CALCIUM TITANATE POWDER, METHOD FOR PRODUCING SAME AND EXTERNAL TONER ADDITIVE FOR ELECTROPHOTOGRAPHY

Title:

CALCIUM TITANATE POWDER, METHOD FOR PRODUCING SAME AND EXTERNAL TONER ADDITIVE FOR ELECTROPHOTOGRAPHY

Document Type and Number:

WIPO Patent Application WO/2020/017419

Kind Code:

A1

Abstract:

A powder which is composed of particles that are mainly composed of calcium titanate having a perovskite crystal structure, and primary particles of which have a generally spherical shape and an average particle diameter within the range of from 20 nm to 100 nm (inclusive). This powder is produced by a method which comprises: the production of calcium titanate by subjecting a mixed liquid that contains a sugar, an alkali, a water-soluble compound containing calcium, and a compound which is obtained by deflocculating a hydrolysis product of a titanium compound with use of a monobasic acid to a high-pressure liquid-phase reaction that includes heating to a temperature of from 100°C to 270°C (inclusive); and a subsequent calcium removal treatment.

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Inventors:

SEKI TOSHIMASA (JP)
TANAKA TAKAYASU (JP)
MINO WATARU (JP)
KOGA TOSHIYUKI (JP)
YOSHIMI TOMOKO (JP)

Application Number:

PCT/JP2019/027430

Publication Date:

January 23, 2020

Filing Date:

July 11, 2019

Export Citation:

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Assignee:

TITAN KOGYO KK (JP)

International Classes:

C01G23/00; G03G9/097

Domestic Patent References:

WO2004103900A1

2004-12-02

Foreign References:

JP2013025223A	2013-02-04
JP2009192696A	2009-08-27
JP2009540067A	2009-11-19
CN102139914A	2011-08-03
JP2013177259A	2013-09-09
JP2012251082A	2012-12-20
JP2018155912A	2018-10-04
CN108530057A	2018-09-14
JPS5945927A	1984-03-15
JP2004323344A	2004-11-18
JP2008297142A	2008-12-11

Other References:

MAO. Y. ET AL.: "Composition and Shape Control of Crystalline Ca1-xSrxTiO3 Perovskite Nanoparticles", ADVANCED MATERIALS, vol. 17, 3 August 2005 (2005-08-03), pages 2194 - 2199, XP55675688, DOI: 10.1002/adma.200500437
See also references of EP 3825281A4

Attorney, Agent or Firm:

ONO, Shinjiro et al. (JP)

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