Showing papers by "Cabot Corporation published in 2007"

Photovoltaic conductive features and processes for forming same

Abstract: Photovoltaic conductive features and processes for forming photovoltaic conductive features are described. The process comprises (a) depositing a composition onto at least a portion of a substrate, wherein the composition comprises metal-containing particles having a primary particle size of from about 10 nanometers to less than 500 nanometers and including a continuous or non-continuous coating of a ceramic material; and (b) heating the composition such that the precursor composition forms at least a portion of a photovoltaic conductive feature. The metal-containing particles are preferably produced by flame spraying.

Ink jet printed reflective features and processes and inks for making them

Abstract: This invention is directed to direct write printed reflective features comprising metallic particles and/or metallic nanoparticles. Preferably, the reflective feature are formed by a direct-writing printing process, e.g., a piezo-electric, thermal, drop-on-demand or continuous ink jet printing process, using an ink comprising metallic particles, e.g., metallic nanoparticles. The invention is also directed to inks suitable for printing such reflective features using a direct write printing process and to processes for making such reflective features.

Processes for forming photovoltaic features

Abstract: Processes for forming photovoltaic features and in particular photovoltaic conductive features. In one aspect, the process comprises printing a primer material onto a substrate; etching the substrate with the primer material to form an etched substrate; printing a precursor composition onto the etched substrate, wherein the precursor composition comprises at least one of metallic nanoparticles comprising a metal or a metal precursor compound to the metal; and heating the precursor composition to form the photovoltaic feature on the substrate.

Method of preparing hydrophobic silica

Abstract: The invention provides hydrophobic surface-treated silica particles having (1) a ratio T2:T3 of about 0.4 or more, wherein T2 is the intensity of a peak having a chemical shift in the CP/MAS 29Si NMR spectrum centered within the range of -56 ppm to -59 ppm, and wherein T3 is the intensity of a peak having a chemical shift in the CP/MAS 29Si NMR spectrum centered within the range of -65 ppm to -69 ppm, and (2) a ratio (T2 +T3) / (T2 +T3 +M) of greater than about 0.05, wherein M is the intensity of a peak having a chemical shift in the CP/MAS 29Si NMR spectrum centered within the range of +7 ppm to +18 ppm. The invention also provides a method of preparing hydrophobic surface-treated silica particles.

Production of silicon through a closed-loop process

Abstract: The inventive method of producing silicon comprises reacting gaseous trichlorosilane with hydrogen to deposit silicon onto a substrate and to produce silicon tetrachloride by product, vaporizing the silicon tetrachloride by-product to form gaseous silicon tetrachloride, converting the gaseous silicon tetrachloride too finely divided silicon, forming a silicon melt by melting the finely divided silicon, and forming solid silicon from the silicon melt.

Carbon blacks having low PAH amounts and methods of making same

Abstract: Carbon blacks, such as rubber blacks, having a low PAH concentration are described. Furthermore, elastomeric or rubber compositions containing the carbon black of the present invention are further described, as well as methods of making carbon black having a low PAH concentration.

Roll-to-roll manufacturing of electronic and optical materials

Abstract: An apparatus and a method for manufacturing electrical and optical materials by ink-jet printing of electronic ink(s) onto a flexible substrate are provided The apparatus includes a flexible substrate, a first roll and a second roll, a printing head for depositing a electronic ink onto the substrate according to a predetermined pattern, and a drying station for drying an amount of deposited electronic ink Each roll is reversibly configured for feed or takeup of the substrate When dry, the deposited electronic ink forms one of an electronic material, an optical material, a display, and a fuel cell electrode The apparatus may also include a second printing head configured for depositing a second electronic ink onto the substrate after the first ink has dried The apparatus may be configured to rewind the substrate prior to deposition of the second ink, or to reverse the feed/takeup direction of the rolls

Surface-treated metal oxide particles

Abstract: The invention provides metal oxide particles surface-treated with at least one alkoxysilane compound, methods of making such, and toners comprising same.

Printable reflective features formed from multiple inks and processes for making them

Abstract: The invention relates to reflective and non-reflective features formed from multiple inks. In one embodiment, the printed feature comprises a substrate (1) having a first region(2) and a second region(3), the first (2) and second(3) regions having different surface characteristics; a first printed element (14) disposed on the first region (2); and a second printed element (15) disposed on the second region(3), wherein the first printed element (14) is more adherent than the second printed element (15) to the first region (2). In another embodiment, the printed feature comprises multiple layers formed from different inks exhibiting enhanced durability. The invention is also to processes for forming these features, preferably through a direct write printing process.

Metal-containing nanoparticles, their synthesis and use

Abstract: A powder batch is described comprising single crystal metal-containing particles having a crystal size of less than 50nm as measured by X-ray diffraction and having a weight average particle size of from about 10 nanometers to less than 100 nanometers as measured by transmission electron microscopy and including a continuous or non-continuous coating of a ceramic material. The powder batch is preferably produced by flame spraying.

Inkjet Ink Compositions Comprising Polymeric Dispersants Having Attached Chromophore Groups

Abstract: The present invention relates to an inkjet ink composition comprising a liquid vehicle, a pigment, and a polymeric dispersant. In one embodiment, the pigment comprises a colorant having the formula A-(B)x or is a carbon black pigment and the polymeric dispersant comprises a polymeric, group and at least one group having the formula - A'-(B)y(C)z, wherein A and A' are organic chromophore groups. In a second embodiment, the polymeric dispersant comprises a polymeric group and an organic chromophore group capable of interacting with the pigment.

Low viscosity, high particulate loading dispersions

Abstract: The present invention relates to dispersions comprising particulate materials and a solvent, with an optional dispersant. The solvent has a low dielectric constant, and the particulate material is present at high loading levels. The resulting dispersion has been found to be stable and have a low viscosity, even at high particulate material loadings. Various uses for these dispersions are also disclosed.

Solderable pads utilizing nickel and silver nanoparticle ink jet inks

Abstract: A system and a method are provided for ink-jet printing a solderable conductive pad onto a substrate. The system comprises at least one print head and a curing station for curing an ink deposited onto the substrate. The system is configured to: deposit at least a first layer of a first ink onto the substrate; cure the first layer of the first ink; deposit at least an intermediate layer of a second ink on top of the cured first layer of the first ink; cure the intermediate layer of the second ink; deposit at least a last layer of the first ink on top of the cured intermediate layer of the second ink; and cure the last layer of the first ink. The first ink has a relatively high conductivity. The second ink has a relatively low conductivity. The first layer, the intermediate layer, and the last layer may be arranged such that when solder is applied to the last layer, the solder is prevented from leaching through to the first layer.

Printed resistors and processes for forming same

Abstract: The invention is to printed resistors and processes for forming same. The resistors comprise a conductive phase, preferably comprising conductive nanoparticles, and a resistive phase. In the processes of the invention, a resistor may be formed from a single ink or a plurality of inks. In the single ink embodiment, an ink is deposited which comprises a conductive phase precursor, a resistive phase precursor and a vehicle. The vehicle in removed and the conductive and resistive phase precursors are converted to a conductive phase and a resistive phase, respectively. In the multiple ink embodiment, a first ink comprising the conductive phase precursor and a first vehicle and a second ink comprising the resistive phase precursor and a second vehicle are deposited on the substrate. The vehicles are removed and the conductive and resistive phase precursors are converted to a conductive phase and a resistive phase, respectively.

Processes. framed membranes and masks for forming catalyst coated membranes and membrane electrode assemblies

Abstract: A process for preparing catalyst coated membranes and membrane electrode assemblies for use in direct methanol fuel cells is provided. Cathode and anode layers are formed by spraying catalyst-containing inks onto a novel framed electrolytic membrane to form a catalyst coated membrane. The spraying process optionally employs one or more masks, which carefully control where the catalyst-containing ink is deposited. Following application of the cathode and anode layers, diffusion layers are prepared and inserted onto the catalyst coated membranes, and pressed to form membrane electrode assemblies.

Reflective layers for electronic devices

Abstract: Reflective electronic layers are provided for electronic devices, such as electroluminescent lamps, photovoltaic devices, and light emitting diodes. Processes for forming such reflective layers are also provided. The reflective layers comprise metallic particles that optionally are coated.

Substantially transparent material for use with light-emitting device

Abstract: The invention provides a substantially transparent material comprising particles of an inorganic titanate or an inorganic zirconate and at least one compound, wherein the particles are uniformly dispersed in the at least one compound, and wherein the particles are bonded to the at least one compound via at least one surface functional group of the particles. The invention also provides a light emitting device comprising a light emitting diode encapsulated with the substantially transparent material.

Printable Features Formed from Multiple Inks and Processes for Making Them

Abstract: The invention relates to reflective and non-reflective features formed from multiple inks. In one embodiment, the printed feature comprises a substrate having a first region and a second region, the first and second regions having different surface characteristics; a first printed element disposed on the first region; and a second printed element disposed on the second region, wherein the first printed element is more adherent than the second printed element to the first region. In another embodiment, the printed feature comprises multiple layers formed from different inks exhibiting enhanced durability. The invention is also to processes for forming these features, preferably through a direct write printing process.

Cyclic-treated metal oxide

Abstract: This invention provides metal oxide particles surface-treated with a cyclic silazane and a hydrophobicity-imparting agent, methods of making such, and toner compositions comprising the same.

Modified colorants with aliphatic poly-acid groups

Abstract: Modified colorants which can be pigments or dyes are described wherein the colorant has attached at least one aliphatic poly-acid group. Ink and inkjet ink compositions, formulations, and systems are further described, as well as methods of generating a printed image.

Toner composition and method of preparing same

Abstract: The invention provides a toner composition comprising toner particles and composite metal oxide particles comprising a core consisting of a first metal oxide and a coating consisting of a second metal oxide. The core is substantially spherical and non-aggregated. The invention also provides a method for the preparation of a toner composition.

Pigment dipsersions comprising functionalized non-polymeric dispersants

Abstract: The present invention relates to pigment dispersions comprising a liquid vehicle, a pigment, and a non-polymeric dispersant comprising at least one functional groups. Various embodiments of the functional group are disclosed. For each of these embodiments, preferably the functional group has a defined calcium index value. Also disclosed are various uses for these dispersions, including inkjet ink compositions.

Security features and processes for forming same

Abstract: Security features, e.g., reflective security features, and processes for forming security features are described. The security features comprise crystalline metal-containing particles having a primary particle size of from about 10 nanometers to less than 500 nanometers and including a continuous or non-continuous coating of a ceramic material. Inks comprising such crystalline metal-containing particles are also described. The crystalline metal-containing particles are preferably produced by flame spraying.

Polyimide insulative layers in multi-layered printed electronic features

Abstract: Processes for forming polyimide coatings during the formation of printed electronic features. In various embodiments, the processes include the steps of: (a) applying a polyimide precursor ink comprising a polyimide precursor onto a substrate or to an electronic feature disposed thereon, preferably through a direct write printing process, e.g., ink-jet printing, (b) converting the polyimide precursor to a polyimide coating; and (c) optionally forming an electronic feature on the polyimide coating.

Process for the production of fumed silica

Abstract: The invention provides a process for the production of fumed silica. The process comprises providing a silicon halide feedstock comprising about 80% to 100% methyltrichlorosilane, combining the silicon halide feedstock with hydrogen gas and oxygen gas to form a reactant mixture, discharging the reactant mixture out of a burner, and combusting the hydrogen gas and the oxygen gas of the reactant mixture so as to hydrolyze the silicon halide feedstock to produce fumed silica. Hydrogen (H2) is present in a mole fraction of about 0.11 or less based on the reactant mixture, and/or the velocity of the reactant mixture upon exiting the burner is about 25 m/s or more.

Security features incorporating photoluminescent phosphor powders and methods for making security features

Abstract: Photoluminescent phosphor powders and a method for making phosphor powders. The phosphor powders have a small particle size, narrow particle size distribution and are substantially spherical. The method of the invention advantageously permits the economic production of such powders. The invention also relates to improved devices, such as display devices and lighting elements, incorporating the phosphor powders.

Palladium-containing particles, method and apparatus of manufacturing palladium-containing devices made therefrom

Abstract: Provided are palladium-containing powders and a method and apparatus for manufacturing the palladium-containing particles of high quality, of a small size and narrow size distribution. An aerosol is generated from liquid feed and sent to a furnace, where liquid in droplets in the aerosol is vaporized to permit formation of the desired particles, which are then collected in a particle collector. The aerosol generation involves preparation of a high quality aerosol, with a narrow droplet size distribution, with close control over droplet size and with a high droplet loading suitable for commercial applications. Powders may have high resistance to oxidation of palladium. Multi-phase particles are provided including a palladium-containing metallic phase and a second phase that is dielectric. Electronic components are provided manufacturable using the powders.

Verfahren zum Erzeugen von verformten Metallartikeln

Abstract: Verfahren zum Erzeugen eines Metallartikels mit einer endgultigen Dicke, das umfasst: Verformen eines Metallbarrens, um eine rechteckige Tafel mit einer Lange, Breite und Dicke zu bilden, wobei sich zwei der drei Dimensionen um nicht mehr als 25% voneinander unterscheiden, erstes Walzen der rechteckigen Tafel, um eine Zwischenplatte zu bilden, wobei das erste Walzen eine Vielzahl von Walzdurchgangen umfasst, und zweites Walzen der Zwischenplatte, um eine Metallplatte zu bilden, wobei das zweite Walzen eine Vielzahl von Walzdurchgangen umfasst und wobei jeder der Walzdurchgange des zweiten Walzens eine wahre Dehnungsreduktion von ungefahr 0,06 bis 0,18 pro Durchgang vorsieht.

Tantalpulver mit glatter Oberfläche und Verfahren zur Herstellung desselben

Abstract: Tantalpulver, wobei, wenn das Tantalpulver zu einer Anode eines Elektrolytkondensators geformt wird, die Anode eine Kapazitat von 450.000 bis 800.000 μFV/g aufweist, gemessen durch das Pressen des Tantalpulvers zu Pellets mit Tantalzuleitungsdrahten, mit einer Pressdichte von 4,5 g/cm 3 , Sintern der Pellets, Anodisieren der gesinterten Pellets in einer wassrigen Phosphorsaurelosung mit einer Konzentration von 0,1 Vol.-% unter einer Spannung von 6 V und einem Strom von 90 mA/g, um anodisierte Pellets zu bilden und Prufen der Kapazitat in einer wassrigen Schwefelsaurelosung mit einer Konzentration von 30,5 Vol.-% bei einer Temperatur von 25°C unter einer Frequenz von 120 Hz und einer Spannung von 1,5 V.