公开(公告)号：US20210028538A1

公开(公告)日：2021-01-28

申请号：US17045582

申请日：2019-04-05

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Ronald D. JESME ,  Jaewon KIM ,  Stephen J. ETZKORN ,  Dipankar GHOSH ,  Mohsen SALEHI ,  Guanglei DU ,  John A. WHEATLEY

IPC: H01Q1/42 ,  C08F220/10 ,  C08K7/28 ,  C08K3/40 ,  C08J5/18 ,  C09J7/24 ,  C09J11/04

Abstract: Gradient permittivity films are described. In particular, gradient permittivity films that include a first continuous matrix of a first component having a first relative permittivity and a second component disposed within the continuous matrix having a second relative permittivity. The first permittivity is greater than the second permittivity for at least one wavelength between 20 GHz and 300 GHz. Such films may be useful in improving the signal to noise ratio for transmitting and receiving units behind a protective cover.

公开(公告)号：US20230395326A1

公开(公告)日：2023-12-07

申请号：US18246527

申请日：2021-08-31

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Gunther A.J. STOLLWERCK ,  Dipankar GHOSH

IPC: H01G4/12 ,  H01G4/10 ,  H01G4/20 ,  G01R15/06

CPC classification number: H01G4/1245 ,  H01G4/10 ,  H01G4/206 ,  G01R15/06

Abstract: A high voltage capacitor for a voltage divider is described that is configured to sense an elevated voltage for medium and high voltage electrical distribution networks. The high voltage capacitor comprises a high voltage electrode, a measurement electrode, and an dielectric material disposed between the high voltage and measurement electrodes, wherein the dielectric material consists essentially of lanthanum oxide-zirconium oxide-titanium oxide (LZT) glass filler disposed in an insulating polymer matrix such that the capacitance of the dielectric material does not vary by more than +/−0.5% in the temperature range of −20° C. to 60° C.

公开(公告)号：US20160218498A1

公开(公告)日：2016-07-28

申请号：US14917573

申请日：2014-09-15

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Dipankar GHOSH

IPC: H02G15/064

CPC classification number: H02G15/184 ,  C08K3/011 ,  C08K3/042 ,  C08K3/22 ,  C08K3/24 ,  C08K2003/2265 ,  C08K2003/2275 ,  C08K2201/001 ,  C08K2201/01 ,  C08K2201/016 ,  H01B3/002 ,  H02G15/064 ,  C08L83/00

Abstract: Compositions comprising ferrosoferric oxide dispersed in a polymer matrix. Such compositions may exhibit properties suitable for achieving both resistive field grading effects and capacitive field grading effects e.g. in electrical stress control devices and surge arrestor devices. Such compositions may optionally include one or more capacitive field grading additives and/or conductive additives.

Abstract translation: 包含分散在聚合物基质中的铁铁素体的组合物。 这样的组合物可以表现出适合于实现电阻场分级效应和电容场分级效应两者的性质。 在电应力控制装置和电涌放电器装置中。 这样的组合物可任选地包括一种或多种电容场分级添加剂和/或导电添加剂。