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1. 发明专利

JP2004292197A Method of manufacturing honeycomb structure 审中-公开
标题翻译：蜂窝结构的制造方法
公开(公告)号：JP2004292197A
公开(公告)日：2004-10-21
申请号：JP2003084348
申请日：2003-03-26
申请人： Ngk Insulators Ltd , 日本碍子株式会社
发明人： MUROI YUMI , YAMAMOTO YOSHINORI , WADA YUKIHISA , ICHIKAWA SHUICHI
IPC分类号： B01D39/00 , B01D39/20 , B01D46/00 , B01D46/24 , B01J27/224 , B01J35/04 , C04B35/00 , C04B35/565 , C04B35/64 , C04B38/00
CPC分类号： C04B35/565 , B01D39/2075 , B01D46/0001 , B01D46/2418 , B01J35/04 , C04B38/0006 , C04B2111/00793 , C04B2111/0081 , C04B2235/3205 , C04B2235/428 , C04B2235/5436 , C04B2235/80
摘要： PROBLEM TO BE SOLVED: To decrease the pressure loss of a manufactured honeycomb structure and to reduce cost by the improvement of durability of a furnace material. SOLUTION: The honeycomb structure is manufactured by forming a green body obtained by mixing metal silicon, an organic binder and an alkaline earth metal with a silicon carbide powder raw material and kneading into a prescribed shape, calcining the shaped body 1 to remove the organic binder and carrying out final firing. The final firing is performed by placing a solid body 3 containing aluminum in the silicon carbide-based furnace material 2. In the final firing, aluminum evaporated from the solid body 3 is stuck on the surface of the silicon carbide particle of the body 1 to be fired to form an oxide phase composed of aluminum oxide, the alkaline earth metal and metal silicon and as a result, the wettability of the metal silicon is improved and the pressure loss of the honeycomb structure after fired is decreased. COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了降低制造的蜂窝结构体的压力损失并且通过提高炉材料的耐久性来降低成本。解决方案：通过将金属硅，有机粘合剂和碱土金属与碳化硅粉末原料混合并捏合成规定的形状，煅烧成形体1以除去有机粘合剂并进行最终焙烧。通过将含有铝的固体3放置在碳化硅系炉料2中来进行最终烧成。在最终烧成中，从固体3蒸发的铝被粘贴在本体1的碳化硅粒子的表面上，焙烧形成由氧化铝，碱土金属和金属硅构成的氧化物相，结果，金属硅的润湿性提高，烧成后的蜂窝结构体的压力损失降低。版权所有（C）2005，JPO＆NCIPI

2. 发明专利

JPH06251853A SEMICONDUCTOR TYPE LIGHTNING ARRESTING DEVICE 失效
公开(公告)号：JPH06251853A
公开(公告)日：1994-09-09
申请号：JP3196693
申请日：1993-02-22
申请人： NGK INSULATORS LTD
发明人： ICHIOKA TATSUMI , YAMAMOTO YOSHINORI , TANGE MASAJI
IPC分类号： H01T2/00 , H01T15/00 , H02H9/04
摘要： PURPOSE:To protect a power system from a thunderbolt without breaking an element even when a lightning attack with large energy is received. CONSTITUTION:A semiconductor switch circuit 2 utilizing a thyristor element 3 and a nonlinear resistant element 4 are connected in parallel to each other, whereby the build-up part of a lightning current is discharged through the nonlinear resistant element 4, and the following part is discharged through the thyristor element 3. Thus, the characteristics of the respective elements are effectively utilized, and even when a long-wave lightning attack with large energy is received, a power system can be protected from a thunderbolt while preventing the linear resistance element from being broken thereby.

3. 发明专利

JPH06165369A SEMICONDUCTOR TYPE LIGHTNING ARRESTOR 失效
公开(公告)号：JPH06165369A
公开(公告)日：1994-06-10
申请号：JP30542992
申请日：1992-11-16
申请人： NGK INSULATORS LTD
发明人： ICHIOKA TATSUMI , YAMAMOTO YOSHINORI , HATANO TATSUHIKO
IPC分类号： H02H9/06
摘要： PURPOSE:To provide a semiconductor type lightning arrestor which prevent malfunction by electric noise by omitting a gate signal generating circuit. CONSTITUTION:A semiconductor switch circuit 3 consisting of a photothyristor 4 is connected in series with a gap 2. A light transmitting path 6 consisting of, for example, an optical fiber is provided between the photothyristor 4 and the gap 2, and the light of gap discharge by the overvoltage at lightning is introduced into the gate of the photothyristor 4 so as to trigger the photothyristor. Hereby, the semiconductor switch circuit 3 is turned on, and the system is earthed.

4. 发明专利

JP2004059357A Method of producing porous ceramic body 有权
公开(公告)号：JP2004059357A
公开(公告)日：2004-02-26
申请号：JP2002217941
申请日：2002-07-26
申请人： Ngk Insulators Ltd , 日本碍子株式会社
发明人： MUROI YUMI , YAMAMOTO YOSHINORI , WADA YUKIHISA
IPC分类号： C04B38/06 , B01D39/20 , C04B35/636 , C04B35/638 , C04B35/64 , C04B38/00
CPC分类号： B01D39/2037 , C04B35/195 , C04B35/565 , C04B35/62655 , C04B35/63 , C04B35/634 , C04B35/63416 , C04B35/6365 , C04B35/638 , C04B38/00 , C04B38/0006 , C04B2235/3826 , C04B2235/428 , C04B2235/6021 , C04B2235/668 , C04B2235/728 , C04B2235/80 , C04B38/0645 , C04B38/067 , C04B38/0655 , C04B35/64
摘要： PROBLEM TO BE SOLVED: To provide a method of producing a porous ceramic body, by which not only a porous ceramic having a low porosity but also a ceramic having a high porosity can be produced without causing cracks at the time of firing. SOLUTION: In the method of producing the porous ceramic body, comprising preparing a formed body by using a ceramic raw material including a pore forming agent and a binder, then drying the formed body and firing the dried formed body, the firing atmosphere temperature is kept in the temperature range of -50 to +10°C with respect to the burning start temperature of the binder in a period from the time point when the temperature reaches the burning start temperature of the binder contained in the porous ceramic body to be fired to the time point when the binder is completely burned down. COPYRIGHT: (C)2004,JPO

5. 发明专利

JP2001199777A HONEYCOMB STRUCTURE AND METHOD FOR PRODUCING THE SAME 失效
公开(公告)号：JP2001199777A
公开(公告)日：2001-07-24
申请号：JP2000008288
申请日：2000-01-17
申请人： NGK INSULATORS LTD
发明人： YAMAMOTO YOSHINORI , NODA NAOMI , HARADA SETSU
IPC分类号： B01D39/20 , B01D46/24 , B01D53/94 , B01J35/04 , C04B35/00 , C04B38/00 , F01N3/02 , F01N3/022 , F01N3/28
摘要： PROBLEM TO BE SOLVED: To provide a honeycomb structure which contains refractory particles such as silicon carbide particles, can be produced at a relatively low sintering temperature at a low cost, is sufficiently porous, has a high specific surface area, and can suitably be used as a filter or a catalyst carrier for cleaning automotive exhaust gases under a high SV condition. SOLUTION: This honeycomb structure divided with bulkheads to form many flow holes penetrated in the axial direction, characterized by containing refractory particles and a glassy component and being porous.

6. 发明专利

JPH06283247A SEMICONDUCTOR TYPE LIGHTNING ARRESTER 失效
公开(公告)号：JPH06283247A
公开(公告)日：1994-10-07
申请号：JP6837093
申请日：1993-03-26
申请人： NGK INSULATORS LTD
发明人： ICHIOKA TATSUMI , YAMAMOTO YOSHINORI , TANGE MASAJI
IPC分类号： H01T4/10 , H02H9/04
摘要： PURPOSE:To cur off current following the lightning surge within one cycle and greatly lower the cost by connecting elements having a current rectifying function in reversely parallel to thyrister elements and forming gaps in series to these elements. CONSTITUTION:Diodes, which are elements 5 having a current rectifying function, and thyrister elements 1 having gate circuits 4 are connected in reversely parallel to each other and gasp 6 are formed in series to them. To provide high withstand voltage, the thyrister elements and elements 5 having a current rectifying function are installed in multistages. Consequently, electric power source system 2 is insulated by the gaps 6 at normal time, and when lightning surge current is generated, the gaps 6 carry out electric discharge and at the same time the thyrister elements are turned on at thigh speed by gate signals from the gate circuits 4. As a result, the current run from the power source system 2 to the ground 3 through the thyrister elements 1 and the current from the ground 3 to the power source system 2 runs through diodes, which are the elements 5 having a current rectifying function and thus the power source 2 is protected from the lightning surge current.

7. 发明专利

JPH0670458A SEMICONDUCTOR ARRESTER 失效
公开(公告)号：JPH0670458A
公开(公告)日：1994-03-11
申请号：JP22151092
申请日：1992-08-20
申请人： NGK INSULATORS LTD
发明人： ISHIBASHI CHIHIRO , ICHIOKA TATSUMI , YAMAMOTO YOSHINORI , TANGE MASAJI
IPC分类号： H02H9/04 , H02H9/06
摘要： PURPOSE:To provide a semiconductor arrester in which, even if a general purpose thyristor device is employed, the thyristor device is protected from breakdown. CONSTITUTION:A thyristor 2 which is self-ignited by a gap discharge is connected in series to a gap 1 between which a discharge is induced by an overvoltage generated in a power system by a thunderbolt, etc. An ignition element 10 which supplies an ignition signal to the thyristor 2 only when the discharge is induced between the gap 1 to promote the extention of the continuity region of the device is connected to the gate G of the thyristor 2 and the thyristor 2 is ignited by the ignition signal supplied through the gate G at the time of the gap discharge. With this constitution, the continuity pegion of the tyyristor is rapidly extended, so that the beakdown of the device caused by current concentration can be avoided.

8. 发明专利

JP2003247412A HONEYCOMB STRUCTURE BODY CONTAINING Si AND METHOD FOR PRODUCING THE SAME 审中-公开
公开(公告)号：JP2003247412A
公开(公告)日：2003-09-05
申请号：JP2002017366
申请日：2002-01-25
申请人： NGK INSULATORS LTD
发明人： MORIMOTO KENJI , KAWASAKI SHINJI , SAKAI HIROAKI , ICHIKAWA SHUICHI , HARADA SETSU , OTSUKA AIKO , WADA YUKIHISA , YAMAMOTO YOSHINORI
IPC分类号： F01N3/02 , B01D39/20 , B01D46/24 , B01J21/08 , B01J27/224 , B01J35/04 , B01J37/08 , B01J37/34 , B28B3/26 , C04B35/117 , C04B35/185 , C04B35/488 , C04B35/505 , C04B38/00 , F01N3/022 , F01N3/28
摘要： PROBLEM TO BE SOLVED: To provide a honeycomb structure body excellent in thermal shock resistance by improving thermal conductivity of the honeycomb structure body. SOLUTION: The honeycomb structure body 1 includes a large number of through holes 3 which extend through the structure body in the direction of X-axis, the through holes being divided from one another by means of partition walls 2. The honeycomb structure body is characterized by containing Si phase of which lattice constant at a room temperature is controlled to be 0.54302-0.54311 nm. A method for producing the honeycomb structure body 1 includes a burning process of burning a honeycomb structure precursory body. In the producing method, the precursory body contains Si phase and the burning process is carried out using a ceramic material which does not contain a boron containing compound. In the producing method, a rate of decrease of Si content in the Si phase after the burning process to Si content in the Si phase before the burning process is suppressed to 10 mass % or less. COPYRIGHT: (C)2003,JPO

9. 发明专利

JPH086651A VOLTAGE STABILIZING DEVICE 失效
公开(公告)号：JPH086651A
公开(公告)日：1996-01-12
申请号：JP13606894
申请日：1994-06-17
申请人： NGK INSULATORS LTD
发明人： ISHIBASHI CHIHIRO , ICHIOKA TATSUMI , YAMAMOTO YOSHINORI , SAKURAI TAKAYUKI
IPC分类号： H02J3/12 , G05F1/24
摘要： PURPOSE:To compensate voltage variation instantaneously and continuously by connecting a voltage detecting circuit which detects the load-side voltage of a line to a voltage adjusting circuit and stabilizing the load-side voltage of the line on the basis of the detected voltage from the voltage detector. CONSTITUTION:A transformer 30 for adjustment 30 boosts a voltage in expectation of a voltage drop due to a load current and the voltage adjusting circuit 50 places in a series transformer 40 in operation according to the load-side detected voltage of the line obtained by the voltage detector 70. The capacity of the voltage adjusting circuit 50 is reduced through the voltage boosting operation of the transformer 30 for adjustment, and consequently heat loss due to the heat generation of a thyristor constituting the main circuit part of the voltage adjusting circuit 50 is reducible, thereby reducing electric power loss. Even if abrupt voltage variation is caused on the line, the series transformer 40 can raise or lower the load-side voltage of the line instantaneously and continuously through the operation of the voltage adjusting circuit 50. Consequently, the voltage variation can be compensated instantaneously and continuously.

10. 发明专利

JPH06245374A SEMICONDUCTOR ARRESTER 失效
公开(公告)号：JPH06245374A
公开(公告)日：1994-09-02
申请号：JP3196793
申请日：1993-02-22
申请人： NGK INSULATORS LTD
发明人： ICHIOKA TATSUMI , TANGE MASAJI , YAMAMOTO YOSHINORI
IPC分类号： H01T2/00 , H01T15/00 , H02H9/04 , H02H9/06
摘要： PURPOSE:To provide a semiconductor arrester which has no fear of damage of a thyristor element due to a current concentration, an overvoltage without delay of an operation. CONSTITUTION:A thyristor element 1 and a zinc oxide element 2 are connected in parallel between a power system 6 and a ground. A constant-voltage diode 3 as means for extracting a discharge current is provided in series with the element 2, and part of the discharge current flowing through the element 2 is input to a gate of the element 1 through a resistor 5 to be ignited.

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