956 results about "Silicon oxidation" patented technology

Particulate sorbent compositions comprising a mixture of zinc oxide, silica, alumina and a substantially reduced valence nickel are provided for the desulfurization of a feedstream of cracked-gasoline or diesel fuels in a desulfurization zone by a process which comprises the contacting of such feedstreams in a desulfurization zone followed by separation of the resulting low sulfur-containing stream and sulfurized-sorbent and thereafter regenerating and activating the separated sorbent before recycle of same to the desulfurization zone.

A method for forming a forming a semiconductor structure is disclosed. The method may include: forming a silicon oxide layer on a surface of a substrate, depositing a silicon germanium (Si_1-xGe_x) seed layer directly on the silicon oxide layer, and depositing a germanium (Ge) layer directly on the silicon germanium (Si_1-xGe_x) seed layer. Semiconductor structures including a germanium (Ge) layer deposited on silicon oxide utilizing an intermediate silicon germanium (Si_1-xGe_x) seed layer are also disclosed.

An anti-glare glass substrate used for liquid crystal display devices is disclosed, which comprises a glass substrate; and a coating covering one side of said substrate, the coating having, on its surface, projection bodies which have round bottom surfaces and have an average bottom surface area ranging from 80 to 400 μm², the projection bodies being randomly arranged on said coating at a density of 5 or more projection bodies per an area equivalent to one pixel of the liquid crystal display device, and the coating having a surface roughness from 0.1 to 0.4 μm. The anti-glare glass substrate can be prepared by the steps of (1) preparing a coating liquid by blending a silica sol (A) consisting of an oligomer whose crosslinks are formed from [SiO_4/2] as crosslinking units and whose number average molecular weight ranges from 300 to 1000 (polystyrene conversion) and a silica sol (B) consisting of an oligomer in which silicon oxides having bonds between aryl groups and silicon atoms are formed as crosslinking units and whose number average molecular weight ranges from 500 to 1000 (polystyrene conversion); and (2) applying the resulting coating liquid onto the surface of a glass substrate according to the spin coating technique.

The invention discloses a silicon carbon composite material and a preparation method thereof, and a lithium ion battery containing the material. The preparation method of the silicon carbon composite material comprises the following steps: (1) calcining silicon powder in oxygen-containing atmosphere to obtain a composite material with silica-coated silicon; (2) coating the composite material with silica-coated silicon by carbon; (3) corroding the silica with excessive hydrofluoric acid to obtain the silicon carbon composite material. The preparation process of the silicon carbon composite material is simple; the preparation of the composite material with silica-coated silicon by partial oxidation of silicon is simple, and controllable in silicon oxidation degree; the silica layer of the material obtained after coating the composite material with silica-coated silicon by carbon is easy to remove; and a core shell structure with a certain gap between the carbon layer and the silicon is obtained. The preparation process is simple; the silicon carbon composite material prepared by the preparation method has better electrochemical properties; batteries prepared by the silicon carbon composite material have better cycle performance.

A polishing composition contains at least abrasive grains and water and is used in polishing an object to be polished formed of a substrate material for optical devices, a substrate material for power devices, or a compound semiconductor material. The abrasive grains have a zeta potential satisfying the relationship X×Y≦0, where X [mV] represents the zeta potential of the abrasive grains measured in the polishing composition and Y [mV] represents the zeta potential of the object to be polished measured during polishing using the polishing composition. The abrasive grains are preferably of aluminum oxide, silicon oxide, zirconium oxide, diamond, or silicon carbide. The object to be polished is preferably of sapphire, gallium nitride, silicon carbide, gallium arsenide, indium arsenide, or indium phosphide.

The invention provides a membranous layer composite structure of toughened low-radiation coated glass with a double-silver composite structure; toughening processing technique can be carried out after coating without influence on quality of products; silicon nitride (Si3N4) + ZnO is used as a composite dielectric layer of a base layer; one or more of tin oxide (SnO2), titanium oxide (TiO2), silicon nitride (Si3N4), and an absorbing layer of niobium oxide (Kb2O5) with ZnO are selected to form a composite dielectric layer of a middle layer; and the thicknesses and membranous components of other layers are reasonably selected, so as to prepare the toughened low-radiation coated glass with the double-silver composite structure which can undergo high-temperature heat processing.

The invention relates to a preparation method forming a protective film by an alloy surface in-situ oxidation reaction by means of precision control. The compact and stable oxide protective film of a three-layer structure is formed on the surfaces of materials by means of control of oxygen partial pressure and oxidation temperature in an oxidation atmosphere, and comprises a MnxCr3-xO4 (0.5</=x</=1.5) spinel layer, a chromic oxidation layer and a silicon oxidation layer from outside to inside, wherein the spinel layer mainly plays a role in protection, the chromic oxidation layer can provide Cr oxides for self repair of the spinel layer, and the silicon oxidation layer serves as a protective layer and a diffusion barrier for elements among substrates. The protective film can effectively inhibit surface oxidation, carburization or coking of the materials in service, and the service life or decoking period of the materials is prolonged.

The composition of nano polyester powder coating material is composed of (wt%) 20-50% of unsaturated polyester resin, 2-5% of inorganic nano powder, 5-10% of solidifying agent, 30-50% of inorganic filling material and 0-10% of other adjuvant, in which the inorganic nano powder is titanium oxide, silicon oxide or zinc oxide, and said invented nano polyester coating layer has the advantages of goodlevelling property, uniform coating layer colour, strong resistance to UV-ray and long time for resisting ageing.

The invention discloses a preparation method of an alumina dry glue containing silicon. The preparation method comprises the following steps: mixing original clay with a weak acid and a dispersant, then carrying out a hydrothermal treatment on the mixture so as to obtain modified clay; using an acidic solution containing aluminum and an alkaline solution containing aluminum to carry out a glue-forming reaction in the modified clay slurry by adopting a combined method of a pH swing method and a parallel-flow method, and after the glue-forming process, subjecting the glue-forming reaction product to processes of filtering, washing, and drying so as to obtain the alumina dry glue containing silicon. The alumina dry glue containing silicon has the advantages of uniform particle size, concentrated pore distribution, and proper acidity, and is especially suitable for being used to prepare a heavy oil or residual oil hydro-treatment catalyst.

A processing termination detection method capable of accurately performing changeover of etch rates when a residual film thickness of a to-be-processed layer decreases to a predetermined value. A substrate processing apparatus starts first etching to form a through-hole in a single crystal silicon layer of a wafer. A processing termination detection apparatus irradiates laser light comprised of red to near-infrared light onto the wafer and performs a frequency analysis of reflected light received from the wafer. When the intensity, represented in a result of the frequency analysis, in a frequency band corresponding to residual layer interference light has exceeded a threshold value, second etching is started to remove a through hole formation portion of the single crystal silicon layer to cause a silicon oxide layer to be exposed.

A nano silicon metal composite used for a negative electrode of a lithium ion battery comprises the following parts: (a) the first component part is simple substance silicon with the content accounting for 5-75mol% of the nano silicon metal composite; (b) the second component part contains a metal element, a compound formed and a silicon oxygen compound formed by the metal element and silicon, the second component part content accounts for 25 to 95mol% of the nano silicon metal composite; and (c) the third component part is simple substance carbon with the content accounting for 0-70mol% of the nano silicon metal composite. The preparation method is as follows: a porous block, comprising silica and metal or metal oxide and the like, and a conductive negative electrode current collector are compounded as a negative electrode, graphite or an inert positive electrode is used as a positive electrode, the negative electrode and the positive electrode are placed in a mixed salt melt electrolyte using CaCl2 or CaCl2 as the main components, voltage is applied between the negative electrode and the positive electrode, current density and electrolytic quantity are controlled, silica in the porous block is electrolyzed and reduced into nano silicon, and a nano silicon metal composite material is prepared on the negative electrode.

The invention relates to a preparation method of composite carrier metal nanometer catalyst and the application. Copper is used as the main activity catalytic component; one or a plurality of the elements, cobalt, nickel, iron, cerium and lanthanum is/are used as an auxiliary activity catalytic component or components; alumina is used as the main carrier; one or a plurality of the compounds, magnesium oxide or magnesium nitrate, silica, calcium oxide or calcium nitrate, zirconia, molecular sieve is/are used as composite carrier or carriers. The composite carrier metal nanometer catalyst is prepared in the following procedures: 1.the preparation of the catalyst solution; 2. catalyst gel preparation; 3. extruded catalyst preparation. When applied in catalytic dehydrogenation method to prepare cyclohexanone, the catalyst of the invention has the advantages that: the roasted catalyst has greater specific surface area, thereby improving the activity of the catalyst; that high temperature activity and stability is greatly improved; that cyclohexanone yield reaches above 90 percent; that the conversion rate and the selectivity reaches the highest point reported in documents; and that the catalyst performs good effects in service life experiment.

The present invention discloses a hydrogenation treatment catalyst and its preparation method. It is applicable to hydrogenation treatment of heavy oil, specially hydrogenation treatment of heavy fraction. Said catalyst is prepared by loading molybdenum, nickel and phosphorus on silicon-contained aluminium oxide carrier prepared by adopting a special method, and said silicon-contained aluminium oxide carrier is prepared by adding nano silicon-containing compound, for example nano silicon dioxide. As compared with existent catalyst it has higher activity for hydrodesulfurization and hydro-denitrification.

The invention relates to a catalyst for using coal tar to prepare clean fuel oil by catalytic hydrogenation, comprising the following components in percentage by mass: 4 to 15 percent of molybdenum oxide, 3 to 9 percent of nickel oxide, 0.1 to 5 percent of cobalt oxide, 10 to 25 percent of tungsten oxide, 2.5 to 40 percent of silicon oxide and 26 to 65 percent of aluminium oxide. The preparation method of the catalyst comprises the following steps of: firstly, preparing a silicon oxide-aluminium oxide carrier, loading active components of Co, Mo, Ni and W on the carrier by an isosteric dipping method, drying, baking and forming. The catalyst can be used for the preparation of the clean fuel oil by catalytic hydrogenation of the coal tar, gasoline and diesel oil obtained from the prepared fuel oil after being separated respectively meet the national standard of 93# gasoline and 0# diesel oil.

The invention discloses a methanation catalyst of carbon oxides containing nickel, the methanation catalyst contains active components of a) nickel oxide, b) tungsten oxide and/or molybdenum oxide, and c) at least one active component which is selected from alkali metal oxides, alkaline earth metal oxides and rare earth metal oxides which are loaded on a carrier of the oxides, and the carrier of the oxides is aluminium oxide, silicon oxide, titanium oxide, zirconium oxide or the mixture thereof. The catalyst of the invention has very high activity at low temperature, high anti-poisoning capacity and thermal stability and broad application prospect.

A silicon nitride heat body is prepared from silicon nitride of 70-95%, Ytterbium oxide of 0.1-10%, aluminum nitride of 0-5%, boron nitride of 0-5 %, aluminum oxide of 0.1-10%, silicon oxide of 0.1-10%, cerium oxide of 0.1-10% and magnesium oxide of 0.1-10%. Its preparing method includes weight out raw materials in weight radio as said preparation and ball-grinding them for 2-48hr., drying and dry-pressing them to be biscuit, placing heat wire in biscuit for making it be green bodies being set in furnace for depasting, placing green bodies into graphite crucible and burying it in silicon nitride at furnace temperature of 1500-1800 deg.c for sintering of 0.5-4hr..

The invention discloses an efficient passivation contact crystalline silicon solar cell preparation method, which belongs to the technical field of solar cells. A silicon oxide layer which should be etched off and is formed in a diffusion process is used as a barrier layer. The barrier layer is no longer a thin film which is additionally deposited. The preparation process of a cell is greatly optimized. The cost is reduced. According to the preparation method provided by the invention, high open-circuit voltage of the cell is ensured, and at the same time a filling factor of the cell is greatly improved; the photoelectric conversion efficiency of the cell is effectively improved; and the preparation method has the advantage of simple process, and is suitable for large-scale production.