Abstract: The instant invention relates to a process and plant for the transformation of dangerous wastes containing chromium six as contaminant into non dangerous wastes that can be stored without special care and will be degraded in the environment without time limit. The process basically consists of milling, extracting chromium six in liquid phase and under controlled conditions of stirring, time and temperature, proceeding then, through reduction, to transform the chromium six in chromium three and then precipitating as chromium trioxide, through gasification. The solid resulting from the transformation process can be used as raw material for the manufacturing of firebricks or eventually for the manufacturing of bricks used in the building industry through a process not included in the instant description.

Abstract: A chemical mechanical polishing slurry for polishing a copper layer without excessively or destructively polishing a barrier layer beneath the copper layer is disclosed and includes an acid, a surfactant, and a silica sol having silica polishing particles that are surface modified with a surface charge modifier and that have potassium ions attached thereto. A method for preparing the chemical mechanical polishing slurry and a chemical mechanical polishing method using the chemical mechanical polishing slurry are also disclosed.

Abstract: Provided is a cover coating composition for a glass lining comprising a frit constituting the composition which mainly includes 65 to 75 mol % of SiO2, 2 to 8 mol % of ZrO2, 10 to 22 mol % of R2O where R represents Li, K, or Cs, and 2 to 12 mol % of R?O where R? represents Mg, Ca, Sr, or Ba, and the frit is free of Na2O, and said cover coating composition for a glass lining may further contain a metal fiber.

Abstract: The invention relates to a pane that has undergone a chemical toughening operation so as to have an alkali-metal-ion concentration gradient from its surface over an exchange depth of at least 100 ?m, a surface stress of at least 200 MPa, and a strain point at the core of at least 550° C. The pane can be used especially in the field of domestic cooking, as a pyrolytic oven door, stove, fire guard, flue insert, and more generally for separating two gaseous atmospheres at different temperatures. The pane is particularly resistant to heat shocks.

Abstract: PCBs are removed from contaminated media using a treatment system including zero-valent metal particles and an organic hydrogen donating solvent. The treatment system may include a weak acid in order to eliminate the need for a coating of catalytic noble metal on the zero-valent metal particles. If catalyzed zero-valent metal particles are used, the treatment system may include an organic hydrogen donating solvent that is a non-water solvent. The treatment system may be provided as a “paste-like” system that is preferably applied to natural media and ex-situ structures to eliminate PCBs.

Abstract: An ink-jet recording method includes ejecting a droplet of an ink composition containing a metal pigment and optically transparent spherical particles with an ink-jet recording apparatus, the ink composition having an optically transparent spherical particle content of 0.5% to 5% by mass, and attaching the droplet to a recording surface of a recording medium having an average surface roughness Ra of 3 ?m or more, thereby recording an image.

Abstract: A chemical-mechanical planarization composition containing surface-modified abrasive particles such as silica where at least a portion of the surface of the particles has bound thereto a surface-modifying aluminum-containing stabilizer and fluoride that is used to polish semiconductor substrates. The use of a CMP slurry containing surface-modifying aluminum-containing stabilizer and fluoride bound to a silica abrasive provides high metal polishing rates relative to the removal rate of a dielectric.

Abstract: The present invention relates to processes for the production of monodisperse SiO2 particles by hydrolytic polycondensation of tetraalkoxysilanes and/or organotrialkoxysilanes, in which the hydrolytic polycondensation is carried out in a medium comprising water, one or more solubilizers and one or more amines, and in which highly monodisperse, non-porous particles are obtained. The present invention likewise relates to powders obtainable by the processes, and to the use thereof.

Abstract: The invention relates to a hydrophobic fumed silica which is obtained by grinding a fumed silica which, as a result of silanization, has trimethylsilyl groups fixed on the surface; and to coating formulations comprising this silica.

Abstract: A method of producing reduced volatility of urea fertilizers comprising: dissolving N-(n-butyl)-thiophosphoric triamide (NBPT) in an amino alcohol having the formula 1—(H)x—N—((CH2)m—OH)n where m is 1-3, x is 0 or 1, and n is 2 when x is 1 and 3 when x is 0: or the formula 2—(H)y—N—((CH2)—CHOH—CH3)z such that the length of the carbon chain where the secondary hydroxyl group is located is 3, y is 0 or 1, and z is 2 when y is 1 and 3 when y is 0 to form an NBPT solution; and combining a urea fertilizer in granular or liquid form with the NBPT solution.

Abstract: An object of the present invention is to provide a method of efficiently leaching copper from a copper sulfide ore containing chalcopyrite or enargite as a main constituent under versatile conditions for actual operation. A method of leaching copper from a copper sulfide ore, characterized by comprising using, as a leaching solution, a sulfuric acid solution containing iodide ions and ferric (III) ions in an excessive amount relative to the iodide ions and leaching copper from a copper sulfide ore; or a method of leaching copper from a copper sulfide ore, characterized by comprising leaching copper from a copper sulfide ore with the use of a leaching solution further containing water-soluble ligands such as chloride ions that can stabilize ferric (III) ions in addition to the above components, is provided.

Abstract: N-heterocyclic functionalized polymers and methods of use in fuel cells. Phenoxy-substituted polyphosphazenes and phosphazene trimers functionalized with azoles can provide polymer electrolyte membranes with high thermal stability coupled with a large number of proton binding sites per monomer unit.

Abstract: A transmitting optical element of polycrystalline material that includes crystallites of magnesium spinel MgAl2O4 or lutetium-aluminum garnet Lu3Al5O12, wherein the polycrystalline material includes an average total concentration of foreign element contamination caused by Y, Sc, Co, Ni, Zr, Mo, Sn and/or Nb of less than 50 ppm, preferably of less than 20 ppm, and more preferably of less than 15 ppm.

Abstract: A method for making a higher silane from a lower silane comprises heating a lower silane containing stream without exposing it to temperatures more than 20° C. more than the maximum temperature of a first reaction temperature range. The heated lower silane containing stream is introduced into a first reaction zone and allowed to react. The method further comprises mixing a first gaseous mixture from the first reaction zone with a higher silane containing stream and introducing the mixed streams into a second reaction zone operating within a second reaction temperature range. A second gaseous mixture exiting the second reaction zone is separated into various streams. One stream containing unreacted lower silanes is recycled to an earlier heating step and first reaction zone. The higher silane containing stream is mixed with the first gaseous mixture. Average residence time is low to prevent decomposition and formation of undesired silane byproducts.

Abstract: A mixed quartz powder contains quartz powder and two or more types of doping element in an amount of from 0.1 to 20 mass %. The aforementioned doped elements include a first dope element selected from the group consisting of N, C and F, and a second dope element selected from the group consisting of Mg, Ca, Sr, Ba, Sc, Y, Ti, Zr, Hf, the lanthanides and the actinides. The “quartz powder” is a powder of crystalline quartz or it is a powder of glassy SiO2 particles. It is made form natural occurring quartz or it is fabricated synthetically. The “quartz powder” may be doped. The compounding ratio of the total amount (M1) of the aforementioned first elements and the total amount (M2) of the aforementioned second elements as the ratio of the number of atoms (M1)/(M2) is preferably from 0.1 to 20. Al as well as the aforementioned doped elements is preferably included in a mixed quartz powder of this invention.

Abstract: A chemical mechanical polishing aqueous dispersion includes (A) abrasive grains having a pore volume of 0.14 ml/g or more, and (B) a dispersion medium.

Abstract: A glass-ceramic composite encapsulation material composed of glass matrix materials of SiO2, Al2O3, BaO and B2O3, and at least one glass filler selected from the group consisting of kaliophilite (KAlSiO4), leucite (KAlSi2O6), magnesium oxide (MgO). The glass-ceramic composite encapsulation material according to the invention comprises a high temperature type glass matrix (softening point: 750-850° C.) and a intermediate temperature type glass matrix (softening point: 650-750° C.), and glass filler mixed therein, wherein said glass filler in the high temperature type glass matrix comprises 5% to 20% by volume of the total volume of said glass matrix and glass filler, and the glass filler in the intermediate temperature type glass matrix comprises 0% to 40% by volume of the total volume of said glass matrix and glass filler, and wherein said glass filler has an effect of adjusting the expansion coefficient.

Abstract: To provide a high purity Yttria sintered bodies having a high strength, a low dielectric loss and high plasma corrosion resistance of halogen gas during wide range surface roughness (Ra). An Yttria sintered body having a dielectric loss tan ? of 1×10?4 or less in the frequency range from 1 to 20 GHz, wherein the Yttria sintered body contains Yttria of 99.9% by mass or more, has a porosity of 1% or less and an average crystal grain size of 3 ?m or less, and the cumulative frequency ratio calculated from the following formula (1) is 3 or less: Cumulative frequency ratio=D90/D50. In the above-described formula (1), the meanings of the individual symbols are as follows: D90: The crystal grain size (?m) at which the cumulative number of grains as calculated from the smaller grain size side is 90% in the grain size distribution of the crystal grains in terms of the number of grains.

Abstract: Provided is an optically uniform and high-quality optical glass that is free from the occurrence of striae when a precision press-molding preform is produced therefrom, and that is a fluorine-containing glass having a refractive index nd(1) wherein the refractive index nd(1) and a refractive index nd(2) are substantially equivalent to each other, said refractive index nd(2) being a refractive index of the fluorine-containing glass after the fluorine-containing glass is re-melted in a nitrogen atmosphere at 900° C. for 1 hour, cooled to its glass transition temperature and then cooled to 25° C. at a temperature decrease rate of 30° C./hour.

Abstract: Provided is iron silicide powder in which the content of oxygen as the gas component is 1500 ppm or less, and a method of manufacturing such iron silicide powder including the steps of reducing iron oxide with hydrogen to prepare iron powder, heating the iron powder and Si powder in a non-oxidizing atmosphere to prepare synthetic powder containing FeSi as its primary component, and adding and mixing Si powder once again thereto and heating this in a non-oxidizing atmosphere to prepare iron silicide powder containing FeSi2 as its primary component. The content of oxygen as the gas component contained in the iron silicide powder will decrease, and the iron silicide powder can be easily pulverized as a result thereof. Thus, the mixture of impurities when the pulverization is unsatisfactory will be reduced, the specific surface area of the iron silicide powder will increase, and the density can be enhanced upon sintering the iron silicide powder.