Hitachi Metals, Ltd.

Hitachi, Ltd.

Hitachi Medical Corporation

Hitachi Research Dev. Corp.

Yasuo Tsukuda

Hisao Hara

Hajime Yamamoto

Minoru Yoshida

Hiromichi Yamada

Kazuo Shiiki

Shigekazu Otomo

Katsuyuki Imoto

Kenji Maio

Tsuneo Suganuma

Mitsuhiro Kudo

Shinji Takayama

Yasunobu Ogata

Kenzo Susa

Iwao Matsuyama

Hideji Fujii

Hideki Harada

Atsushi Suzuki

Yoshizo Sawada

Yasuo Iizuka

A film resistor heater comprising a sprayed film resistor comprisng NiCr particles uniformly dispersed and partly contacted with each other in an insulating ceramic matrix. The film resistor heater may further comprise a bonding layer, an insulating layer and a protective layer. The film resistor heater is prepared by spraying, particularly plasma spraying. It may be used advantageously for home electric appliances such as hot plates, rice cookers and vacuum kettles, heat rolls for electrostatic copiers, etc.

Plasma sprayed film resistor heater

A radiation detector comprises a scintillator capable of emitting light by radiation and a photodetector for detecting the light emitted from the scintillator, the scintillator being composed of a sintered body prepared by sintering rare earth oxysulfide as a body starting material containing a densification additive by hot isostactic pressing. The sintered body has a high light output and a high density.

Radiation detector

An improved exhaust port assembly, for an internal combustion engine comprises a port pipe made of heat resistance steel covered by a fibrous ceramic sheet which is covered by an aluminum foil to prevent molten aluminum from penetrating the fibrous ceramic sheet when aluminum casting.

Exhaust port assembly

A ferromagnetic amorphous alloy having a composition represented by (Co.sub.x Ni.sub.y Fe.sub.z).sub.a M.sub.b G.sub.c, wherein M is Cr, Mo and/or W, G is Zr, Hf and/or Ti and x, y, z and a, b, c are selected to meet the conditions of x=1-y-z, 0.ltoreq.y.ltoreq.0.2, 0.ltoreq.z.ltoreq.0.7, a=1-b-c, 0.ltoreq.b.ltoreq.0.05 and 0.05.ltoreq.c.ltoreq.0.2 This amorphous alloy has a superior magnetic characteristic and a high thermal stability.

Ferromagnetic amorphous alloy

A method for producing an optical fiber preform comprising the steps of blowing, through at least one nozzle, gaseous material producing glass material soot by a CVD reaction to permit the glass material soot to be deposited on a target to produce a soot rod which grows in size, and heating and rendering transparent the soot rod produced in the first step, wherein a pipe is arranged substantially concentrically with the glass material soot so as to permit gas to flow through a clearance between the deposited glass material soot and the inner wall surface of the pipe in a direction in which the soot rod grows in size. The method makes it possible to prevent the outer peripheral portion of the soot rod from becoming porous and to satisfactorily control the diameter of the soot rod.

Method for producing optical fiber preform

Growing community of inventors

Ome, Japan

Yasuo Tsukuda