摘要:
Nematodes, and pestiferous microorganisms such as bacteria and fungi, are killed with the aid of a trihydrocarbyl tin neoalkanoate. The pesticide may be applied (e.g. to soil as a nematocide) in the form of a composition comprising solid and/or liquid inert diluents. Suitable solid diluents are talc, pyrophyllite, synthetic fine silica, attapulgus clay, kieselguhr, chalk, lime, bentonite, fullers earth, cottonseed bulbs, wheat flour, soybean flour, pumice, tripoli, wood flow, walnut shell flour and lignin. Suitable liquid diluents are water, benzene, toluene, xylene, kerosene, diesel oil, fuel oil, petroleum naphtha, acetone, methylethyl ketone, cyclohexanone, carbon tetrachloride, chloroform, trichloroethylene perchloroethylene, alkyl acetates, monomethyl ethers of mono- or di-ethylene glycol, alkanols, ethylene or propylene glycol, butyl carbitol acetate, glycerine and liquefied gases (e.g. CCl2F2 or CCl3 F). The composition may also contain surface active agents and may be applied in the form of a dust, solution, emulsion or aerosol. In examples, the trihydrocarbyl tin neoalkanate employed is tributyltin neodecanoate, neopentanoate or neotridecanoate, tripropyltin neooctanoate, tricyclohexyltin neodecanoate or triphenyltin neodecanoate.
摘要:
A barrier coating system may include a super alloy or ceramic matrix composite (CMC) substrate underneath a bond coat. The barrier coating system may also include a calcium-magnesium aluminosilicate (CMAS) resistant coating configured to protect metallic, or oxide-based or silicon based components in a harsh CMAS environment.
摘要:
A composite thermistor material, a preparation method and an application thereof. The perovskite structure oxide and the pyrochlorite structure oxide are composite by solid state reaction method, which comprise process of ball milling, drying, and calcining. Then the thermistor ceramics with high temperature resistance and controllable B value are sintered at high temperature after mould forming, then the thermistor disks are coated by platinum paste, and then the platinum wire is welded as the lead wire to form thermistor element. The thermistor of the invention can realize temperature measurement from room temperature to 1000° C. and has good negative temperature coefficient thermistor characteristics. The thermistor coefficient B can be adjusted by changing the two-phase ratio to meet the requirements of different systems.
摘要:
A thin-film thermocouple for measuring the temperature of a ceramic matrix composite (CMC) component comprises a first thermocouple leg and a second thermocouple leg deposited on a surface of a CMC component, where each of the first and second thermocouple legs has a length extending from a reference end to a working end thereof. The working ends of the first and second thermocouple legs are joined at a junction region on the surface. At least one of the first thermocouple leg and the second thermocouple leg comprises silicon carbide.
摘要:
A composite material combining—a precious metal or an alloy containing a precious metal—and a boron-based ceramic having a melting point greater than that of said precious metal and a density at most equal to 4 g/cm3.
摘要:
The invention relates to a metal ink composition for decorating non-porous substrates by means of ink-jet printing on non-porous surfaces that are subjected to a heat treatment following printing, comprising at least one organic solvent as a vehicle that is a liquid at room temperature, and at least one ligand composition formed by an organometallic compound including ligands bound to the metal element and a resin used as a ligand agent. Said composition is prepared such that the physical properties of the metal ink such as boiling temperature, drying rate, spreading of the printed drop, flash point and conductivity are suitable for obtaining the required printing quality.
摘要:
The invention relates to a method for the fabrication of composite palladium or palladium alloy membranes. The surface of the porous ceramic substrate is modified with pencil to create a uniform and smooth layer, and the membrane is deposited via electroless plating. The advantages of the pencil modification are a reduction of the substrate surface roughness and a repair of substrate surface defects, which leads to a great improvement in the membrane uniformity and hydrogen permeation performances. This method is facile and economic, and it is especially effective on low-cost macroporous ceramic substrate materials. Furthermore, this method generates almost no pollution and therefore is environmentally benign.