1374 results about "Volume density" patented technology

Disclosed is a polycrystalline diamond or diamond-like element with greatly improved wear resistance without loss of impact strength. These elements are formed with a binder-catalyzing material in a high-temperature, high-pressure (HTHP) process. The PCD element has a body with a plurality of bonded diamond or diamond-like crystals forming a continuous diamond matrix that has a diamond volume density greater than 85%. Interstices among the diamond crystals form a continuous interstitial matrix containing a catalyzing material. The diamond matrix table is formed and integrally bonded with a metallic substrate containing the catalyzing material during the HTHP process. The diamond matrix body has a working surface, where a first portion of the interstitial matrix in the body adjacent to the working surface is substantially free of the catalyzing material, and a second portion of the interstitial matrix in the body adjacent to the working surface contains the catalyzing material. The first portion of the interstitial matrix and the second portion of the interstitial matrix have substantially the same impact strength.

Embodiments of a gas distribution plate for distributing gas in a processing chamber are provided. In one embodiment, a gas distribution assembly for a plasma processing chamber comprises a diffuser plate with gas passages passing between its upstream and downstream sides and hollow cathode cavities at the downstream side of the gas passages. The downstream side of the diffuser plate has a curvature to improve the thickness uniformity and film property uniformity of thin films deposited by PECVD, particularly SiN and amorphous silicon films. The curvature is preferably described by an arc of a circle or ellipse, the apex thereof located at the center point of the diffuser plate. In one aspect, the hollow cathode cavity volume density, surface area density, or the cavity density of the diffuser increases from the center of the diffuser to the outer edge. Methods for manufacturing such a diffuser plate are also provided.

The invention relates to a three-dimensional carbon fiber based aerogel material and a preparation method thereof. The preparation method comprises the following steps of: first, dispersing fiber in a solvent to form a turbid liquid; then, curing the turbid liquid to form a cured block; then, removing the cured solvent in the cured block to form an uncrosslinked fiber based aerogel; and crosslinking and stabilizing the uncrosslinked fiber based aerogel and pre-oxidizing and carbonizing to obtain the three-dimensional carbon fiber based aerogel material. The product is a three-dimensional network-shaped material formed by carbon fibers in a penetrated and staggered mode. The fiber crosslinking points show effective bonding and interconnection of bonding effect of non-hydrogen bond. The volume density is 0.1-500mg / cm<3>, the average aperture is 0.01-200mu m, and the specific surface area is 0.2-2000m<2> / g. The preparation process is simple and the raw material limit is less. The three-dimensional carbon fiber based aerogel product has good flexibility, connectivity and conductivity, and has a wide application prospect in many fields.

The invention relates to a preparation method of a three-dimensional fiber-based aerogel catalyst carrier and a product thereof. The preparation method comprises the following steps of: firstly dispersing fibers in solvents to form turbid liquid; secondly curing the turbid liquid to form cured pieces; thirdly removing cured solvents to form non-crosslinked fiber-based aerogel; finally carrying out crosslinking stabilization treatment and then carrying out activation treatment, thus obtaining the three-dimensional fiber-based aerogel catalyst carrier. The product is a three-dimensional network-shaped material formed through mutual penetration and stagger of fibers. The fiber crossing points are effectively interconnected through non-hydrogen-bond bonding. The three-dimensional fiber-based aerogel catalyst carrier has volume density of 0.1-500mg / cm<3>, average pore size of 0.01-2000mu m and specific surface area of 0.2-2000m<2> / g. The preparation method and the product have the advantages that the preparation process is simple; the raw material limitations are less; and the aerogel catalyst carrier product has good flexibility, connectivity and catalyst supporting capacity and has broad application prospects in the catalytic application field.

The invention provides an aluminum-carbon sliding brick, which comprises the following compositions: 60 to 75 percent of aggregate, 15 to 30 percent of powder, 1 to 6 percent of carbon element materials, 2 to 7 percent of antioxidant and 3 to 20 percent of additive. The production method for the aluminum-carbon sliding brick comprises the following steps: firstly, the powder in the raw materials is premixed and prepared into mixed powder for standby; secondly, mixing is performed according to the feeding order of granular materials, a binder and the mixed powder; thirdly, the mixture is discharged and subjected to mechanical pressing; and fourthly, a green brick is dried and prepared into the aluminum-carbon sliding plate brick by an unfired technology or a light burning technology. The method adds nitride and spinel materials in the sliding brick to substantially improve the thermal shock stability of the sliding brick, so as to achieve the level of the aluminum-zirconium-carbon sliding brick; and because the addition of Al metals is adequately increased, air holes can be filled, and the method reduces the brittleness of materials, is favorable for green brick formation, and improves the volume density, the normal temperature strength and the high temperature strength, so as to improve the oxidation resistance of the sliding brick. The aluminum-carbon sliding brick produced by the method not only has good product quality and high strength but also has simple procedure and saves the sintering cost.

The invention discloses a production process of large isotropic and isostatic high purity graphite with fine particles, which comprises the following steps: processing prefabricated powder; processing prefabricated tablets; pressing prefabricated green bodies; processing prefabricated roasting scraps; processing prefabricated smashed coke powder; processing tablets; pressing green bodies; roasting and soaking; and graphitizing and finishing. A graphite product produced by the production process provided by the invention has a large size and has the diameter being more than phi 900; the strength, the density and the elasticity of the product are improved, and the mechanical behavior physical and chemical indicators of a final product is improved; and simultaneously, the produced graphite product has the characteristics of favorable isotropic performance, uniform and delicate structure, high volume density and the like.

A holographic scatterometer with continuous readout can rapidly identify the presence of deposits (particles or other defects) on an unpatterned wafer surface and determine the volume density (size) and location. The scatterometer can also determine chemical composition of the detected deposits. The range of the deposit (particle) size to be measured is below 80 nm, which currently existing scatterometer type instruments cannot readily detect. The inspection can be achieved as an in-line stage during the processing of wafers or in situ in combination with another processing tool or as a separate off-line analysis device.

The invention provides a flyash geopolymer based porous material and a preparation process thereof. The porous material comprises the following components in parts by weight: 60-100 parts of flyash, 40-70 parts of alkali activator, 0-40 parts of admixtures, 0-5 parts of glass fibers, 2-8 parts of physical foaming agents and 0-0.8 part of chemical activators, wherein the alkali activator is alkaline mixed liquor containing various ions and comprises industrial water glass, sodium hydroxide, water, polyethylene glycol and sodium phosphate; the admixtures refer to levigated metakaolin, silicon micropowder and calcined coal gangue; the physical foaming agents include expired shampoo, an anionic surfactant sodium dodecyl sulfate (SDS), fatty alcohol polyoxyethylene ether sodium sulfate (AES) and disodium fatty alcohol polyoxyethylene ether monosulfosuccinate (AESS); the chemical foaming agents include aluminium powder, hydrogen peroxide, and the like. The porous material has adjustable volume density, fine and uniform pore diameter, low heat conductivity, high strength, the same life as buildings and good fireproof performance.