Sultanaxmed Gizi Sultanaxmedova, Baku, AZ;
Sevinj Nadir Gizi Musaeva, Baku, AZ;
Malaxit Co., Baku, AZ;
Abstract
An electret composite comprising a polymer matrix material that contains particles of a piezoelectric material with deep trapping centers on the interphase boundaries between the matrix and particles of a piezoelectric material. The piezoelectric material may have a tetragonal or a rhombohedral structure, and the polymer matrix material may be selected from high-density polyethylene, polyvinylidene fluoride, and a copolymer of vinylidenechloride and tetrafluoroethylene. The composite has a potential difference>500V, lifespan>10 years, dielectric permeability≧20, specific electric resistance≧10Ohm·m; provision of deep trapping centers on the interphase boundaries with activation energy in the range of 1 to 1.25 eV, and stable electret charge.