公开(公告)号：US4479867A

公开(公告)日：1984-10-30

申请号：US518919

申请日：1983-08-01

申请人： Elisabeth Siebert ,  Jacques Fouletier ,  Serge Vilminot

发明人： Elisabeth Siebert ,  Jacques Fouletier ,  Serge Vilminot

IPC分类号： G01N27/416 ,  G01L11/00 ,  G01N20060101 ,  G01N7/00 ,  G01N27/407 ,  G01N27/58

CPC分类号： G01N27/4073

摘要： Electrochemical system for measuring the partial pressure of oxygen in a gaseous or liquid atmosphere, in which the electrolyte is a halogenide mixture doped with peroxide ions. This system constitutes an oxygen gauge permitting measurements at temperatures below 200.degree. C.

摘要翻译： 用于测量气态或液态气氛中氧分压的电化学系统，其中电解质是掺有过氧化物离子的卤化物混合物。 该系统构成氧气表，允许在低于200℃的温度下测量。

公开(公告)号：US4910079A

公开(公告)日：1990-03-20

申请号：US287328

申请日：1988-12-21

申请人： Arvind Shroff ,  Serge Vilminot ,  Dominique Brion ,  Bernard Carriere ,  Veronique Hebert

发明人： Arvind Shroff ,  Serge Vilminot ,  Dominique Brion ,  Bernard Carriere ,  Veronique Hebert

IPC分类号： B22F3/26 ,  H01J1/28 ,  H01J9/04

CPC分类号： B22F3/26 ,  H01J1/28 ,  H01J9/042 ,  Y10T428/249955 ,  Y10T428/249956 ,  Y10T428/249957

摘要： Disclosed are a method for the fabrication of an impregnated cathode and a cathode obtained thereby. The impregnation is obtained by applying a sol-gel method. The emissive material which impregnates the body of the cathode only partially fills the pores. This facilitates the migration of the material towards the surface and increases the lifetime of the cathode.

摘要翻译： 公开了一种用于制造由此获得的浸渍阴极和阴极的方法。 通过施加溶胶 - 凝胶法获得浸渍。 浸渍阴极体的发射材料仅部分填充孔。 这有助于材料向表面的迁移并且增加阴极的寿命。

公开(公告)号：US4888314A

公开(公告)日：1989-12-19

申请号：US884538

申请日：1986-07-11

申请人： Jean-Claude Bernier ,  Paul J. L. Poix ,  Jean-Luc Rehspringer ,  Gabriel G. J. Vilmin ,  Serge Vilminot

发明人： Jean-Claude Bernier ,  Paul J. L. Poix ,  Jean-Luc Rehspringer ,  Gabriel G. J. Vilmin ,  Serge Vilminot

IPC分类号： C01B33/26 ,  C04B35/195 ,  H01G4/12 ,  H01L21/48 ,  H01L23/15

CPC分类号： H01L21/4807 ,  C01B33/26 ,  C04B35/195 ,  H01G4/1209 ,  H01L23/15 ,  H01L2924/0002 ,  H01L2924/09701

摘要： The present invention relates to a cordierite (2MgO.2Al.sub.2 O.sub.3.5SiO.sub.2) type ceramic powder sintering at low-temperature defined in that its composition is: 60 to 50% SiO.sub.2, 5 to 20% MgO and 20 to 40% Al.sub.2 O.sub.3, and in that its specific surface area is not less than 50 m.sup.2 /g, this powder having a fritting temperature of less than 1,100.degree. C.The invention also relates to a process for the preparation of this powder, which consists in preparing a mixed alcoholic solution of an aluminum and silicon salt, in preparing a solution of an alcohol-soluble magnesium salt, in mixing the two solutions, in padding a hydrolyzing agent in the form of a totally volatile weak base to the solution, which leads to the formation of a gel, in subjecting the said gel to a first thermal treatment at a temperature not exceeding 450.degree. C., and in subjecting the said powder to a second thermal treatment at a temperature of between 450.degree. C. and 900.degree. C.By a sintering which may be carried out at a temperature lower than 950.degree. C., the powder obtained leads to dielectric ceramics which have a coefficient of expansion less than 1.10.sup.-6 C.sup.-1, and a dielectric constant less than 5.

摘要翻译： 本发明涉及在低温下烧结的堇青石（2MgO.2Al2O3.5SiO2）型陶瓷粉末，其特征在于其组成为：60至50％的SiO 2，5至20％的MgO和20至40％的Al 2 O 3，其中 其比表面积不小于50m 2 / g，该粉末的烧结温度低于1100℃。本发明还涉及一种制备该粉末的方法，该方法包括制备混合的醇溶液 铝和硅盐，在制备醇可溶性镁盐溶液时，将两种溶液混合，将完全挥发性弱碱形式的水解剂填充到溶液中，导致形成凝胶， 在不超过450℃的温度下对所述凝胶进行第一次热处理，并在450℃至900℃的温度下对所述粉末进行第二次热处理。通过烧结可以 在较低的温度下进行 在950℃下，得到的粉末导致膨胀系数小于1.10-6C-1，介电常数小于5的介电陶瓷。