Showa Denko K.k.

Hitachi, Ltd.

Asahi Kasei Medical Co., Ltd.

Umicore

Daisuke Miyamoto

Satoru Inoue

Yoshikuni Sato

Yasuaki Wakizaka

Kunihiko Miyazaki

Naoki Hayashi

Yoshiaki Isobe

Yoko Hashimoto

Eiji Kambara

Kosuke Anzai

Natsuki Watanabe

Kosuke Shioi

Tomohisa Kumagai

An aluminum nitride sintered compact containing aluminum nitride crystal grains and composite oxide crystal grains containing a rare earth element and an aluminum element, wherein a median diameter of the aluminum nitride crystal grains is 2 &#x3bc;m or less; 10 to 200 intergrain voids having a longest diameter of 0.2 to 1 &#x3bc;m are dispersed in a region of a cross section of 100 &#x3bc;m in square; and the carbon atom content is less than 0.10% by mass. Also disclosed is a method of producing the aluminum nitride sintered compact.

Aluminum nitride sintered compact and method for producing same

Provided is a biological fluid-treating filter for treating a biological fluid containing erythrocytes, which has a matrix and a polymer retained by the matrix, the polymer having a zwitterion-containing functional group and a basic nitrogen-containing functional group. By using the filter in which the polymer has the zwitterion-containing functional group and the basic nitrogen-containing functional group, it is possible to treat the biological fluid containing erythrocytes without adversely affecting the erythrocytes.

Biological fluid-treating filter and filter device

A method for producing a graphite powder for a negative electrode of a lithium ion secondary battery, including a process of graphitizing a mixture of a carbon raw material powder and a silicon carbide powder, wherein a 90% particle diameter in a volume-based cumulative particle size distribution by laser diffraction method, D, is 1 to 40 &#x3bc;m, a silicon carbide content in a total mass of a carbon raw material and silicon carbide (mass of silicon carbide/total mass of the carbon raw material and silicon carbide) is 1 to 35 mass %, the ratio of a 50% particle diameter in a volume-based cumulative particle size distribution by laser diffraction method, D, of the carbon raw material powder to Dof silicon carbide powder (Dof the carbon raw material powder/Dof silicon carbide powder) is 0.40 to 4.0.

Method for producing graphite powder for negative electrode materials for lithium ion secondary batteries

A data authenticity assurance method carried out by a management computer including: a first step of receiving the first data piece from the computer; a second step of selecting a plurality of second data pieces at predetermined intervals in chronological order from among the plurality of second data pieces held in the data holding part; a third step of performing an arithmetic operation for each of the hash values of the selected plurality of second data pieces; a fourth step of generating signature target data by combining the first data piece received from the computer with the hash values of the selected plurality of second data pieces; and a fifth step of generating a second data piece by assigning the digital signature to the signature target data by using the preset key, and holding the generated second data piece in chronological order sequentially in the data holding part.

Data authenticity assurance method, management computer, and storage medium

A method of producing carbon fibers, in which the producing method comprises allowing a supported type catalyst and a carbon atom-containing compound to come in contact with each other in a heating zone, wherein the supported type catalyst is prepared by a method comprising impregnation of a powdery carrier with colloid containing catalyst to support particles of the catalyst on the powdery carrier having a specifically developed crystal plane such as a powdery carrier being 4 or more in the ratio (I/I) of the intensity Iof the strongest peak to the intensity Iof the second strongest peak observed in X-ray diffraction, or a powdery carrier having the ratio (I/I) of the intensity Iof the strongest peak to the intensity Iof the second strongest peak observed in X-ray diffraction of 1.5 times or more the ratio (I/I) of the intensity Iof the strongest peak to the intensity Iof the second strongest peak described in JCPDS. A composite material is prepared by blending the carbon fibers prepared by the method with, for example, a resin.

Method of producing carbon fiber

Growing community of inventors

Tokyo, Japan

Daisuke Miyamoto