Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 7799269 | Method of sintering AIN under a methane-containing nitrogen atmosphere The present method uses a methane-containing nitrogen gas sintering atmosphere to sinter aluminum nitride (AlN) to a high transmittance. The methane gas replaces the solid carbon charge material used in prior art sintering methods as the source of gaseous carbon. Th... | 09/21/2010 |
| 7517491 | Processes and methods of making boron carbide High-density components and products as well as processes for making high-density components and products are disclosed. One exemplary component, among others, includes a boron carbide component comprised of a homogeneous boron carbide powder. The component has at l... | 04/14/2009 |
| 7387761 | Method for manufacturing a glass infiltrated metal oxide infrastructure The invention relates to a method for manufacturing a composite of a porous metal oxide infrastructure and a glass infiltrated in the pores of the infrastructure, wherein the method comprises at least the following steps: providing a glass which is suitable for infi... | 06/17/2008 |
| 7371704 | Sintered bodies of yttrium-aluminum garnet, a method of producing the same and sintering aid therefor An object of the present invention is to lower the sintering temperature required for a sintered body of yttrium-aluminum garnet, to improve the corrosion resistance of the sintered body and to prevent the reduction of the transmittance thereof. A sintered body of y... | 05/13/2008 |
| 7276130 | Production method of multilayer ceramic electronic device A method of producing a multilayer ceramic electronic device, having a firing step for firing a pre-firing element body wherein a plurality of dielectric layers and internal electrode layers containing a base metal are alternately arranged, characterized in that the... | 10/02/2007 |
| 7214342 | Method of making a composite silicon carbide A method for manufacturing a silicon carbide composite body and includes the steps of forming a slurry including silicon carbide and a carbonaceous precursor, adding to the slurry composite granules containing a carbonaceous binder and carbon black, drying the slurr... | 05/08/2007 |
| 7150850 | Process for producing silicon carbide sinter jig The present invention provides a sintered silicon carbide jig production method capable of simply increasing the purity of a sintered silicon carbide jig. A method of producing a sintered silicon carbide jig comprising a process in which a second sintered body is he... | 12/19/2006 |
| 7118706 | Method of sealing a silicon nitride filter A method for sealing a silicon nitride filter having a generally columnar outer shape and a plurality of through-holes mutually parallel to one another, extending between the opposing end surfaces, which comprises selectively packing a composition containing metal s... | 10/10/2006 |
| 7067085 | Black ceramic sinter with low thermal expansion and high specific rigidity and process for producing the same This invention provides a black low thermal expansion high specific rigidity ceramic sintered body having a black tone, manifesting very small thermal expansion at room temperature and abounding in rigidity and specific rigidity, and a method for the production ther... | 06/27/2006 |
| 7063813 | Stacked ceramic body and production method thereof This invention provides a stacked ceramic body that prevents reaction between components of dielectric layers and components of electrode layers of an unsintered stacked body during sintering and in which both components do not easily form a liquid phase, and a prod... | 06/20/2006 |
| 7041615 | Dielectric composition, method of manufacturing a ceramic multilayer element, and electronic device The dielectric composition contains a mixture of a ceramic composition containing BaaREbTicO3, wherein RE represents a rare earth element, with 0.05≦a≦0.25, 0.525≦b≦0.70, 0.85≦c≦1.0, and 2a+3b+4c=6, and free fr... | 05/09/2006 |
| 6887421 | Method for making a silicon carbide resistor with silicon/silicon carbide contacts by induction heating A method for bonding an electrically conductive silicon carbide structure to an electrically conductive siliconized silicon carbide structure by temporarily securing the siliconized silicon carbide structure to the silicon carbide structure; placing the silicon carb... | 05/03/2005 |
| 6808656 | Method of producing a nuclear fuel sintered body A nuclear fuel sintered body is produced from a powder which contains at least one fissile heavy metal oxide. During the further treatment of the powder over the course of the process preceding the sintering operation, a dopant that contains at least 100 ppm of an i... | 10/26/2004 |
| 6777360 | Ceramic material, method of producing same, and formed product thereof A ceramic material suitable for use in production of paving tiles, construction tiles, flooring in offices, flooring in machinery plants and so forth is obtained by a method comprising steps of mixing defatted bran derived from rice bran with a thermosetting resin b... | 08/17/2004 |
| 6723274 | High-purity low-resistivity electrostatic chucks The volume resistivity of a body consisting essentially of aluminum nitride is reduced by exposing the body to a soak temperature of at least about 1000° C. in an atmosphere deficient in nitrogen, such as an atmosphere consisting essentially of argon. The body can ... | 04/20/2004 |
| 6663828 | Sintering method and apparatus using centrifugal force A method and an apparatus for sintering a compact of particulate material for a ceramic or of particles of a metal, or a ceramic precursor film, wherein the sintering is performed by heating and burning the compact or the ceramic precursor film while appl... | 12/16/2003 |
| 6592798 | Method for preparing eutectic ceramics A method for advantageously producing sintered eutectic ceramics having a homogenous and dense structure, in particular, a eutectic containing a rare earth aluminate compound. The method allows eutectic powder of alumina and a rare earth aluminate compoun... | 07/15/2003 |
| 6488885 | Health support device and method of producing the same A health support device having a lamination of a semiconductor film on a surface of a partially-reduced sintered material of titanium oxide. The semiconductor film is preferably a p-type semiconductor film of silicon or germanium. The partially-reduced si... | 12/03/2002 |
| 6436333 | Method for manufacturing molded articles from a ceramic composite structure A method for manufacturing molded articles from a ceramic composite structure, in particular from a combination of tri-silicon tetranitride and a metal silicide, in which gas pressures up to 100 bar are used and the sintering additive content can be reduc... | 08/20/2002 |
| 6428741 | Aluminum nitride sintered body and method of preparing the same Provided is an aluminum nitride sintered body excellent in thermal shock resistance and strength and applicable to a radiating substrate for a power module or a jig for semiconductor equipment employed under a strict heat cycle. An aluminum nitride sinter... | 08/06/2002 |
| 6387834 | Sintered silicon carbide body and method for producing the same A method for producing a sintered silicon carbide body which has excellent strength and the like and in which cracking and breaking are prevented is provided. In the method for producing a sintered silicon carbide body, metallic silicon is, in a vacuum at... | 05/14/2002 |
| 6368468 | Zirconia based article, use of such an article as a wear resistant exterior part for a wristwatch and method for obtaining such an article A zirconia based article having a core of ZrO2 and/or partially reduced ZrO2, is characterized in that it includes, over at least part of its surface, a superficial layer integral with the article, the thickness of the superficial la... | 04/09/2002 |
| 6358441 | Cubic garnet host with PR activator as a scintillator material A transparent scintillator material for rapid conversion of exciting radiation, such as x-rays, to scintillating radiation. The scintillator material has a cubic garnet host, and has praseodymium as an activator. The scintillator material may be a polycry... | 03/19/2002 |
| 6346496 | Composite material for positive temperature coefficient thermistor, ceramic for positive temperature coefficient thermistor and method for manufacturing ceramics for positive temperature coefficient thermistor A ceramic for the PTC thermistor having a resistivity at room temperature of 5 Ω.multidot.cm or less, static withstanding voltage of 60 V/mm or more and temperature resistance coefficient of 9.0 %/° C., having small dispersion of the resistance, is comp... | 02/12/2002 |
| 6291376 | Bimodal silicon nitride BAS ceramic composites A composition and method of fabricating pressureless sintered 70 volume % silicon nitride--30 volume % barium aluminum silicate ceramic composites. The composites are made from 70 volume % silicon nitride, containing varying amounts and size distributions... | 09/18/2001 |
| 6197247 | Molybdenum disilicide composites Molybdenum disilicide/.beta.'-Si.sub.6-z Al.sub.z O.sub.z N.sub.8-z, wherein z=a number from greater than 0 to about 5, composites are made by use of in situ reactions among .alpha.-silicon nitride, molybdenum disilicide, and aluminum. Molybdenum disilici... | 03/06/2001 |
| 6187256 | Method of producing a conductive silicon carbide-based sintered compact A process is described for producing a conductive sintered body based on silicon carbide, in which a) silicon carbide particles, optionally pretreated with a surface modifier, are dispersed in an aqueous and/or organic medium and positive or negative surf... | 02/13/2001 |
| 6156175 | Method for producing electrochemical element and electrochemical element A method for producing a NOx sensor comprises the steps of forming electrodes on ceramic green sheets, and stacking and integrating the ceramic green sheets into one unit followed by sintering to prepare a substrate, wherein an oxygen concentration is con... | 12/05/2000 |
| 6099793 | Method for firing ceramic honeycomb bodies A method of firing a green cordierite-ceramic honeycomb structural body containing a carbonaceous material, for example, an organic binder, comprising a two phase process. The first phase comprises firing the green honeycomb structural body in a firing at... | 08/08/2000 |
| 6099794 | Process for production of silicon nitride material A silicon nitride sintered material includes silicon nitride and rare earth element compounds. Y and Yb are contained as the rare earth elements in a total amount of 5-7 mole % in terms of oxides, Yb/Y is 4/6 to 9/1 in terms of molar ratio of oxides, and ... | 08/08/2000 |
| 6043176 | Wear and thermal shock resistant SiAlON cutting tool material A sintered ceramic material for high speed machining of heat resistant alloys is provided comprising SiAlON grains and 0.2-20 v/o intergranular phase. At least 80 v/o of said SiAlON phase is beta SiAlON having a z-value greater than 1.0, but less than 1.5... | 03/28/2000 |
| 6017485 | Process for making a low electrical resistivity, high purity aluminum nitride electrostatic chuck A controlled dielectric loss, sintered aluminum nitride body having a density of greater than about 95% theoretical, a thermal conductivity of greater than about 100 W/m-K, and a dissipation factor measured at room temperature at about 1 KHz selected from... | 01/25/2000 |
| 5942148 | Nitride compacts A hot press method for the fabrication of doped or undoped gallium nitride compacts, and of other nitride compacts, employs as a starting material a powder mixture of the selected nitride and of a nitrogen rich salt. A preferred method for fabricating gal... | 08/24/1999 |
| 5876660 | Sintered reaction-bonded silicon nitride components Sintered reaction-bonded silicon nitride components, e.g., automotive components, are made by forming a powder mixture comprising silicon and oxide or oxide precursor additives. These additives comprise alumina and a calcium compound. The powder is formed... | 03/02/1999 |
| 5827472 | Process for the production of silicon nitride sintered body A process for the production of a silicon nitride sintered body which comprises heat-treating a stock of silicon nitride sintered body within a temperature range of from the temperature at which the internal friction of the stock exhibits a peculiar peak ... | 10/27/1998 |
| 5804521 | Process for production of a silicon nitride ceramic A silicon nitride ceramic of the present invention possesses excellent strength of the surface, including a silicon nitride and a rare earth oxide compound and being characterized in that the ratio of the transverse rupture strength, at a room temperature... | 09/08/1998 |
| 5780374 | High-strength porous silicon nitride body and process for producing the same A high-porosity and high-strength porous silicon nitride body comprises columnar silicon nitride grains and an oxide bond phase containing 2 to 15 wt. %, in terms of oxide based on silicon nitride, of at least one rare earth element, and has an SiO2 | 07/14/1998 |
| 5738820 | Sintered silicon nitride-based body and process for producing the same A sintered silicon nitride-based body comprising 20% or less by weight of a grain boundary phase and the balance being a major phase of grains of silicon nitride and/or sialon, wherein the major phase contains a grain phase of a ଲ-Si3 N | 04/14/1998 |
| 5736095 | Method of producing ceramic heater for oxygen sensor In order to produce a ceramic heater for an oxygen sensor, a method is used, which comprises the steps of: (a) molding a green cylindrical object from a ceramic material which contains a binder; (b) provisionally baking the green cylindrical object at a r... | 04/07/1998 |
| 5720919 | Al2 O3 and Y2 O3 containing silicon nitride having high mechanical strength at high temperatures A method of making a shaped part of sintered silicon nitride is disclosed which includes preparing a mixture of Si3 N4 having a BET specific surface area in the range of from 2 to 15 m2 /g, having an O2 content ... | 02/24/1998 |
