公开(公告)号：US5304778A

公开(公告)日：1994-04-19

申请号：US979911

申请日：1992-11-23

Applicant: Sankar Dasgupta ,  James K. Jacobs ,  Stephen Radmacher ,  Marek Sobczyk

Inventor： Sankar Dasgupta ,  James K. Jacobs ,  Stephen Radmacher ,  Marek Sobczyk

IPC: F23Q7/00 ,  H05B3/14 ,  H05B3/00 ,  F02P19/02

CPC classification number: H05B3/141 ,  B32B18/00 ,  C04B35/58014 ,  C04B35/58021 ,  C04B35/58092 ,  C04B35/584 ,  C04B37/001 ,  F23Q7/001 ,  C04B2235/3217 ,  C04B2235/3225 ,  C04B2235/3873 ,  C04B2235/3891 ,  C04B2235/94 ,  C04B2237/36 ,  C04B2237/368 ,  C04B2237/58 ,  C04B2237/704 ,  C04B2237/765

Abstract: An improved ceramic heater to be incorporated in a glow plug is described. The heater is made up of a ceramic core enclosed by two layers sintered together to form a unitary ceramic heater. All three component elements of the heater are composed of silicon nitride containing different concentrations of an electrically conductive ceramic substance, such as titanium nitride, titanium carbonitride or molybdenum disilicide. Each component additionally contains low amounts of sintering additives. The core of the heater has the highest concentration (46-75 vol. %) of the electrically conductive substance. The core enclosed in a ceramic layer which is an electrical insulator and is composed of silicon nitride, less than 28 vol. % of the electrically conductive ceramic substance and sintering additives. An outer layer over the core contains the electrically conductive ceramic substance in a concentration (33-50 vol. %) which is in between that in the core and that in the insulator layer. One end of the core is integrally connected to the outer layer over it. The ceramic heater is fitted into a glow plug housing. The core and the outer layer properly joined to appropriate connectors in the glow plug housing form an electrical circuit when connected to an electrical power source.

Abstract translation: 描述了一种加入到电热塞中的改进的陶瓷加热器。 加热器由陶瓷芯组成，由两层烧结在一起形成一体的陶瓷加热器。 加热器的所有三个组分元件由含有不同浓度的导​​电陶瓷物质的氮化硅组成，例如氮化钛，碳氮化钛或二硅化钼。 每个组分另外含有少量的烧结添加剂。 加热器的核心具有最高的导电物质浓度（46-75体积％）。 封闭在陶瓷层中的芯体，该陶瓷层是电绝缘体，由氮化硅组成，小于28vol。 ％的导电陶瓷物质和烧结助剂。 芯上的外层包含浓度为（33-50体积％）的导电陶瓷物质，其浓度介于芯中和绝缘体层中。 芯的一端与外层整体连接。 陶瓷加热器安装在电热塞壳体中。 当连接到电源上时，正确地连接到电热塞壳体中的适当连接器的芯部和外层形成电路。

公开(公告)号：US4824625A

公开(公告)日：1989-04-25

申请号：US907927

申请日：1986-09-16

Applicant: T. Dennis Claar ,  Steven D. Poste ,  Adam J. Gesing ,  Marek Sobczyk ,  Narashima S. Raghavan ,  Dave K. Creber ,  Alan S. Nagelberg

Inventor： T. Dennis Claar ,  Steven D. Poste ,  Adam J. Gesing ,  Marek Sobczyk ,  Narashima S. Raghavan ,  Dave K. Creber ,  Alan S. Nagelberg

IPC: C04B35/622 ,  C04B35/10 ,  C04B35/65 ,  C04B35/80 ,  C04B41/50 ,  C04B41/87 ,  C22C1/10 ,  C22C29/02 ,  C22C29/12 ,  C22C29/16 ,  D04H1/54

CPC classification number: C04B41/009 ,  C04B35/652 ,  C04B35/80 ,  C04B41/5025 ,  C04B41/87 ,  C22C1/1036 ,  C22C2001/1063

Abstract: A method of producing a composite comprising a self-supporting polycrystalline material obtained by oxidation reaction of a molten parent metal with a vapor-phase oxidant comprising infiltrating a filler exhibiting inter-particle pore volume with a parent metal under conditions which control the respective rates of said metal infiltration and said oxidation reaction.

Abstract translation: 一种制备复合材料的方法，该方法包括通过熔融母体金属与气相氧化剂的氧化反应获得的自支撑多晶材料，该气相氧化剂包括在控制各自的速率的条件下将母体金属渗透到表现出颗粒间孔隙体积的填料 所述金属渗透和所述氧化反应。