公开(公告)号：EP1885662A1

公开(公告)日：2008-02-13

申请号：EP06764650.5

申请日：2006-05-19

申请人： Saint-Gobain Centre de Recherches et d'Etudes Européen

发明人： BERNARD-GRANGER, Guillaume ,  SINET, Christophe

IPC分类号： C04B35/115

CPC分类号： C04B35/115 ,  C04B35/6266 ,  C04B35/64 ,  C04B35/645 ,  C04B2235/5436 ,  C04B2235/602 ,  C04B2235/661 ,  C04B2235/77 ,  C04B2235/785 ,  C04B2235/786 ,  C04B2235/96 ,  Y10T428/2982

摘要： The invention relates to a sintered alumina product comprising, by weight percent, more than 99.95 % alumina (Al2O3), the alumina grain size being between 0.2 and 1.5 µm and having a density of greater than 99.95 % of the theoretical density of alumina.

公开(公告)号：EP1343195B1

公开(公告)日：2007-12-19

申请号：EP03251264.2

申请日：2003-03-03

申请人： NGK INSULATORS, LTD.

发明人： Asano, Osamu, c/o NGK Insulators, Ltd.

IPC分类号： H01J61/30 ,  C04B35/115

CPC分类号： H01J61/302 ,  C04B35/115 ,  H01J9/247

公开(公告)号：EP1727178A2

公开(公告)日：2006-11-29

申请号：EP06010261.3

申请日：2006-05-18

申请人： OSRAM-SYLVANIA INC.

发明人： Wei, George C.

IPC分类号： H01J9/24 ,  H01J61/30 ,  C04B35/115

CPC分类号： C04B35/6303 ,  B82Y30/00 ,  C04B35/115 ,  C04B2235/3206 ,  C04B2235/3217 ,  C04B2235/322 ,  C04B2235/3225 ,  C04B2235/3244 ,  C04B2235/3869 ,  C04B2235/5409 ,  C04B2235/5445 ,  C04B2235/5454 ,  C04B2235/549 ,  C04B2235/6021 ,  C04B2235/6022 ,  C04B2235/6023 ,  C04B2235/6027 ,  C04B2235/656 ,  C04B2235/6567 ,  C04B2235/658 ,  C04B2235/6587 ,  C04B2235/80 ,  C04B2235/85 ,  C04B2235/94 ,  H01J9/247 ,  H01J61/302

摘要： A translucent polycrystalline material suitable for use in ceramic discharge vessels for metal halide lamps is produced by sintering an alumina powder doped with a MgO sintering aid in a nitrogen atmosphere containing a partial pressure of a vapor phase carbon-containing species. The sintered polycrystalline alumina has a grain boundary phase containing aluminum, oxygen and nitrogen. The formation of the AI-O-N grain boundary phase is believed to facilitate the transport of nitrogen from entrapped pores during sintering. Preferably, the PCA is sintered in a carbon-element furnace under flowing ultra-high-purity nitrogen.

摘要翻译： 适用于陶瓷放电容器使用了金属卤化物灯的半透明多晶材料由掺杂有在氮气氛中含有气相含碳物种的分压的MgO烧结助剂的氧化铝粉末的烧结制造。 烧结的多晶氧化铝具有晶界相含有铝，氧和氮。 在Al-O-N的晶界相的形成被认为在烧结过程中促进氮的截留从孔中的运输。 优选地，该PCA是在流动的超高纯度下的碳 - 元件炉烧结氮。

公开(公告)号：EP1706365A1

公开(公告)日：2006-10-04

申请号：EP05701470.6

申请日：2005-01-10

申请人： Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.

发明人： KRELL, Andreas ,  BLANK, Paul ,  KLIMKE, Jens ,  HUTZLER, Thomas

IPC分类号： C04B35/115 ,  C04B35/10

CPC分类号： C04B35/6455 ,  C04B35/115 ,  C04B35/6261 ,  C04B35/62625 ,  C04B35/6263 ,  C04B35/63424 ,  C04B35/63444 ,  C04B35/64 ,  C04B2235/3208 ,  C04B2235/3217 ,  C04B2235/3222 ,  C04B2235/3232 ,  C04B2235/3239 ,  C04B2235/3241 ,  C04B2235/327 ,  C04B2235/3272 ,  C04B2235/3275 ,  C04B2235/3279 ,  C04B2235/5445 ,  C04B2235/6587 ,  C04B2235/661 ,  C04B2235/662 ,  C04B2235/665 ,  C04B2235/666 ,  C04B2235/667 ,  C04B2235/77 ,  C04B2235/785 ,  C04B2235/80 ,  C04B2235/94 ,  C04B2235/96 ,  C04B2235/9661

摘要： The invention relates to the field of ceramics, more specifically to a corundum material that is suitable for imitating colored corundum gems (rubies and sapphires) due to the optical properties thereof, and a method for producing molded objects from said material. The aim of the invention is to develop a corundum material that is provided with a corundum grain size which is as small as possible and a chromophoric dopant distribution which is as homogeneous as possible. Said aim is achieved by a colored transparent corundum material which is made of a polycrystalline sub-µm structure having an average particle size of

公开(公告)号：EP1146537A4

公开(公告)日：2006-09-13

申请号：EP00966444

申请日：2000-10-12

申请人： NGK INSULATORS LTD

发明人： MIYAZAWA SUGIO ,  ASAI MICHIO

IPC分类号： H01J61/30 ,  C04B35/111 ,  C04B35/115 ,  H01J9/24 ,  H01J9/26 ,  H01J61/36 ,  H01J61/82

CPC分类号： H01J61/361 ,  C04B2235/6582 ,  C04B2235/786 ,  C04B2235/94 ,  H01J9/266 ,  H01J61/302

摘要： To prevent occurrence of cracks without employing such a method as the precision control of sealing frit or the increase of capillary thickness. As a means for solution, about 20 times as much magnesium oxide as for a barrel portion (2) having an arcing space was added to form a capillary (3), followed by calcination at 1,200 DEG C. And after it had been connected to the separately formed barrel portion (2), the assembly was calcined again at 1,200 DEG C, and fired in a hydrogen atmosphere at 1,850 DEG C for 3 hours, with the result that whereas the mean alumina particle size for the barrel portion (2) was 32 mu m, the mean particle size for the capillary (3) was 19 mu m, giving an increase in strength.

摘要翻译： 本发明的目的是防止在玻璃料封口机上产生裂纹，而不需要确定玻璃料密封剂的精确量并增加每个毛细管的壁厚。 为了实现该目的，毛细管3由掺杂有一定数量的氧化镁的材料形成，该氧化镁比其中设置有发光空间的中心体2的材料大20倍，然后在1200℃预烘烤。 毛细管3连接到主体2，并且都在1200℃再次烘烤。最后，两者都在氢气气氛下在1850℃下烘烤3小时。 结果，毛细管3中的氧化铝颗粒的平均直径为19微米，小于中心体2的32微米，因此增加毛细管3的体力。

公开(公告)号：EP1532082A1

公开(公告)日：2005-05-25

申请号：EP03738415.3

申请日：2003-06-25

申请人： Koninklijke Philips Electronics N.V. ,  Fraunhofer-Gesellschaft zurFörderung der angewandten Forschung e.V.

发明人： VAN BRUGGEN, Michel, P., B. ,  KOP, Theo, A. ,  KEURSTEN, Theodora, A., P., M. ,  KRELL, Andreas ,  HUTZLER, Thomas

IPC分类号： C04B35/115 ,  H01J61/30 ,  H01J5/04

CPC分类号： H01J61/302 ,  C04B35/115 ,  C04B35/6263 ,  C04B35/6268 ,  C04B35/64 ,  C04B35/6455 ,  C04B2235/3206 ,  C04B2235/3217 ,  C04B2235/3224 ,  C04B2235/3225 ,  C04B2235/3227 ,  C04B2235/5445 ,  C04B2235/6581 ,  C04B2235/6582 ,  C04B2235/6585 ,  C04B2235/661 ,  C04B2235/72 ,  C04B2235/77 ,  C04B2235/785 ,  C04B2235/786 ,  C04B2235/94

摘要： The invention relates to highly dense transparent aluminum oxide (alumina) and structures thereof for applications where, e.g. in the lighting industry, a fine crystal size has to be obtained and stabilized for use at temperatures of 800°C or more. The invention also relates to an electric lamp having a discharge tube with a wall of such a ceramic. The alumina according to the invention is provided with an additive and has an average crystal size = 2µm, and a relative density higher than 99.95% with a real in-line transmission RIT = 30%, preferably > 40% and more preferably > 50%, measured over an angular aperture of at most 0.50 at a sample thickness of 0.8 mm and with a single wave-length of light λ of preferably 645nm, and the additive comprises at least one of the substances from the group consisting of oxides of Mg, Y, Er and La.

公开(公告)号：EP1458304A1

公开(公告)日：2004-09-22

申请号：EP02794199.6

申请日：2002-12-06

申请人： 3M Innovative Properties Company

发明人： CASTRO, Darren, T. ,  RUSIN, Richard, P.

IPC分类号： A61C7/12 ,  A61K6/06 ,  C04B35/115

CPC分类号： C04B35/6263 ,  A61C7/12 ,  A61C13/0022 ,  A61K6/0005 ,  A61K6/0008 ,  A61K6/0017 ,  A61K6/0215 ,  A61K6/0235 ,  A61K6/024 ,  A61K6/0245 ,  A61K6/0255 ,  B33Y70/00 ,  B33Y80/00 ,  C04B33/14 ,  C04B33/20 ,  C04B33/30 ,  C04B33/32 ,  C04B35/115 ,  C04B35/62655 ,  C04B35/63 ,  C04B35/6303 ,  C04B35/632 ,  C04B35/634 ,  C04B35/63424 ,  C04B35/638 ,  C04B35/6455 ,  C04B2235/3206 ,  C04B2235/3217 ,  C04B2235/3225 ,  C04B2235/3244 ,  C04B2235/449 ,  C04B2235/5409 ,  C04B2235/5445 ,  C04B2235/6022 ,  C04B2235/604 ,  C04B2235/608 ,  C04B2235/72 ,  C04B2235/77 ,  C04B2235/785 ,  C04B2235/96 ,  A61K6/083 ,  C08L33/02 ,  A61K6/087 ,  C08L71/02

摘要： A polycrystalline translucent aluminum oxide ceramic material having an average grain size of no greater than 1.0 micron and a Contrast Ratio value of less than about 0.7. The material can be in the form of a dental mill blank, dental prosthesis or other dental article or non-dental article.

摘要翻译： 平均粒径不大于1.0微米，对比度值小于约0.7的多晶半透明氧化铝陶瓷材料。 该材料可以是牙科磨料坯，牙科假体或其它牙齿制品或非牙科制品的形式。

公开(公告)号：EP1202323A3

公开(公告)日：2002-08-07

申请号：EP01309217.6

申请日：2001-10-31

申请人： NGK INSULATORS, LTD.

发明人： Miyazawa, Sugio, c/o NGK Insulators Ltd

IPC分类号： H01J61/30 ,  H01J61/36 ,  C04B35/115

CPC分类号： C04B35/115 ,  H01J61/30

摘要： A ceramic envelope for high intensity discharge lamp comprises: a cylindrical barrel section 1 that forms an electric discharge light emitting space; annular closing sections, that close both ends of the barrel section 1, respectively; and capillary sections 3 for receiving an electric discharge electrode to be protruded so as to be opposed to each other from the substantial center of both of the closing sections. The envelope essentially consists of alumina, and is formed to have light transmission properties by adding MgO. The thickness of the barrel section at the boundary between the barrel section 1 and the closing section 2 is formed to be increased in thickness relative to the thickness in the vicinity of the center of the electric discharge light emitting space by providing a tapered section 4a. In this way, there is provided an envelope of high light emission for high intensity discharge lamp capable of extending the surface life of the lamp, even if the electric discharge space is cylindrical.

摘要翻译： 用于高强度放电灯的陶瓷外壳包括：形成放电发光空间的圆柱形筒部1; 环形封闭部分，分别封闭筒部分1的两端; 以及毛细管部分3，用于接收放电电极以从两个封闭部分的大致中心彼此相对地突出。 外壳主要由氧化铝组成，并且通过添加MgO而形成为具有透光性。 通过设置锥形部4a，筒部1与封闭部2的边界处的筒部厚度形成为相对于放电发光空间的中心附近的厚度增加。 这样，即使放电空间是圆柱形的，也可以提供一种用于高强度放电灯的高发光包络，其能够延长灯的表面寿命。

公开(公告)号：EP0667322B1

公开(公告)日：2001-01-10

申请号：EP94925026.0

申请日：1994-08-30

申请人： TOTO LTD.

发明人： WAJIMA, Naohito, Toto Ltd. ,  BUNDO, Tetsuaki, Toto Ltd. ,  HAYASHI, Koichi, Toto Ltd.

IPC分类号： C04B35/115 ,  C04B35/645

CPC分类号： C04B35/6455 ,  C04B35/117

公开(公告)号：EP0992327A1

公开(公告)日：2000-04-12

申请号：EP99119224.6

申请日：1999-09-28

申请人： OSRAM SYLVANIA INC.

发明人： Zuk, Karlene J. ,  Neil, Jeffrey T. ,  Tarry, Christopher A.

IPC分类号： B28B7/34 ,  H01J61/82 ,  C04B35/115

CPC分类号： B28B3/003 ,  B28B7/342 ,  H01J9/245

摘要： A method of forming hollow bodies of ceramic material suitable for use as the discharge vessels of high intensity discharge lamps comprises forming a fugitive core of substantially pure graphite having a configuration matching the interior configuration of the hollow body. A flowable powder, including binders, of the ceramic material is formed and added to fill the annular space between a flexible elastomeric mold defining the outer contour and the fugitive core defining the inner contour. The ceramic powder is isostatically compressed in the mold about the core to form a sub-assembly. The sub-assembly is removed from the mold, heated at a rate and time and in a suitable atmosphere to volatilize the fugitive core, and subsequently the sub-assembly is sintered to form the hollow body.