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Featured researches published by Makoto Okaji.


The Imaging Science Journal | 1988

An Empirical Rule to Modify the Crystal Habit of Silver Chloride to Form Tabular Grains in an Emulsion

Kazunaka Endo; Makoto Okaji

AbstractThe purpose of this study is to indicate an empirical rule to form tabular silver chloride grains, in double-jet precipitations, which controls the growth, form and morphology of the crystals. This rule relates intrinsic conditions (formation constants, bond-nature (electronegativity), molecular size (ionic or molecular radii) and number of points of attachment (denticity) of the silver ligands added as impurities to silver chloride) to the production of tabular grains. The rule was examined by adding various silver ligands (CN-, SCN-, 1-, S2O32-, SO32-, thiourea and its derivatives) to excess Cl- aqueous solution. Thus, the silver chloride tabular grains were found to be produced in the case of adding SCN-, thiourea and its derivatives (methyl-thiourea, ethyl-thiourea, N,N’.dimethyl thiourea and N,N’diethyl thiourea). Especially, we obtained the high aspectratio tabular crystals with [111] faces, for silver chloride grai/ls involving N,N’-dimethyl and N,N’.diethyl thiourea.


Archive | 1990

Electrophotographic photoreceptor with stilbene compound

Akira Itoh; Kozo Haino; Makoto Okaji; Kazuhiro Emoto; Tatsuya Kodera


Archive | 2000

Phthalocyanine, process for producing the same and electrophotographic photoreceptor using the same

Tamotsu Horiuchi; Hideki Nagamura; Makoto Okaji


Archive | 1999

PHTHALOCYANINE COMPOSITION, ITS PRODUCTION AND ELECTROPHOTOGRAPHIC PHOTORECEPTOR PREPARED BY USING THE SAME

Tamotsu Horiuchi; Makoto Okaji; 保 堀内; 誠 岡地


Archive | 1994

Production of undercoating liquid for electrophotographic photoreceptor and electrophotographic photoreceptor using same

Hideya Arisue; Nobuaki Hirota; Makoto Okaji; 誠 岡地; 展章 廣田; 英也 有末


Archive | 1999

Oxytitanium phthalocyanine process for the production thereof and electrophotographic photoreceptor to which the oxytitanium phthalocyanine is applied

Makoto Okaji; Michihiko Sato; Kazuyuki Suruga; Tamotsu Horiuchi


Archive | 1990

NOVEL HYDRAZONE COMPOUND IN AN ELECTROPHOTOGRAPHIC RECEPTOR

Kozo Haino; Akira Itoh; Makoto Okaji; Kazuhiro Emoto; Tatsuya Kodera; Kazuchiyo Takaoka


Archive | 2001

Phthalocyanine composition, process for production thereof, and electrophotographic photoreceptor

Tamotsu Horiuchi; Hideki Nagamura; Makoto Okaji


Archive | 1993

Production of titanium oxide dispersion

Hideya Arisue; Makoto Okaji; 誠 岡地; 英也 有末


Archive | 1990

Electrophotographic photoreceptor with bisazo compound

Kazuhiro Emoto; Kozo Haino; Akira Itoh; Makoto Okaji

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