Title:
ZINC OXIDE VARISTOR AND METHOD FOR MANUFACTURING SAME
Document Type and Number:
WIPO Patent Application WO/2018/105689
Kind Code:
A1
Abstract:
Provided is a zinc oxide varistor manufacturing method which, focusing on zinc oxide per se as a main raw material of a zinc oxide varistor (multilayer varistor), comprises adding a predetermined amount of additive to a zinc oxide powder having, for example, a crystallite size of 20 to 50 nm, a particle diameter according to a specific surface area BET method of 15 to 60 nm, an untamped density of 0.38 to 0.50 g/cm3, and a tap density of 0.50 to 1.00 g/cm3. In this way, a zinc oxide varistor can be provided in which uniformity, high compactness, and high electric conductivity are ensured in a zinc oxide sintered body, and which has high surge withstand capability.
More Like This:
Inventors:
GOMI YOJI (JP)
IGUCHI KENICHI (JP)
UDAGAWA ETSUO (JP)
ECHIZENYA YUKO (JP)
NAKADA TAMAMI (JP)
IGUCHI KENICHI (JP)
UDAGAWA ETSUO (JP)
ECHIZENYA YUKO (JP)
NAKADA TAMAMI (JP)
Application Number:
PCT/JP2017/043953
Publication Date:
June 14, 2018
Filing Date:
December 07, 2017
Export Citation:
Assignee:
KOA CORP (JP)
JFE MINERAL CO LTD (JP)
JFE MINERAL CO LTD (JP)
International Classes:
H01C7/112
Foreign References:
| JPS58124204A | 1983-07-23 | |||
| JP2001220136A | 2001-08-14 | |||
| JP2008218749A | 2008-09-18 | |||
| JP2013189369A | 2013-09-26 | |||
| JP2012025619A | 2012-02-09 |
Attorney, Agent or Firm:
MARUYAMA Yukio (JP)
Download PDF: