111 results about "Borazine" patented technology

An apparatus, system, and method are disclosed for generating a gas. One or more liquid permeable pouches each define a cavity that contains a solid anhydrous reactant, such as a chemical hydride. A reaction chamber made of a heat, chemical and/or pressure resistant material receives the one or more pouches from a pouch feeder that transfers the one or more pouches into the reaction chamber successively at a feed rate. One or more liquid sources inject a liquid reactant into the reaction chamber so that the liquid reactant contacts a portion of the one or more pouches. The one or more liquid sources inject the liquid reactant at an injection rate that corresponds to the feed rate. A gas outlet releases a gas, such as hydrogen, oxygen, ammonia, borazine, nitrogen, or a hydrocarbon, that is produced by a reaction between the solid reactant and the liquid reactant.

The use of a material possessing a six-member borazine ring consisting of at least boron and nitrogen elements in the form of a low dielectric constant insulating film in a hard mask, a Cu diffusion barrier layer and an etching stopper which are necessary when low dielectric constant interlayer insulating films and Cu wiring in the multilayer interconnection of an LSI allows the parasitic capacity between the multilayer wirings to be suppressed and enables the ULSI to produce a high-speed operation.

Graphene, a method of fabricating the same, and a transistor having the graphene are provided, the graphene includes a structure of carbon (C) atoms partially substituted with boron (B) atoms and nitrogen (N) atoms. The graphene has a band gap. The graphene substituted with boron and nitrogen may be used as a channel of a field effect transistor. The graphene may be formed by performing chemical vapor deposition (CVD) method using borazine or ammonia borane as a boron nitride (B—N) precursor.

The invention provides a preparation method of a Cf/BN-SiC composite material. The preparation method comprises the steps: by using a carbon fiber needled felt as a reinforcement body and using a glycol dimethyl ether solution of borazine as a BN precursor, preparing a Cf/BN prefabricated component by adopting a precursor infiltration and pyrolysis process, then performing a resin solution infiltration and pyrolysis process on the Cf/BN prefabricated component, preparing a C matrix to obtain a Cf/BN-C biscuit, and finally preparing the Cf/BN-SiC composite material by virtue of a gas phase siliconizing process. The problem that a Cf/SiC composite material is poor in oxidation resistance in the prior art can be solved by adopting the preparation method provided by the invention.

Materials containing one or more borazine rings are employed as materials for electroluminescent devices. The compounds have molecular structures represented by the following formula:

in which R₁—R₆ are independently a metal; a whole or part of an optionally substituted borazine ring; hydrogen; halogen; hydroxyl; optionally substituted alkyl, cycloalkyl, aryl, acyl, alkoxy, acyloxy, amino, acylamino, aralkyl, cyano, carboxyl, thio, vinyl, styryl, aminocarbonyl, carbamoyl, aryloxycarbonyl, phenoxycarbonyl, or alkoxycarbonyl, as well as recognized donor and acceptor groups. The compounds have high thermal stability as well as hole and electron mobilities.

Interlayer insulating films 5,7 (insulating films) provided in a memory capacitor cell 8 are formed between a gate electrode 3 and a counter electrode 8C formed on a silicon wafer 1. The interlayer insulating films 5,7 comprise a borazine-based resin, having a specific dielectric constant of no greater than 2.6, a Young's modulus of 5 GPa or greater and a leak current of no greater than 1×10⁻⁸ A/cm².

A carbon fiber reinforced boron nitride composite and a preparation method thereof belong to the field of the ceramic-based composites. The carbon fiber reinforced boron nitride composite uses a carbon fiber as a reinforcement body; and the liquid borazine precursor of which the B/N atomic ratio is 1:1 is converted to a boron nitride matrix. The preparation method comprises the following steps: the carbon fiber is weaved into a three-dimensional fabric, the liquid borazine of which the B/N atomic ratio is 1:1 is completely soaked in the carbon fiber fabric at 80-120 DEG C under 1-15MPa, the temperature is kept for 10-70 hours to crosslink and solidify the liquid borazine; and the product obtained through solidifying is cracked, soaked, crosslinked and cracked again for 2-6 times to prepare the finished product. The carbon fiber reinforced boron nitride composite is a new structure/function integrating material suitable for the aviation and aerospace field and has good high temperatureresistance, oxidation resistance and ablation resistance.

The invention discloses a preparation method of a SiBN(C) ceramic fiber. The method comprises the following steps of: using alkyl amine and B-trichloroborazine as initial raw materials, and triethylamine as a precipitating agent; adding alkyl amine and TCB in a mo;ar ratio of 3:1, and an excess amount of triethylamine into a reactor for reaction; filtering products after the reaction and obtaining a filtrate which is an alkyl amino borazine monomer; carrying out polymerization to the monomer with heating; cooling to obtain a poly alkyl amino borazine precursor; adding the poly alkyl amino borazine precursor and polycarbosilane in a mass ratio of 1:15-15:1 into a toluene or a xylene solution; depriving a solvent by reduced pressure distillation and carrying out melt spinning to a hybrid precursor; and carrying out curing treatment and pyrolysis to obtain a SiBN(C) ceramic fiber. The method of the invention has a high synthesis yield and a technology thereof is simple; and the melt spinning of the precursor is completed in a general melt spinning equipment environment and without protection of expensive inert atmosphere, and has low coats and high efficiency; so as to realize large scale production.

The invention provides a method for preparing a boron nitride nanowire by cracking of a polymer. The method comprises the following steps: synthesizing a polyalkylamino borazine precursor according to the prior art: grinding the precursor under the protective condition of inert gas and screening the grinded precursor through a 1000-mesh sieve; placing the precursor powder in a graphite boat, rising the temperature to 100-200 DEG C at the speed of 3-10 DEG C/min in the presence of high-pure nitrogen in a tubular furnace, and then insulating for 1-3 hours; rising the temperature to 500-700 DEG C at the speed of 3-10 DEG/min, and then insulating for 1-3 hours; at the atmosphere of nitrogen, heating to 1000-1600 DEG C at the rising speed of 3-10 DEG C/min, then insulating for 0.5-5 hours, and then cooling along with the furnace so as to obtain the boron nitride nanowire. The diameter of the nanowire prepared by the method is about 13-18 nm and is evenly distributed, no catalyst is used, preparation temperature is low, and energy is saved, thereby reducing the cost; and the method is simple in process, is convenient for operation and is easy to achieve large scale; and as a structure reinforced material, a semiconductor material, a wave-transparent material and the like, the prepared boron nitride nanowire has a good prospect of application.

The invention concerns a method for making boron nitride fibers by drawing a polymer precursor and treating with ceramics the polymer fibers obtained by drawing. The invention is characterized in that the precursor polymer is obtained by thermal polymerization of a borazine of formula (I) wherein: R<1>, R<3>, R<4 >and R<5>, identical or different, represent an alkyl, cycloalkyl or aryl group; and R<2 >represents a hydrogen atom or an alkyl, cycloalkyl or aryl group.

The invention discloses a borazine aryne resin and a preparation method thereof. The borazine aryne resin is structurally characterized in that the polymer molecular chain contains borazine and aryl alkynyl structures. The preparation method of the resin comprises the following steps: on the basis of taking diacetylene-benzene, boron trihalide and ammonium chloride or organic primary amine as raw materials, reacting in three steps in the presence of an inert gas so as to synthesize the borazine aryne resin. The preparation method is simple in process, convenient to operate and short in reaction time, the process condition is easy to control, and the aftertreatment process is simple; the borazine aryne resin is reddish brown viscous fluid or faint yellow solid, and can be solidified in a light and thermal polymerization mode; the borazine aryne resin has excellent thermal resistance and low dielectric property, can be used for preparing an advanced resin-based composite material, can be also used as a low dielectric material, and can be widely applied to the fields of aerospace and electronic information.

The invention provides a high-temperature-resistant wave-transparent ceramic-based composite material. A preparation method for preparing the temperature-resistant wave-transparent ceramic-based composite material is further provided; the preparation method for preparing the temperature-resistant wave-transparent ceramic-based composite material comprises the following steps of (1) taking a silicon nitride fiber fabric, and conducting impregnating compound removal treatment on the surfaces of the silicon nitride fiber fabric; and (2) conducting high-pressure immersion treatment and thermal treatment on the silicon nitride fiber fabric treated in the step (1) by means of a borazine precursor to obtain the high-temperature-resistant wave-transparent ceramic-based composite material. Silicon nitride fibers are used as an enhancing phase, boron nitride converted from the borazine precursor is used as a matrix, the high-temperature-resistant wave-transparent ceramic-based composite material and the preparation method thereof are provided, and the high-temperature-resistant wave-transparent ceramic-based composite material has excellent high-temperature stability, high-temperature mechanical property, high-temperature dielectricity and ablation resistance performance.

A water-based metalworking fluid is comprised of a polymeric boron species which includes at least B, N and H, together with a surfactant operable to provide an emulsion of the boron species with water. The polymeric boron species may be a polyborane or a borazine polymer and may be configured as a polyborane or borazine polymer backbone having side chains pendent thereupon. The side chains may include silicon and/or phosphorous. The silicon may be in the form of a silane or a siloxane species, including polymeric species. Disclosed are specific compositions as well as methods for using the compositions and methods for making the compositions.