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    • 3. 发明授权
    • Unit sheath
    • 单位护套
    • US6040519A
    • 2000-03-21
    • US166564
    • 1998-10-06
    • Hideki KitaHideo Kawamura
    • Hideki KitaHideo Kawamura
    • G01K1/08F23Q7/00G01K7/02H01L35/02
    • F23Q7/001
    • The present invention provides a unit sheath adaptable to a glow plug or a thermocouple, which is improved in durability by the protection from burn-out of the conductive filament. The unit sheath is preferably adapted to a glow plug 10. A protective envelope 1 of ceramics high in density includes a metallic filament 4 of any one of pure tungsten, molybdenum or alloy thereof. A high-density sealant 3 hermetically closes the envelope 1 at its opened end 5. Filler 2 of non-conductive, unburned material is packed in the space around the metallic filament 4 in the envelope 1. The filler contains therein an additive 7 that may be subjected to the oxidation at the temperature lower than that of the metallic filament 4. The additive 7 is composed of at least any one of a free oxygen absorber selected from the group of carbon, titanium, boron, aluminum and nitride thereof, or the mixture thereof.
    • 本发明提供了一种适用于电热塞或热电偶的单元护套,其通过防止导电丝的烧坏而提高耐久性。 单元护套优选地适合于电热塞10.密度高的陶瓷保护壳1包括纯钨,钼或其合金中的任何一种的金属丝4。 高密度密封剂3在其开口端5处气密地封闭外壳1.非导电未燃材料的填料2被包装在外壳1中的金属丝4周围的空间中。填料中含有添加剂7, 在比金属丝4低的温度下进行氧化。添加剂7由选自碳,钛,硼,铝及其氮化物的游离氧吸收剂中的至少任一种,或 的混合物。
    • 5. 发明授权
    • Thermocouple structure
    • 热电偶结构
    • US5696348A
    • 1997-12-09
    • US710416
    • 1996-09-17
    • Hideo KawamuraHideki Kita
    • Hideo KawamuraHideki Kita
    • G01K1/12G01K7/04H01L35/04H01L35/20
    • G01K7/04G01K1/125
    • A thermocouple structure capable of measurement of a high temperature with a high accuracy is constituted of a protective pipe made of a heat-resistant ceramic; a pair of wires differing in kind and extending in the protective pipe from one end thereof to the other end thereof in the longitudinal direction thereof in a state of being spaced away from each other; a thin film constituting a temperature-sensing portion, made of a tungsten alloy, disposed on one end portion of said protective pipe, and connected to the wires; and a covering layer made of a heat-resistant ceramic and covering the thin film in such a way as to disallow exterior exposure of the thin film. The protective pipe is made of Si.sub.3 N.sub.4, and a filling member made of a powder mixture of Si.sub.3 N.sub.4 and TiN is filled in the protective pipe. Alternatively, a pair of printed strips differing in kind may be formed as wires in a protective pipe to provide such a thermocouple structure.
    • 能够以高精度测量高温的热电偶结构由耐热陶瓷制成的保护管构成; 在保护管中从保护管的一端沿长边方向延伸到另一端的一对线彼此间隔开的状态; 构成由钨合金制成的温度感测部分的薄膜,设置在所述保护管的一个端部并连接到所述导线上; 以及由耐热陶瓷制成的覆盖层,并且以不允许薄膜的外部曝光的方式覆盖薄膜。 保护管由Si 3 N 4制成,并且由保护管中填充由Si 3 N 4和TiN的粉末混合物制成的填充构件。 或者,可以将不同种类的一对印刷条形成为保护管中的导线,以提供这种热电偶结构。
    • 6. 发明授权
    • Ceramic sheath type thermocouple
    • 陶瓷护套型热电偶
    • US6102565A
    • 2000-08-15
    • US890427
    • 1997-07-09
    • Hideki KitaHideo KawamuraKazuo Miyajima
    • Hideki KitaHideo KawamuraKazuo Miyajima
    • G01K1/12G01K7/02G01K1/08G01K7/04H01L35/02
    • G01K1/125G01K7/02
    • This ceramic sheath type thermocouple has a long service life, an improved temperature measuring responsibility and an improved temperature measuring precision, and enables repetitive use. The ceramic sheath type thermocouple has its protective tube 1 formed of a heat resisting ceramics selected from silicon nitride, sialon and silicon carbide. In the protective tube 1 are installed a pair of W--Re wires that are connected to form a joint portion constituting a temperature measuring point 5. A filler made of Si.sub.3 N.sub.4 reaction-sintered ceramics is loaded into the front end portion of the protective tube to enclose the W--Re wires. Another filler made of SiC whisker with a heat conductivity smaller than that of the filler of the front end portion is loaded into the rear portion of the protective tube. An inert gas is sealed in the protective tube. Alternatively, the temperature measuring portion may be formed by exposing from the front end portion of the protective tube the joint portion where the ends of the W--Re wires are connected. The temperature measuring portion is coated with a cover film that is made of silicon carbide, silicon nitride or a composite of these, all having excellent heat resisting and corrosion resisting properties.
    • 这种陶瓷护套型热电偶具有使用寿命长,温度测量的重要性和改进的温度测量精度,并能重复使用。 陶瓷护套型热电偶的保护管1由选自氮化硅,赛隆和碳化硅的耐热陶瓷形成。 在保护管1中安装有一对连接形成构成温度测量点5的接头部分的W-Re线。将由Si 3 N 4反应烧结陶瓷制成的填料装入保护管的前端部, 包围W-Re电线。 由导热性小于前端部填料的SiC晶须制成的另一种填料装入保护管的后部。 惰性气体密封在保护管中。 或者,温度测量部分可以通过从保护管的前端部分暴露W-Re线的端部连接的接合部分而形成。 温度测量部分涂覆有由碳化硅,氮化硅或它们的复合材料制成的覆盖膜,全部具有优异的耐热性和耐腐蚀性。
    • 10. 发明授权
    • Ceramics having a low heat conductivity
    • 具有低导热性的陶瓷
    • US6025290A
    • 2000-02-15
    • US877802
    • 1997-06-18
    • Hideki Kita
    • Hideki Kita
    • C04B35/584C04B35/591C04B41/87C04B35/596
    • C04B35/591
    • In the ceramics having a low heat conductivity, silicon nitride is contained as a main component, a composite oxide or a separate phase thereof and transition metal elements having 66 to 75 of atomic number are dispersed into a substrate, and a minute layer grown continuous to the substrate is formed on the surface of the substrate. The composite oxide is at least one of 3Al.sub.2 O.sub.3. 2SiO.sub.2, 2MgO.2Al.sub.2 O.sub.3.5SiO.sub.2, 2MgO.SiO.sub.2 and 4MgO.5Al.sub.2 O.sub.3.2SiO.sub.2. The adding quantity of the composite oxide and the separate phase thereof is 15 to 60 wt. % in terms of the composite oxide. The adding component of transition metal elements having 66 to 75 of atomic number is less 10 wt. % in terms of oxide of the transition metal elements.
    • 在具有低导热性的陶瓷中,含有氮化硅作为主要成分,复合氧化物或其分离相和原子序数为66〜75的过渡金属元素分散在基材中,并且连续生长的微细层 衬底形成在衬底的表面上。 复合氧化物是3Al2O3中的至少一种。 2SiO2,2MgO.2Al2O3.5SiO2,2MgO.SiO2和4Mg0.5Al2O3.2SiO2。 复合氧化物及其分离相的添加量为15〜60重量%。 以复合氧化物计。 具有原子序数为66〜75的过渡金属元素的添加成分为10重量%以下。 以过渡金属元素的氧化物换算。