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公开(公告)号：US08390183B2
公开(公告)日：2013-03-05
申请号：US12598482
申请日：2009-03-26
申请人： Hirokazu Kurono , Toshitaka Honda , Hiroki Takeuchi , Takeshi Mitsuoka , Kuniharu Tanaka , Kazunari Miyata , Katsuya Takaoka
发明人： Hirokazu Kurono , Toshitaka Honda , Hiroki Takeuchi , Takeshi Mitsuoka , Kuniharu Tanaka , Kazunari Miyata , Katsuya Takaoka
IPC分类号： H01T21/02
CPC分类号： H01T13/38 , C04B35/111 , C04B35/6261 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3222 , C04B2235/3224 , C04B2235/3227 , C04B2235/3229 , C04B2235/3418 , C04B2235/5436 , C04B2235/656 , C04B2235/6567 , C04B2235/77 , C04B2235/786 , C04B2235/80 , C04B2235/96 , H01T21/02
摘要： This invention has an object to provide a spark plug exhibiting high withstand voltage characteristics and high strength at high temperature, formed by an alumina-based sintered body prepared with excellent processability and high productivity, and a method for manufacturing the spark plug. This invention relates to a spark plug 1 including an insulator 3, wherein the insulator 3 includes a dense alumina-based sintered body having an average crystal particle diameter of 1.50 μm or more, and the alumina-based sintered body contains Si, a Group 2 element component containing Ba and a Group 2 element other than those, and a rare earth element component, such that a ratio of a content S of the Si component to a total content of the content S and a content A of the Group 2 element component is 0.60 or more, and a method for manufacturing the spark plug 1 prepared through a grinding-shaping process in which the insulator 3 is ground before burning to shape the same.
摘要翻译： 本发明的目的是提供一种具有高耐压特性和高温强度的火花塞，由具有优异的加工性和高生产率制备的氧化铝基烧结体形成，以及一种用于制造火花塞的方法。 本发明涉及一种包括绝缘体3的火花塞1，其中绝缘体3包括平均结晶粒径为1.50μm以上的致密的氧化铝基烧结体，氧化铝基烧结体包含Si，第2组 含有Ba的元素成分和除此以外的第2族元素的元素成分和稀土元素成分，使得Si成分的含量S与含量S的总含量的比率和第2族元素成分的含量A 为0.60以上，以及通过研磨成形工序制造火花塞1的方法，其中绝缘体3在燃烧之前被磨削成形。
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公开(公告)号：US20100136867A1
公开(公告)日：2010-06-03
申请号：US12598482
申请日：2009-03-26
申请人： Hirokazu Kurono , Toshitaka Honda , Hiroki Takeuchi , Takeshi Mitsuoka , Kuniharu Tanaka , Kazunari Miyata , Katsuya Takaoka
发明人： Hirokazu Kurono , Toshitaka Honda , Hiroki Takeuchi , Takeshi Mitsuoka , Kuniharu Tanaka , Kazunari Miyata , Katsuya Takaoka
CPC分类号： H01T13/38 , C04B35/111 , C04B35/6261 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3222 , C04B2235/3224 , C04B2235/3227 , C04B2235/3229 , C04B2235/3418 , C04B2235/5436 , C04B2235/656 , C04B2235/6567 , C04B2235/77 , C04B2235/786 , C04B2235/80 , C04B2235/96 , H01T21/02
摘要： This invention has an object to provide a spark plug exhibiting high withstand voltage characteristics and high strength at high temperature, formed by an alumina-based sintered body prepared with excellent processability and high productivity, and a method for manufacturing the spark plug. This invention relates to a spark plug 1 including an insulator 3, wherein the insulator 3 includes a dense alumina-based sintered body having an average crystal particle diameter of 1.50 μm or more, and the alumina-based sintered body contains Si, a Group 2 element component containing Ba and a Group 2 element other than those, and a rare earth element component, such that a ratio of a content S of the Si component to a total content of the content S and a content A of the Group 2 element component is 0.60 or more, and a method for manufacturing the spark plug 1 prepared through a grinding-shaping process in which the insulator 3 is ground before burning to shape the same.
摘要翻译： 本发明的目的是提供一种具有高耐压特性和高温强度的火花塞，由具有优异的加工性和高生产率制备的氧化铝基烧结体形成，以及一种用于制造火花塞的方法。 本发明涉及一种包括绝缘体3的火花塞1，其中绝缘体3包括平均结晶粒径为1.50μm以上的致密的氧化铝基烧结体，氧化铝基烧结体包含Si，第2组 含有Ba的元素成分和除此以外的第2族元素的元素成分和稀土元素成分，使得Si成分的含量S与含量S的总含量的比率和第2族元素成分的含量A 为0.60以上，以及通过研磨成形工序制造火花塞1的方法，其中绝缘体3在燃烧之前被磨削成形。
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公开(公告)号：US08564184B2
公开(公告)日：2013-10-22
申请号：US13497904
申请日：2010-06-23
申请人： Hirokazu Kurono , Toshitaka Honda , Katsuya Takaoka , Hiroki Takeuchi , Kuniharu Tanaka , Takeshi Mitsuoka
发明人： Hirokazu Kurono , Toshitaka Honda , Katsuya Takaoka , Hiroki Takeuchi , Kuniharu Tanaka , Takeshi Mitsuoka
CPC分类号： H01T13/36 , C04B35/117 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3222 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3418 , C04B2235/5436 , C04B2235/5445 , C04B2235/604 , C04B2235/77 , C04B2235/963 , H01T13/38 , H01T21/02
摘要： A spark plug that is equipped with an insulator that has a stem portion on a front end side, a center electrode, and a main metal member that retains the insulator at an engaging projection portion, wherein an inner diameter DIN of the engaging projection portion, the maximum outer diameter dOUT of the stem portion, which faces an inner circumferential surface of the engaging projection portion, its inner diameter dIN, and dielectric constant ∈ of the insulator satisfy the condition of “(DIN−dOUT)/2≦0.40 (mm)”, “(dOUT−dIN)/2≦1.65 (mm)”, and “∈≧9.4”.
摘要翻译： 一种火花塞，其配备有在前端侧具有杆部的绝缘体，中心电极和将绝缘体保持在接合突出部的主金属构件，其中，接合突起部的内径DIN， 杆部的面向接合突出部的内周面的最大外径dOUT，其内径dIN和绝缘体的介电常数E满足条件“（DIN- dOUT )/2@0.40（mm） ）“，”（dOUT-dIN)/2@1.65（mm）“，”E“= 9.4”。
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公开(公告)号：US20120262049A1
公开(公告)日：2012-10-18
申请号：US13497904
申请日：2010-06-23
申请人： Hirokazu Kurono , Toshitaka Honda , Katsuya Takaoka , Hiroki Takeuchi , Kuniharu Tanaka , Takeshi Mitsuoka
发明人： Hirokazu Kurono , Toshitaka Honda , Katsuya Takaoka , Hiroki Takeuchi , Kuniharu Tanaka , Takeshi Mitsuoka
CPC分类号： H01T13/36 , C04B35/117 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3222 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3229 , C04B2235/3418 , C04B2235/5436 , C04B2235/5445 , C04B2235/604 , C04B2235/77 , C04B2235/963 , H01T13/38 , H01T21/02
摘要： A spark plug that is equipped with an insulator that has a stem portion on a front end side, a center electrode, and a main metal member that retains the insulator at an engaging projection portion, wherein an inner diameter DIN of the engaging projection portion, the maximum outer diameter dOUT of the stem portion, which faces an inner circumferential surface of the engaging projection portion, its inner diameter dIN, and dielectric constant ∈ of the insulator satisfy the condition of “(DIN−dOUT)/2≦0.40 (mm)”, “(dOUT−dIN)/2≦1.65 (mm)”, and “∈≧9.4”.
摘要翻译： 一种火花塞，其配备有在前端侧具有杆部的绝缘体，中心电极和将绝缘体保持在接合突出部的主金属构件，其中，接合突起部的内径DIN， 面向接合突起部的内周面的杆部的最大外径dOUT，绝缘体的内径dIN和介电常数ε满足条件（DIN-dOUT）/2≦̸0.40（mm） ，（dOUT-dIN）/2≦̸1.65（mm），∈≥9.4。
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公开(公告)号：US08278809B2
公开(公告)日：2012-10-02
申请号：US13257709
申请日：2010-03-09
申请人： Hirokazu Kurono , Toshitaka Honda , Katsuya Takaoka , Hiroki Takeuchi , Kuniharu Tanaka , Takeshi Mitsuoka
发明人： Hirokazu Kurono , Toshitaka Honda , Katsuya Takaoka , Hiroki Takeuchi , Kuniharu Tanaka , Takeshi Mitsuoka
CPC分类号： C04B35/113 , C04B35/117 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3217 , C04B2235/3222 , C04B2235/3224 , C04B2235/3227 , C04B2235/3229 , C04B2235/3418 , C04B2235/5436 , C04B2235/80 , C04B2235/96 , H01T13/38
摘要： A spark plug exhibits a satisfactory withstand voltage characteristic and sufficient mechanical strength in a high temperature environment exceeding 700° C. The spark plug has a center electrode, an insulator, and a ground electrode, characterized in that the insulator is formed of an alumina-based sintered material containing an Si component, a Group 2 element (2A) component, and a rare earth element (RE) component; that the alumina-based sintered material has an RE-β-alumina crystal phase; and that the mean crystal grain size DA(RE) of the RE-β-alumina crystal phase and that of alumina DA(Al) satisfy the following relationship (1): 0.2≦DA(RE)/DA(Al)≦3.0.
摘要翻译： 火花塞在超过700℃的高温环境中表现出令人满意的耐电压特性和足够的机械强度。火花塞具有中心电极，绝缘体和接地电极，其特征在于绝缘体由氧化铝 - 含有Si成分，第2族元素（2A）成分和稀土元素（RE）成分的烧结体; 氧化铝基烧结材料具有RE-＆BGR--氧化铝结晶相; 并且氧化铝DA（Al）的平均晶粒尺寸DA（RE）满足以下关系式（1）：0.2＆nlE; DA（RE）/ DA（Al）＆nlE ; 3.0。
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公开(公告)号：US20120007489A1
公开(公告)日：2012-01-12
申请号：US13257709
申请日：2010-03-09
申请人： Hirokazu Kurono , Toshitaka Honda , Katsuya Takaoka , Hiroki Takeuchi , Kuniharu Tanaka , Takeshi Mitsuoka
发明人： Hirokazu Kurono , Toshitaka Honda , Katsuya Takaoka , Hiroki Takeuchi , Kuniharu Tanaka , Takeshi Mitsuoka
IPC分类号： H01T13/38
CPC分类号： C04B35/113 , C04B35/117 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3217 , C04B2235/3222 , C04B2235/3224 , C04B2235/3227 , C04B2235/3229 , C04B2235/3418 , C04B2235/5436 , C04B2235/80 , C04B2235/96 , H01T13/38
摘要： A spark plug exhibits a satisfactory withstand voltage characteristic and sufficient mechanical strength in a high temperature environment exceeding 700° C. The spark plug has a center electrode, an insulator, and a ground electrode, characterized in that the insulator is formed of an alumina-based sintered material containing an Si component, a Group 2 element (2A) component, and a rare earth element (RE) component; that the alumina-based sintered material has an RE-β-alumina crystal phase; and that the mean crystal grain size DA(RE) of the RE-β-alumina crystal phase and that of alumina DA(Al) satisfy the following relationship (1): 0.2≦DA(RE)/DA(Al)≦3.0.
摘要翻译： 火花塞在超过700℃的高温环境中表现出令人满意的耐电压特性和足够的机械强度。火花塞具有中心电极，绝缘体和接地电极，其特征在于绝缘体由氧化铝 - 含有Si成分，第2族元素（2A）成分和稀土元素（RE）成分的烧结体; 氧化铝基烧结材料具有RE-＆BGR--氧化铝结晶相; 并且氧化铝DA（Al）的平均晶粒尺寸DA（RE）满足以下关系式（1）：0.2＆nlE; DA（RE）/ DA（Al）＆nlE ; 3.0。
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公开(公告)号：US08093791B2
公开(公告)日：2012-01-10
申请号：US12598459
申请日：2009-03-26
申请人： Hirokazu Kurono , Toshitaka Honda , Hiroki Takeuchi , Takeshi Mitsuoka , Kuniharu Tanaka , Katsuya Takaoka
发明人： Hirokazu Kurono , Toshitaka Honda , Hiroki Takeuchi , Takeshi Mitsuoka , Kuniharu Tanaka , Katsuya Takaoka
IPC分类号： H01T13/20
CPC分类号： H01T13/38 , C04B35/111 , C04B2235/3206 , C04B2235/3208 , C04B2235/3215 , C04B2235/3222 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3418 , C04B2235/5436 , C04B2235/656 , C04B2235/6567 , C04B2235/77 , C04B2235/786 , C04B2235/80 , C04B2235/96 , H01B1/12
摘要： An object of the invention is to provide a spark plug including an insulator which is difficult to cause breakdown and exhibits higher withstand voltage characteristics. This invention relates to a spark plug 1 including a center electrode 2, an insulator 3 and a grounding electrode 6, wherein the insulator is formed by an alumina-based sintered body which has a theoretical density ratio of 95.0% or more, which contains a rare earth element component, Si component, and at least two kinds of Group 2 element (2A) components, and in which the rare earth element being dispersed so as to satisfy the following condition: when 7 places of measurement line (measurement length: 180 μm) are selected in the alumina-based sintered body and the rare earth element (RE) present in each of selected measurement lines is analyzed with an energy dispersion method, a total number of measurement lines in which 8 or more peaks derived from the rare earth element (RE) are observed is 4 places or more of the 7 places.
摘要翻译： 本发明的目的是提供一种火花塞，其包括难以引起击穿并且具有更高的耐受电压特性的绝缘体。 本发明涉及一种火花塞1，其包括中心电极2，绝缘体3和接地电极6，其中绝缘体由理论密度比为95.0％以上的氧化铝基烧结体形成，该氧化铝基烧结体含有 稀土元素成分，Si成分，以及至少2种2族元素（2A）成分，稀土类元素分散以满足以下条件：条件>当测量线7（测量值） 长度：180μm），并且使用能量分散法分析存在于所选择的测量线中的稀土元素（RE），其中8个或更多个峰衍生的测量线的总数 从稀土元素（RE）观察到的是7个地方的4个或更多个。
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公开(公告)号：US20100084960A1
公开(公告)日：2010-04-08
申请号：US12598459
申请日：2009-03-26
申请人： Hirokazu Kurono , Toshitaka Honda , Hiroki Takeuchi , Takeshi Mitsuoka , Kuniharu Tanaka , Katsuya Takaoka
发明人： Hirokazu Kurono , Toshitaka Honda , Hiroki Takeuchi , Takeshi Mitsuoka , Kuniharu Tanaka , Katsuya Takaoka
IPC分类号： H01T13/20
CPC分类号： H01T13/38 , C04B35/111 , C04B2235/3206 , C04B2235/3208 , C04B2235/3215 , C04B2235/3222 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3418 , C04B2235/5436 , C04B2235/656 , C04B2235/6567 , C04B2235/77 , C04B2235/786 , C04B2235/80 , C04B2235/96 , H01B1/12
摘要： An object of the invention is to provide a spark plug including an insulator which is difficult to cause breakdown and exhibits higher withstand voltage characteristics. This invention relates to a spark plug 1 including a center electrode 2, an insulator 3 and a grounding electrode 6, wherein the insulator is formed by an alumina-based sintered body which has a theoretical density ratio of 95.0% or more, which contains a rare earth element component, Si component, and at least two kinds of Group 2 element (2A) components, and in which the rare earth element being dispersed so as to satisfy the following condition: when 7 places of measurement line (measurement length: 180 μm) are selected in the alumina-based sintered body and the rare earth element (RE) present in each of selected measurement lines is analyzed with an energy dispersion method, a total number of measurement lines in which 8 or more peaks derived from the rare earth element (RE) are observed is 4 places or more of the 7 places.
摘要翻译： 本发明的目的是提供一种火花塞，其包括难以引起击穿并且具有更高的耐受电压特性的绝缘体。 本发明涉及一种火花塞1，其包括中心电极2，绝缘体3和接地电极6，其中绝缘体由理论密度比为95.0％以上的氧化铝基烧结体形成，该氧化铝基烧结体含有 稀土元素成分，Si成分，以及至少2种2族元素（2A）成分，稀土类元素分散以满足以下条件：条件>当测量线7（测量值） 长度：180μm），并且使用能量分散法分析存在于所选择的测量线中的稀土元素（RE），其中8个或更多个峰衍生的测量线的总数 从稀土元素（RE）观察到的是7个地方的4个或更多个。
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公开(公告)号：US08482187B2
公开(公告)日：2013-07-09
申请号：US13382116
申请日：2010-06-28
IPC分类号： F02M57/06
CPC分类号： H01T13/38 , C04B35/117 , C04B35/62695 , C04B2235/3201 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3418 , C04B2235/442 , C04B2235/528 , C04B2235/5427 , C04B2235/5436 , C04B2235/656 , C04B2235/6562 , C04B2235/6567 , C04B2235/77 , C04B2235/786 , C04B2235/85 , C04B2235/96
摘要： A spark plug which exhibits high dielectric strength at high temperature and which is unlikely to be deteriorated in dielectric strength is provided. The spark plug includes a center electrode, an insulator, and a metallic shell. The insulator includes an alumina-based sintered body which contains a silicon component, a Group II element component, and a rare earth element component. The alumina-based sintered body is composed of a glass phase and an alumina crystal phase as observed through X-ray diffraction analysis. When the grain boundary phase of the alumina-based sintered body is observed under a transmission electron microscope, and the weight ratio between an alkali metal component and the rare earth element component as reduced to oxides thereof [alkali metal/rare earth element] is calculated at 30 circular spots, each having a diameter of 0.3 nm, selected arbitrarily in a field of observation, the average of the weight ratios of the 30 spots falls within a range of 0.01 to 1.0.
摘要翻译： 提供一种在高温下表现出高介电强度并且不太可能劣化介电强度的火花塞。 火花塞包括中心电极，绝缘体和金属壳。 绝缘体包括含有硅成分，II族元素成分和稀土元素成分的氧化铝系烧结体。 氧化铝基烧结体通过X射线衍射分析观察，由玻璃相和氧化铝结晶相组成。 当在透射电子显微镜下观察氧化铝基烧结体的晶界相时，计算碱金属成分和稀土元素成分还原为氧化物[碱金属/稀土元素]的重量比 在30个圆点处，每个具有0.3nm的直径，在观察领域任意选择，30个点的重量比的平均值在0.01至1.0的范围内。
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公开(公告)号：US08749125B2
公开(公告)日：2014-06-10
申请号：US13377934
申请日：2010-07-02
CPC分类号： H01T13/38 , C04B35/111 , C04B35/62655 , C04B35/62695 , C04B2235/3201 , C04B2235/3206 , C04B2235/3208 , C04B2235/3213 , C04B2235/3215 , C04B2235/3222 , C04B2235/3224 , C04B2235/3225 , C04B2235/3227 , C04B2235/3418 , C04B2235/5436 , C04B2235/5445 , C04B2235/5463 , C04B2235/604 , C04B2235/612 , C04B2235/656 , C04B2235/72 , C04B2235/77 , C04B2235/786 , C04B2235/85 , C04B2235/96 , C04B2235/9615 , H01T13/60
摘要： A task of this invention is to provide a spark plug that is superior in withstand voltage characteristics at high temperatures. A spark plug of this invention is equipped with a center electrode, an insulator, and a metal shell, and is characterized by that the insulator is equipped with an alumina-based sintered body containing silicon component (Si component), magnesium component (Mg component), at least one component of calcium component, strontium component, and barium component, and a rare earth element component (RE component), that a grain boundary phase of the alumina-based sintered body has a hexaaluminate crystal containing the RE component, that, in the alumina-based sintered body, the weight ratio of the RE component to the Mg component is 5.4≦RE oxide/MgO≦17.5, and that the content of an alkali metal component in terms of oxide in a spot having a diameter of 0.3 nm, where the hexaaluminate crystal or the hexaaluminate crystal and Si component in the grain boundary phase is present by TEM, ranges from 0.01 weight % to 20 weight %.
摘要翻译： 本发明的任务是提供一种在高温下耐受电压特性优越的火花塞。 本发明的火花塞配备有中心电极，绝缘体和金属壳，其特征在于，绝缘体配备有含有硅成分（Si成分），镁成分（Mg成分）的氧化铝系烧结体 ），钙组分，锶组分和钡组分的至少一种组分和稀土元素组分（RE组分），所述氧化铝基烧结体的晶界相具有含有RE组分的六铝酸盐晶体，所述 在氧化铝系烧结体中，RE成分与Mg成分的重量比为5.4＆lt; lEE; RE氧化物/ MgO＆lt; NlE; 17.5，碱金属成分的含量以氧化物的直径 为0.3nm，其中六铝酸盐晶体或六铝酸盐晶体和晶界相中的Si组分通过TEM存在，为0.01重量％至20重量％。
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