method for producing cubic boron nitride

INQUIRY

When we get your inquiries, we will send tailored catalogue, pricelist, delivery, payment terms and other required details to you by email within 24 hours.

method for producing cubic boron nitride
  • US4150098A Method of producing cubic boron nitride

    A method of producing cubic boron nitride is proposed which consists in that hexagonal boron nitride is subjected simultaneously to the action of a pressure of from about 50 kbar to about 90 kbar and a temperature of at least from about 1800° C. to about 3000° C. during a time period sufficient for formation of a cubic structure.

  • Cited by: 17
  • Method for producing cubic boron nitride Showa Denko K.K.

    A method is provided for producing cubic boron nitride, in which a mixture containing hexagonal boron nitride and a catalyst is maintained under pressure and temperature conditions that thermodynamically favor the stable presence of cubic boron nitride, thereby forming composite lumps containing cubic boron nitride, which in turn are dissolved in an alkaline solution to recover cubic boron

  • Cited by: 8
  • US7703710B2 Cubic boron nitride, method for producing

    A method for producing cubic boron nitride in which hBN is held in the presence of a catalyst substance under conditions in which cBN remains thermodynamically stable, to thereby cause hBN to undergo a phase transition to form cBN, wherein the catalyst substance contains a lithium source, a magnesium source, and a carbon source. The performance of cBN is improved even though phase

  • Cited by: 7
  • US4762729A Method of producing cubic boron nitride

    US4762729A US07/126,884 US12688487A US4762729A US 4762729 A US4762729 A US 4762729A US 12688487 A US12688487 A US 12688487A US 4762729 A US4762729 A US 4762729A Authority US United States Prior art keywords layer boron nitride substrate cubic boron outer layer Prior art date 1985-07-17 Legal status (The legal status is an assumption and is not a legal conclusion.

  • Cited by: 17
  • US7214359B2 Cubic boron nitride, catalyst for

    By using a CBN synthesis catalyst containing a CBN synthesis catalyst component coated with an organic substance for producing cubic boron nitride (CBN), the CBN can be produced at a high transformation ration and a high yield ratio. Each of the CBN grains produced through this method has a sharp shape with a highly developed (111) plane, exhibits high strength, and exhibits a small reduction

  • Cited by: 9
  • Method for producing sintered cubic boron nitride compact

    A method for producing a highly uniform and highly dense sintered cubic boron nitride compact having high hardness by sintering at a milder condition without a binder, is provided. The method

  • Cited by: 3
  • Cubic boron nitride, catalyst for synthesizing cubic boron

    By using a CBN synthesis catalyst containing a CBN synthesis catalyst component coated with an organic substance for producing cubic boron nitride (CBN), the CBN can be produced at a high transformati Login and method for producing cubic boron nitride . United States Patent 7214359

  • Cited by: 9
  • Method of producing soluble hexagonal boron nitride

    Method of producing cubic boron nitride, having light emission // 2394757. FIELD: chemistry. The invention relates to methods for synthesis) cubic boron nitride (CBN) in the form of crystals at high pressure and temperature in the region of thermodynamic stability of the CNS, and can be preferably used in the tool industry

  • Method for producing high density hexagonal boron nitride

    A method for producing a high density boron nitride sintered body includes mixing high purity hexagonal boron nitride powder with 0.1 to 20% by weight of at least one alkaline earth metal, then shaping the resultant mixture and firing the resultant shaped body in a non-oxidizing atmosphere containing nitrogen.

  • US Patent for Porous cubic boron nitride based material

    Apr 25, 2002· Porous cubic boron nitride based material suitable for subsequent production of cutting tools and method for its production Apr 25, 2002 Sandvik AB The presently claimed invention relates to a method of making a PcBN cutting tool insert.

  • Method of producing soluble hexagonal boron nitride

    Method of producing cubic boron nitride, having light emission // 2394757. FIELD: chemistry. The invention relates to methods for synthesis) cubic boron nitride (CBN) in the form of crystals at high pressure and temperature in the region of thermodynamic stability of the CNS, and can be preferably used in the tool industry

  • Method for producing cubic boron nitride and product

    A method for producing cubic boron nitride includes maintaining hexagonal boron nitride in the presence of a catalyst substance under conditions where cubic boron nitride remains thermodynamically stable to thereby transform hexagonal boron nitride into cubic boron nitride, wherein the catalyst substance contains LiMBN 2, in which M represents Ca, Sr, Ba, Ra, Be, or Mg,

  • Cubic Boron Nitride an overview | ScienceDirect Topics

    Thermal CVD methods below 1250°C, using B 2 H 6, BF 3, and B 3 N 3 H 6 to provide the boron and N 2 and NH 3 the nitrogen, solely produce the noncubic, sp 2-hybridized version of boron nitride that is amorphous or poorly crystallized. The hot-filament CVD so widely used to make diamond films does not appear to be successful for c-BN deposition.

  • US Patent for Porous cubic boron nitride based material

    Apr 25, 2002· Porous cubic boron nitride based material suitable for subsequent production of cutting tools and method for its production Apr 25, 2002 Sandvik AB The presently claimed invention relates to a method of making a PcBN cutting tool insert.

  • (PDF) A novel method for producing boron nitride

    A novel method for producing boron nitride nanosheets via synergistic exfoliation with pure shear ball milling and ultrasonication Article (PDF Available) in Ceramics International · August 2019

  • Method of preparing cubic polycrystals of boron nitride

    Three methods for preparing cubic polycrystals of boron nitride are outlined. In the first method, powder is subjected to pressures above 40 kilobars and temperatures above 12000 C. The treatment is applied to a powder consisting principally of boron nitride of a denser modification which was previously subjected to a shock wave resulting in defects in the crystalline structure that favor the

  • Method of making polycrystalline material based on cubic

    Known methods for producing polycrystalline materials based on cubic boron nitride with the inclusion of diamond powders. In US patents No. 3852078 and 3894850 polycrystalline material made from a mixture of powders of hexagonal boron nitride and diamond, with diamond powders take less than 10 μm, the powder of cubic boron nitride up to 3

  • Cubic Boron Nitride an overview | ScienceDirect Topics

    6.3 Cubic Boron Nitride-Reinforced Metal Matrix Composite Coatings. Cubic boron nitride (cBN), having similar crystal structure with diamond, is the second- hardest known material after diamond. It is synthesized from hBN under conditions similar to those used to produce

  • Applications and Synthesis Methods of Cubic Boron Nitride

    Cubic boron nitride (CBN) is a typical Ⅲ Ⅴ group compound and a kind of synthetic inorganic crystal materials. In 1957, R.H. Wentorf from U.S. General Electric Company, used hexagonal boron nitride as raw materials, and alkali metal or alkaline earth metal and nitrides as catalyst under the condition of static high pressure high temperature to synthesize the first CBN crystal in the world.

  • Production methods and application of polycrystalline

    Production methods and application of polycrystalline cubic boron nitride Article in Jingangshi yu Moliao Moju Gongcheng/Diamond and Abrasives Engineering 35(2):74-80 · April 2015 with 58 Reads

  • method for boron nitride ceramic production Exhibition

    Jan 13, 2017· According to the invention, a mixture of boron nitride powder by the method of dielectric graphite and reactive sintering except elemental boron powder agent for manufacturing boron nitride ceramic products, including the mixture for forming the shape of the product, compacted mixture under pressure will have been formed and the reaction

  • Method of production of boron nitride of graphite-like

    A known method of producing graphite-like boron nitride of hexagonal structure with a low index of the graphitization uglehimicheskij methods, for example, using soot [Samsonov, G.V., Kulik OP, Polishchuk B.C. Receipt and analysis methods nitrides. Kiev: Naukova Dumka, 1978, s 6-137].

  • Method of obtaining composite material based on diamond

    The technical result is achieved in that in a method of producing a composite material based on powders of diamond and/or cubic boron nitride, in which the powder is placed in a mold, compacted and impregnated with metals or their alloys, powders of diamond and/or cubic boron nitride take a different strength, mix the powders, and the mixture

  • Boron Nitride: Properties, Production and Applications

    Boron nitride (BN) is a heat and chemical resistant crystalline compound with refractory properties composed of boron and nitride. Because it exists in multiple polymorphs, BN has evolved as a highly useful compound, finding its purpose in a wide range of industries and applications. Here, you will learn about: The properties of boron nitride; The production process and forms of boron nitride

  • Method of making polycrystalline material based on cubic

    Known methods for producing polycrystalline materials based on cubic boron nitride with the inclusion of diamond powders. In US patents No. 3852078 and 3894850 polycrystalline material made from a mixture of powders of hexagonal boron nitride and diamond, with diamond powders take less than 10 μm, the powder of cubic boron nitride up to 3

  • Method of production of boron nitride of graphite-like

    A known method of producing graphite-like boron nitride of hexagonal structure with a low index of the graphitization uglehimicheskij methods, for example, using soot [Samsonov, G.V., Kulik OP, Polishchuk B.C. Receipt and analysis methods nitrides. Kiev: Naukova Dumka, 1978, s 6-137].

  • Method of preparing cubic polycrystals of boron nitride

    Three methods for preparing cubic polycrystals of boron nitride are outlined. In the first method, powder is subjected to pressures above 40 kilobars and temperatures above 12000 C. The treatment is applied to a powder consisting principally of boron nitride of a denser modification which was previously subjected to a shock wave resulting in defects in the crystalline structure that favor the

  • Do You Know Cubic Boron Nitride? Application Of Cubic

    Application Of Cubic Boron Nitride And New Preparation Method. admin 2019-06-05 2019-06-05 News. Cubic boron nitride (CBN) is currently the second hardest material other than diamond. In contrast, the technology previously used to produce c-BN required hexagonal nitrogen. The boron was heated to 3,500 Kelvin (5,840 degrees Fahrenheit) and

  • Detector Having A Thin Film Of Boron Nitride (BN) Such As

    Patent application title: Detector Having A Thin Film Of Boron Nitride (BN) Such As Cubic BN And Method, Systems And Array Utilizing Same Inventors: Roy Clarke Codrin N. Cionca Agents: BROOKS KUSHMAN P.C. Assignees: THE REGENTS OF THE UNIVERSITY OF MICHIGAN Origin: SOUTHFIELD, MI US IPC8 Class: AG01T308FI USPC Class: 25037005 Abstract: A detector having a thin film of boron nitride

  • Crystalline turbostratic boron nitride powder and method

    Preparation of cubic boron nitride using as a flux a fluoronitride: 5169613, Feb 06 1991: The Ohio State University Research Foundation: Method for the preparation of boron nitride using ammonia-monohaloborane: 5230873, Sep 10 1988: GOLZ, FIRMA SIEGFRIED: Process for producing amorphous boron nitride of high hardness: JP2296706, JP44966

  • Ultrahigh thermal conductivity in isotope-enriched cubic

    Jan 31, 2020· Chen et al. found that isotopically pure cubic boron nitride has an ultrahigh thermal conductivity, 75% that of diamond. Using only boron-11 or boron-10 allows the crystal vibrations that carry heat to move more efficiently through the material. This property could be exploited for better regulating the temperature of high-power devices.

  • How To Distinguish The Advantages And Disadvantages Of

    The quality and durability of cubic boron nitride tools will be better than other abrasive tools. 3. Strict inspection methods: In addition to dimensional accuracy and surface quality, in the production process of cubic boron nitride tools, the microscopic defects under the electron microscope is the most likely to produce

  • cubic boron nitride filmの意味・使い方・読み方 | Weblio英和辞書

    To establish a film-forming technique of forming a new cubic boron nitride film having improved hydrophilicity, and to provide the new cubic boron nitride film based on the film-forming technique and a method for producing the same. 例文帳に追加

  • 「cubic boron nitride」に関連した英語例文の一覧と使い方 Weblio

    This cubic boron nitride abrasive grain is obtained by maintaining a mixture comprising hexagonal boron nitride and seed crystal of cubic boron nitride under a pressure and temperature condition where the cubic boron nitride is thermodynamically stable, wherein twin crystal of the cubic boron nitride is included in the seed crystal of the cubic boron nitride. 例文帳に追加. 六方晶

  • Cubic Boron Nitride (CBN) Market Insights 2020, Analysis

    2020 Global and Chinese Cubic Boron Nitride (CBN) Market Size, Share & Trends Analysis is a professional and in-depth study on the current state of the global Cubic Boron Nitride (CBN) market with a focus on the Chinese market.

  • Amazon : NEW Patent CD for Cubic boron nitride

    A variety of methods for producing cubic boron nitride have been developed, and the method which is best known and most often employed in industry includes maintaining hexagonal boron nitride under high-temperature, high-pressure conditions (approximately 5.5 GPa and 1600gree.

  • Cubic Boron Nitride – WorldWide Superabrasives, LLC

    Cubic Boron Nitride Second in hardness only to diamond. cBN exhibits a high abrasion resistance and thermal conductivity when compared to conventional abrasives such as

  • [PDF]
  • Method for Simulating the Thickness Distribution of a

    Method for simulating the thickness distribution of a cubic boron nitride film deposited on a curved substrate using ion-beam-assisted vapor deposition T. Kobayashia*, R. Valizadehb, J. S. Colligonb, H. Kanematsuc, K. Morisatoa aDepartment of Electronics & Control Engineering, Tsuyama National College of Technology, Okayama, 708-8509 Japan