Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 8071496 | Silicon nitride-melilite composite sintered body and device utilizing the same A silicon nitride-melilite composite sintered body in accordance with the invention includes silicon nitride and a melilite Me2Si3O3N4, where Me denotes a metal element combining with silicon nitride to generate the melili... | 12/06/2011 |
| 8071495 | Silicon nitride body and method of manufacture A densified silicon nitride body can be formed using a lanthana-based sintering aid. The composition may exhibit properties that provide a material useful in a variety of applications that can benefit from improved wear characteristics. The composition may be densif... | 12/06/2011 |
| 7968484 | Use of additives to improve microstructures and fracture resistance of silicon nitride ceramics A high-strength, fracture-resistant silicon nitride ceramic material that includes about 5 to about 75 wt-% of elongated reinforcing grains of beta-silicon nitride, about 20 to about 95 wt-% of fine grains of beta-silicon nitride, wherein the fine grains have a majo... | 06/28/2011 |
| 7749932 | Composition, sintered product of silicon nitride, article of manufacture, and cutting method A sintered product of silicon nitride includes a crystal phase mainly having silicon nitride crystal grains and an amorphous grain-boundary phase located on the grain boundaries of the silicon nitride crystal grains. The grain-boundary phase contains lanthanum, alum... | 07/06/2010 |
| 7612006 | Conductive silicon nitride materials and method for producing the same To provide a sintered silicon nitride with conductivity and densification, an oxide of titanium group elements, such as titanium oxide, hafnium oxide, zirconium oxide and the like, aluminum oxide and/or aluminum nitride is added as needed to silicon nitride-oxidant ... | 11/03/2009 |
| 7521388 | Wear resistant member comprised of silicon nitride and process for producing the same A silicon nitride abrasion resistant member is formed of silicon nitride sintered body containing 2% to 4% by mass of a rare earth element in terms of oxide thereof as a sintering aid, 2% to 6% by mass of an Al component in terms of oxide thereof, and 2% to 7% by ma... | 04/21/2009 |
| 7402541 | Silicon nitride compositions The present invention provides silicon nitride with tungsten carbide additives in a sinterable material comprising silicon nitride and tungsten carbide, in which the silicon nitride content is a minimum of about 80% and wherein the total nitride component is about 2... | 07/22/2008 |
| 7375046 | Yttria sintered body, ceramic member using yttria sintered body, and manufacturing method of yttria sintered body A yttria sintered body is provided which includes yttria as a principal ingredient and 5 to 40 vol. % silicon nitride, and which exhibits enhanced corrosion resistance and mechanical strength. ... | 05/20/2008 |
| 7294596 | Sintered ceramic material with improved properties and method for its manufacturing A sintered ceramic material comprises a crystalline phase and an intergranular phase comprising a glass phase. The material is manufactured from a starting powder being mixed with an additive comprising one or more metal from a group of Li, Na, Mg, Ca, Sr, Ba, Sc, Y... | 11/13/2007 |
| 7244376 | Hexaboride particles, hexaboride particle dispersion, and article making use of hexaboride particles or hexaboride particle dispersion In hexaboride particles having particles of a hexaboride of at least one element (X) selected from Y, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Sr and Ca, or a dispersion of such particles, the surfaces of the hexaboride particles have physically been ... | 07/17/2007 |
| 7244686 | Bearings produced from silicon nitride substances containing sintering additives and SiO The present invention is directed to bearings produced from a silicon nitride material. The silicon nitride material consists of a sintering aid selected from the group consisting of Al2O3 and Y2O3, silicon dioxide, and op... | 07/17/2007 |
| 7208037 | Molding compound, use thereof and a method for producing an oxide-ceramic sintered body The invention proposes to produce a mixture that is shrink-resistant, or has a freely selectable degree of shrinkage, and can be used as a molding compound, and a method for producing a corresponding oxide-ceramic sintered body. The molding compound comprises an int... | 04/24/2007 |
| 7192899 | Silicon nitride sintered body having high heat conductivity and silicon nitride structural element A silicon nitride sintered body exhibiting a high heat conductivity, the silicon nitride sintered body includes a rare earth element in an amount of 2 to 17.5 mass % in terms of the oxide thereof, Fe in an amount of 0.07 to 0.5 mass % in terms of the oxide thereof, ... | 03/20/2007 |
| 7157394 | Stoichiometrically balanced silicon nitride ceramic for high performance cutting tools A silicon nitride based ceramic, that is highly effective for use as a cutting tool for the high speed machining of cast irons, that is essentially a homogeneous mixture consisting of both crystalline and whisker forms of beta silicon nitride that are interstitially... | 01/02/2007 |
| 7153484 | Porous SiNproducing method A producing method of a porous Si3N4 having high porosity and formed of Si3N4 particles having a high aspect ratio includes the following steps. A compound of a rare earth element as a first sintering agent is mixed in an ... | 12/26/2006 |
| 7141518 | Durable charged particle coatings and materials This invention concerns coatings having high surface area materials and at least one metal ion adsorbed onto the high surface area material as well as substrates having the coating and methods of applying the coating. The substrates may be films, woven fabrics or ma... | 11/28/2006 |
| 7135140 | Method of producing silicon nitride honeycomb filter A method for producing a silicon nitride honeycomb filter, which comprises heat-treating in a nitrogen atmosphere a green body comprising from 50 to 85 mass % of metal silicon particles having an average particle diameter of from 5 to 50 μm, from 5 to 30 mass % of ... | 11/14/2006 |
| 7129191 | Composition useful for preparation of dense neodymium stabilised β-silicon nitride-α-SiAlON composite The present invention consists of a synergistic mixture of Si3N4, Al2O3, AlN, SiO2 and Nd2O3. The cost effective synergistic composition is useful for the preparation of dense neodymium sta... | 10/31/2006 |
| 7109139 | Process for manufacture of dense neodymium stabilized β-SiN-α-SiAlON composite The present invention provides a process for the manufacture of dense neodymium stabilized β-Si3N4-α-SiAlON composite, wherein a synergistic composition essentially consisting of Si3N4, Al2O3, AlN, ... | 09/19/2006 |
| 7104739 | Milling disk for a floor machining appliance A milling disk for a floor machining appliance has a plurality of mounts for holding interchangeable plate-like milling tips, the milling disk being driven for rotation by the floor machining appliance and being held substantially parallel to the substructure to be ... | 09/12/2006 |
| 7056850 | Wear-resistant silicon nitride member and method of manufacture thereof The present invention provides a wear resistant member composed of silicon nitride sintered body containing 2–10 mass % of rare earth element in terms of oxide thereof as sintering agent, 2–7 mass % of MgAl2O4 spinel, 1–10 mass % of silic... | 06/06/2006 |
| 7052182 | Hydrostatic gas bearing, hydrostatic gas bearing device for use in vacuum environment, and gas recovering method for the hydrostatic gas bearing device In a hydrostatic gas bearing for use in a vacuum, in order to provide a hydrostatic gas bearing in which an increase in the quantity of gas being discharged during the movement of a moving body is reduced, the surface of a guide shaft of a fixed body and/or the surf... | 05/30/2006 |
| 7041366 | Porous silicon nitride ceramics and method for producing the same The invention provides porous silicon nitride ceramics that having uniform, fine closed pores and a manufacturing method thereof. Metal Si powder is mixed with a sintering additive, followed by thermal treatment, which is a pre-process for forming a specific grain b... | 05/09/2006 |
| 6995105 | Use of water-soluble mixed polymers as a flowing medium and/or as a hardening retarder for refractory materials which contain aluminate cement The use of a three-component water-soluble polymer comprising 5–90% by weight of a component a), preferably of the maleic acid, fumaric acid or itaconic acid type, 5–90% by weight of a component b) essentially from the group consisting of 2-acrylamido-2-methylpr... | 02/07/2006 |
| 6977233 | Sintered silicon nitride Sintered silicon nitride products comprising predominantly β-silicon nitride grains in combination with from about 0.1 to 30 mole % silicon carbide, and grain boundary secondary phases of scandium oxide and scandium disilicate. Such products have high fracture toug... | 12/20/2005 |
| 6869902 | Silicon nitride porous body and method of manufacturing the same A silicon nitride porous body (5) obtained by nitriding a molded body having metallic silicon (3) as a main component, the porous body having a porous structure with an average pore diameter of 3 μm or above, and wherein the total content of silicon a... | 03/22/2005 |
| 6861382 | Sintered silicon nitride and silicon nitride tool Sintered silicon nitride and a silicon nitride tool. The mean major axis length, the mean minor axis length, and the aspect ratio, represented by (mean major axis length/mean minor axis length) of constituent sintered silicon nitride grains in a silicon nitride tool... | 03/01/2005 |
| 6846764 | Silicon nitride porous body and method of manufacturing the same A silicon nitride porous body which is obtained by nitriding a molded body having metallic silicon as a main component and by performing a high temperature heating treatment at a temperature higher than the nitriding temperature, and which has a porous structure wit... | 01/25/2005 |
| 6846765 | Silicon nitride powder, silicon nitride sintered body, sintered silicon nitride substrate, and circuit board and thermoelectric module comprising such sintered silicon nitride substrate A silicon nitride sintered body comprising Mg and at least one rare earth element selected from the group consisting of La, Y, Gd and Yb, the total oxide-converted content of the above elements being 0.6-7 weight %, with Mg converted to MgO and rare earth elements c... | 01/25/2005 |
| 6811868 | Ceramic body and ceramic catalyst body The object of the present invention is to provide a ceramic body that can support a required amount of a catalyst component, without lowering the characteristics such as strength, being manufactured without forming a coating layer and providing a high performance ce... | 11/02/2004 |
| 6797660 | Silicon nitride wear resistant member and manufacturing method thereof Wear resistant member comprises a silicon nitride sintered body. Silicon nitride sintered body contains from 75 to 97% by mass of silicon nitride, from 0.2 to 5% by mass of titanium nitride and from 2 to 20% by mass of a grain boundary phase essentially containing S... | 09/28/2004 |
| 6784131 | Silicon nitride wear resistant member and method of manufacturing the member The present invention provides a silicon nitride wear resistant member composed of silicon nitride sintered body containing 1-10 mass % of rare earth element in terms of oxide thereof as sintering agent, wherein a total oxygen content of the silicon nitride sintered... | 08/31/2004 |
| 6749930 | Corrosion-resistive members A corrosion-resistive member is provided, including a corrosion-resistive face that is exposed to a corrosive gas causing ion bombardmemt. At least a part of the corrosion-resistive member is composed of a sintered silicon nitride body having an open porosity of not... | 06/15/2004 |
| 6737378 | Silicon nitride sintered products and processes for their production A silicon nitride sintered product comprising silicon nitride grains and a grain boundary phase, wherein the grain boundary phase consists essentially of a single phase of a Lu4Si2O7N2 crystal phase, and the composition of... | 05/18/2004 |
| 6717721 | Large effective area erbium doped fiber optical amplifier An optical waveguide amplifier fiber comprises a core region at least in part comprises Er2O3, Al2O3, GeO2 and Ga2O3. The amplifier fiber also comprises an inner clad surrounding the core r... | 04/06/2004 |
| 6670294 | Corrosion-resistive ceramic materials and members for semiconductor manufacturing Corrosion-resistive ceramic materials include a silicon based ceramic, wherein a percentage of respective metal elements other than metal elements constituting sintering agents and silicon is not more than 10 weight ppm. The corrosion-resistive ceramic ma... | 12/30/2003 |
| 6667264 | Silicon nitride sintered material and process for production thereof A silicon nitride sintered material includes a polycrystal material having silicon nitride crystal grains and a grain boundary phase. The sintered material contains a Yb element in an amount of 2 to 30% by weight in terms of its oxide and an Al element in... | 12/23/2003 |
| 6657166 | Silicon nitride sintered material and production process thereof A silicon nitride sintered material containing silicon nitride, a Group 4a through 6a element, a rare earth element, and silicon carbide, characterized in that the amount of the rare earth element as reduced to a certain oxide thereof is 5.7-10.3 mol %; t... | 12/02/2003 |
| 6645649 | Surface-coated sintered body of silicon nitride A surface-coated sintered body of silicon nitride wherein a coating layer on the surface comprises a crystalline phase of RE2 Si2 O7 and/or RE2 SiO5 (RE=rare earth element), the crystalline phase havi... | 11/11/2003 |
| 6617272 | Si3N4 sintered body with high thermal conductivity and method for producing the same An Si3 N4 sintered body produced by reactive sintering of silicon, wherein a compound of at least one element selected from the group consisting of Y, Yb and Sm is contained by 0.6 to 13% by weight as Ln2 O3 (wh... | 09/09/2003 |
