公开(公告)号：DE69317407D1

公开(公告)日：1998-04-16

申请号：DE69317407

申请日：1993-10-08

Applicant: TDK CORP

Inventor： YODOGAWA MASATADA ,  YAMAZAKI TOSHIYUKI ,  NAITOU HITOMI ,  FURUKAWA MASAHITO ,  MATSUOKA DAI

IPC: H01C7/112 ,  H01C7/10

Abstract: A ceramic resistor with a nonlinear voltage dependency comprising a ZnO-based sinter containing at least one rare earth element oxide, cobalt oxide, chromium oxide, at least one Group IIIb element oxide, at least one Group Ia element oxide, 0.01-2 at.% (in terms of Ca) of calcium oxide and 0.001-0.5 at.% (in terms of Si) of silicon oxide and having the atomic ratio of calcium to silicon ranging from 0.2 to 20, preferably from 2 to 6. Since this element has the above-specified atomic ratio (Ca/Si), it has an extremely long service life even under high-temperature and high-humidity conditions. Further it is reduced in the deterioration of asymmetry of the current-voltage relationship due to a difference in the direction of applying a direct current. When 0.05-10 at.% (in terms of Mg) of magnesium oxide is further added to the above composition, the above effects can be further enhanced and the grain growth is inhibited even when firing is conducted at a high temperature, with the result that the leakage current is reduced.

公开(公告)号：EP0862191A4

公开(公告)日：2000-01-19

申请号：EP97940366

申请日：1997-09-12

Applicant: TDK CORP ,  OKADA MASUO

Inventor： OKADA MASUO ,  SAWAGUCHI TAKAHIRO ,  YODOGAWA MASATADA ,  MATSUOKA DAI

IPC: H01C7/02 ,  H01C17/065

CPC classification number: C04B35/475 ,  C01G29/00 ,  C01G29/006 ,  C01P2002/54 ,  C01P2006/40 ,  C04B2235/3208 ,  C04B2235/3213 ,  C04B2235/3215 ,  C04B2235/3251 ,  C04B2235/3294 ,  C22C29/04 ,  C22C29/12 ,  C22C29/16 ,  H01C7/022 ,  H01C7/023 ,  H01C17/06553

Abstract: The PTC thermistor material of the invention comprises a matrix phase and electrically conductive phases substantially uniformly dispersed in the matrix phase, said conductive phases having a resistivity lower than that of the matrix phase, and has a resistivity changing sharply in the vicinity of the melting point of the conductive phases. The matrix phase is made up of any one of a polycrystalline ceramic material, a glass-polycrystalline ceramic composite material, a glass, a crystallized glass, and a polymer material, and the conductive phases are made up of a metal containing bismuth as a main component. It is thus possible to achieve a PTC thermistor material which can be controlled in terms of various properties such as the temperature at which PTCR property becomes available and the rate of resistivity change and so can be applied to circuit parts through which large currents pass in a normal operation state. Further, the PTC thermistor material can be easily manufactured with the stable PTCR property maintained. Furthermore, the PTC thermistor material can be operated with an increased rated current albeit being of small size, and has a high degree of shape freedom.

公开(公告)号：EP0748144A4

公开(公告)日：1999-03-10

申请号：EP95942279

申请日：1995-12-27

Applicant: TDK CORP

Inventor： SAWAMURA KENTARO ,  MITSUHASHI ETSUO ,  NANAO MASARU ,  MIKI NOBUYUKI ,  KITAJIMA MASAHIRO ,  YODOGAWA MASATADA

IPC: F23Q7/00 ,  H05B3/14

CPC classification number: H05B3/141 ,  F23Q7/001 ,  F23Q2007/004

Abstract: A rapid heating element is provided with a heating section (1) and a lead section (2). The heating section (1) is equipped with a heating section ceramic conductor. The heating-section conductor is composed of four or more heating-section conductive layers (1a) alternated with heating-section insulating layers (1c) and heating-section conductive layer connecting sections (1b) connecting the adjacent heating-section conductive layers (1a). The lead section (2) is equipped with a lead-section ceramic conductor which is composed of first and second lead-section conductive layers (2a and 2b), and a ceramic lead-section insulating layer (2c) sandwiched between the conductive layers (2a, 2b). Therefore, a highly durable rapid heating element which can be efficiently and inexpensively manufactured while maintaining its characteristics as a heating element can be provided.

公开(公告)号：DE69424478T2

公开(公告)日：2001-01-18

申请号：DE69424478

申请日：1994-07-19

Applicant: TDK CORP

Inventor： SAWAMURA KENTARO ,  MIKI NOBUYUKI ,  KITAJIMA MASAHIRO ,  MITSUHASHI ETSUO ,  YODOGAWA MASATADA ,  SATO SHINICHI ,  OKAMURA AKIO ,  KONDO RYOICHI

IPC: C04B35/117 ,  F23Q7/00 ,  H05B3/14 ,  C04B35/01

Abstract: A rectangular plate shaped rapid temperature rise heater element includes a sintered insulating ceramic layer, an exothermic section, and first and second lead layers for applying voltage across the exothermic section to develop heat. Typically the sintered insulating ceramic layer, exothermic section, and lead layers are formed of ceramic compositions composed mainly of an identical insulating component in the form of a metal oxide, typically Al2O3 and an identical conductive component in the form of a metal silicide and/or carbide, typically MoSi2, blended in different ratios for the respective layers. The heater element is easy and inexpensive to manufacture, capable of rapid heating, and durable.

公开(公告)号：DE69424478D1

公开(公告)日：2000-06-21

申请号：DE69424478

申请日：1994-07-19

Applicant: TDK CORP

Inventor： SAWAMURA KENTARO ,  MIKI NOBUYUKI ,  KITAJIMA MASAHIRO ,  MITSUHASHI ETSUO ,  YODOGAWA MASATADA ,  SATO SHINICHI ,  OKAMURA AKIO ,  KONDO RYOICHI

IPC: C04B35/117 ,  F23Q7/00 ,  H05B3/14 ,  C04B35/01

Abstract: A rectangular plate shaped rapid temperature rise heater element includes a sintered insulating ceramic layer, an exothermic section, and first and second lead layers for applying voltage across the exothermic section to develop heat. Typically the sintered insulating ceramic layer, exothermic section, and lead layers are formed of ceramic compositions composed mainly of an identical insulating component in the form of a metal oxide, typically Al2O3 and an identical conductive component in the form of a metal silicide and/or carbide, typically MoSi2, blended in different ratios for the respective layers. The heater element is easy and inexpensive to manufacture, capable of rapid heating, and durable.

公开(公告)号：DE3033511C2

公开(公告)日：1994-09-08

申请号：DE3033511

申请日：1980-09-05

Applicant: TDK CORP

Inventor： YODOGAWA MASATADA

IPC: H01C7/112 ,  H01C7/10

公开(公告)号：DE60011330T2

公开(公告)日：2005-06-23

申请号：DE60011330

申请日：2000-03-01

Applicant: TDK CORP

Inventor： HAMADA MUNEMITSU ,  TAKEISHI AKIRA ,  TAKAHASHI MAKOTO ,  MATSUOKA DAI ,  YODOGAWA MASATADA ,  HARADA HIRAKU

IPC: H01J1/14 ,  H01J1/142 ,  H01J1/15 ,  H01J1/20 ,  H01J1/28 ,  H01J1/30 ,  H01J17/04 ,  H01J29/04 ,  H01J31/12 ,  H01J37/06 ,  H01J61/067 ,  H01J61/06

Abstract: An electron-emitting electrode for discharge lamps etc. uses an electron-emitting material which contains a first metal component selected from Ba, Sr and Ca and a second metal component selected from Ta, Zr, Nb, Ti and Hf and also contains oxynitride perovskite. The electron-emitting material has restrained evaporation during electric discharge and a high resistance to ion sputtering.

公开(公告)号：DE60011330D1

公开(公告)日：2004-07-15

申请号：DE60011330

申请日：2000-03-01

Applicant: TDK CORP

Inventor： HAMADA MUNEMITSU ,  TAKEISHI AKIRA ,  TAKAHASHI MAKOTO ,  MATSUOKA DAI ,  YODOGAWA MASATADA ,  HARADA HIRAKU

IPC: H01J1/14 ,  H01J1/142 ,  H01J1/15 ,  H01J1/20 ,  H01J1/28 ,  H01J1/30 ,  H01J17/04 ,  H01J29/04 ,  H01J31/12 ,  H01J37/06 ,  H01J61/067 ,  H01J61/06

Abstract: An electron-emitting electrode for discharge lamps etc. uses an electron-emitting material which contains a first metal component selected from Ba, Sr and Ca and a second metal component selected from Ta, Zr, Nb, Ti and Hf and also contains oxynitride perovskite. The electron-emitting material has restrained evaporation during electric discharge and a high resistance to ion sputtering.

公开(公告)号：DE69317407T2

公开(公告)日：1998-08-06

申请号：DE69317407

申请日：1993-10-08

Applicant: TDK CORP

Inventor： YODOGAWA MASATADA ,  YAMAZAKI TOSHIYUKI ,  NAITOU HITOMI ,  FURUKAWA MASAHITO ,  MATSUOKA DAI

IPC: H01C7/112 ,  H01C7/10

Abstract: A ceramic resistor with a nonlinear voltage dependency comprising a ZnO-based sinter containing at least one rare earth element oxide, cobalt oxide, chromium oxide, at least one Group IIIb element oxide, at least one Group Ia element oxide, 0.01-2 at.% (in terms of Ca) of calcium oxide and 0.001-0.5 at.% (in terms of Si) of silicon oxide and having the atomic ratio of calcium to silicon ranging from 0.2 to 20, preferably from 2 to 6. Since this element has the above-specified atomic ratio (Ca/Si), it has an extremely long service life even under high-temperature and high-humidity conditions. Further it is reduced in the deterioration of asymmetry of the current-voltage relationship due to a difference in the direction of applying a direct current. When 0.05-10 at.% (in terms of Mg) of magnesium oxide is further added to the above composition, the above effects can be further enhanced and the grain growth is inhibited even when firing is conducted at a high temperature, with the result that the leakage current is reduced.

公开(公告)号：JP2003286023A

公开(公告)日：2003-10-07

申请号：JP2002089939

申请日：2002-03-27

Applicant: Tdk Corp ,  Tdk株式会社

Inventor： NAKANO TAKAHIRO ,  YODOGAWA MASATADA

IPC: C01B33/02

Abstract: PROBLEM TO BE SOLVED: To produce a compact silicon sintered body.
SOLUTION: Silicon powder of an average grain size ≤15 μm is held in the temperature region ≥1,100°C for the required time in non-oxidative atmosphere and, thereafter, is sintered while being subjected to a pressure ≥50 kgf/cm
2 . Thereby, the silicon sintered body of a relative density ≥90% can be obtained.
COPYRIGHT: (C)2004,JPO

Abstract translation: 要解决的问题：制造紧凑的硅烧结体。

解决方案：平均粒径≤15μm的硅粉末在非氧化性气氛中在≥1,100℃的温度范围内保持所需时间，然后在经受≥50kgf/ cm 2 。 由此，可以得到相对密度≥90％的硅烧结体。 版权所有（C）2004，JPO