Mitsui Minings & Melting Co., Ltd.

Powdertech Co., Ltd.

Kenji Suzuoka

Isamu Yashima

Yasunori Tabira

Kazuhiko Kato

Hiromichi Kobayashi

Yuji Sato

Yoichi Kamikoriyama

Kazuya Kinoshita

Takeshi Gondo

Takashi Nakashima

Takashi Hikichi

Yoshihiro Yoneda

Yasuhide Yamaguchi

Akihiro Modeki

Satoshi Mogi

Mami Yoshida

Masahiko Nakano

Akira Aoki

These halogen-containing tin oxide particles have a BET specific surface area of 25-100 m/g and a crystallite diameter of 8-30 nm. The particles optimally contain 0.01-0.75 mass % halogen. Fluorine is optimally contained as the halogen. Optimally, the particles additionally contain tantalum, niobium, phosphorus, antimony, tungsten, or molybdenum. The volume resistivity is optimally 0.1-1000 &#x3a9;&#xb7;cm.

Halogen-containing tin oxide particles and production method thereof

A manganese oxide particle having a hexagonal crystal structure or an analogous hexagonal crystal structure with an a-axis length of 8.73&#xb1;1 &#x212b; and a c-axis length of 14.86&#xb1;1 &#x212b;. The manganese oxide particle is preferably produced by a process including mixing an aqueous solution containing manganese (II) and an organic compound having a hydroxyl group while in a heated state with an alkali.

Manganese oxide particles and process for producing same

Fluorine-doped tin oxide particles having a structure characterized by peaks at at least 123&#xb1;5 cm, 139&#xb1;5 cm, and 170&#xb1;5 cmin Raman spectroscopy. The particles preferably have additional Raman spectral peaks at 78&#xb1;5 cm, 97&#xb1;5 cm, 109&#xb1;5 cm, 186&#xb1;5 cm, and 207&#xb1;5 cm. The particles preferably have a specific surface area of 10 to 300 m/g.

Fluorine-doped tin-oxide particles and manufacturing method therefor

A tin oxide particle having a structure characterized by peaks in Raman spectroscopy at at least 37&#xb1;9 cm, 57&#xb1;9 cm, 97&#xb1;9 cm, 142&#xb1;9 cm, 205&#xb1;9 cm, 255&#xb1;9 cm. The tin oxide particle preferably has an infrared transmittance of 80% or less at a wavelength of 1500 nm. The tin oxide particle preferably exhibits electroconductivity. The tin oxide particle is preferably substantially free from a dopant element that develops electroconductivity.

Tin oxide particles and method for producing same

A tin oxide particle having at least two diffraction peaks at 2&#x3b8; (deg) of 9&#xb1;1&#xb0; and 28&#xb1;1&#xb0; in XRD measurement by Cu/K&#x3b1; radiation. The tin oxide particle preferably shows diffraction peaks at 2&#x3b8; (deg) of 19&#xb1;1&#xb0;, 48&#xb1;1&#xb0;, and 59&#xb1;1&#xb0;. The tin oxide particle preferably has electroconductivity. The tin oxide particle is preferably produced by mixing an aqueous solution containing tin (II) and a hydroxyl-containing organic compound in a heated condition with an alkali.

Tin oxide particles and process for producing the same

A carrier for electrophotographic developer comprises a resin carrier core comprising a binder resin and magnetic powder dispersed in the binder resin, and a coating layer comprising a coating resin on a surface of the core, the binder resin being a silicone resin obtained by curing of a polysiloxane compound (A) having an epoxy group and a polysiloxane compound (B) having a group capable of reacting with the epoxy group, due to a ring-opening addition reaction; the binder resin containing a functional group which is an epoxy group and/or a group capable of reacting with an epoxy group; the coating resin containing a functional group capable of reacting with the functional group of the binder resin; the functional group of the coating resin and the function group of the binder resin forming a chemical bond.

Carrier for electrophotographic developer and two-component electrophotographic developer

Provided are a carrier for electrophotography developers prepared by generating a slight amount of byproducts such as water, alcohol, etc, which carrier is free from release of a magnetic powder, has excellent mechanical strength and durability, and good environmental stability, and further can restrain occurrence of toner spent condition and has favorable fluidity and excellent capability of imparting charging to a toner, a two-component developer comprising the carrier and a method for forming an image using the developer. The carrier for electrophotography developers comprises a magnetic powder dispersed binder resin, the binder resin material comprises (A) a polysiloxane compound having an epoxy group as a functional group and (B) a polysiloxane compound having a group capable of ring-opening addition reaction with the epoxy group of the polysiloxane compound (A), and the binder resin is a silicone resin prepared by curing with ring-opening addition reaction of the epoxy resin. The developer comprises the carrier for electrophotography developers and the toner particle. The method for forming an image comprises developing a static latent image by the developer with an alternating electric field.

Carrier for electrophotography developers, developer prepared by using the carrier and method for forming image

A zinc oxide fine particle-adhered composite material consists essentially of a substrate and zinc oxide fine particles adhered thereto. The composite material is characterized in that the zinc oxide fine particles deposited, from an aqueous medium, on the surface of the substrate are firmly adhered to the surface without using any binder and the zinc oxide fine particles are substantially exposed on the surface. The composite material is prepared by, for instance, a method which comprises the step of coming an aqueous suspension of zinc oxide fine particle in contact with a substrate to thus deposit the zinc oxide fine particles on the surface of the substrate. The composite material allows for the zinc oxide particles to sufficiently show their antibacterial, deodorizing, UV absorbing, photocatalytic, stain-proofing and purifying activities without any delay.

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Saitama, Japan

Kenji Suzuoka