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Title: Process for making boron nitride using sodium cyanide and boron

Abstract

This a very simple process for making boron nitride by mixing sodium cyanide and boron phosphate and heating the mixture in an inert atmosphere until a reaction takes place. The product is a white powder of boron nitride that can be used in applications that require compounds that are stable at high temperatures and that exhibit high electrical resistance.

Inventors:
 [1]
  1. (Oak Ridge, TN)
Publication Date:
Research Org.:
Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA
OSTI Identifier:
875245
Patent Number(s):
US H736
Assignee:
United Stated of America as represented by Department of Energy (Washington, DC) SNL
DOE Contract Number:
AC04-76
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
process; boron; nitride; sodium; cyanide; simple; mixing; phosphate; heating; mixture; inert; atmosphere; reaction; takes; product; white; powder; applications; require; compounds; stable; temperatures; exhibit; electrical; resistance; reaction takes; boron nitride; electrical resistance; inert atmosphere; sodium cyanide; mixing sodium; boron phosphate; /423/

Citation Formats

Bamberger, Carlos E. Process for making boron nitride using sodium cyanide and boron. United States: N. p., 1990. Web.
Bamberger, Carlos E. Process for making boron nitride using sodium cyanide and boron. United States.
Bamberger, Carlos E. 1990. "Process for making boron nitride using sodium cyanide and boron". United States. doi:. https://www.osti.gov/servlets/purl/875245.
@article{osti_875245,
title = {Process for making boron nitride using sodium cyanide and boron},
author = {Bamberger, Carlos E.},
abstractNote = {This a very simple process for making boron nitride by mixing sodium cyanide and boron phosphate and heating the mixture in an inert atmosphere until a reaction takes place. The product is a white powder of boron nitride that can be used in applications that require compounds that are stable at high temperatures and that exhibit high electrical resistance.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1990,
month = 1
}

Patent:

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  • This a very simple process for making boron nitride by mixing sodium cyanide and boron phosphate and heating the mixture in an inert atmosphere until a reaction takes place. The product is a white powder of boron nitride that can be used in applications that require compounds that are stable at high temperatures and that exhibit high electrical resistance.
  • This is a very simple process for making boron nitride by mixing sodium cyanide and boron phosphate and heating the mixture in an inert atmosphere until a reaction takes place. The product is a white powder of boron nitride that can be used in applications that require compounds that are stable at high temperatures and that exhibit high electrical resistance.
  • This patent describes a process for the preparation of polycrystalline cubic boron nitride from hexagonal boron nitride. It comprises: removing the oxide from the surface of the hexagonal boron nitride particles to form hexagonal boron nitride particles having a substantially oxide-free surface; coating the hexagonal boron, nitride particles having an oxide-free surface with an agent capable of preventing re-oxidation of the surface of the hexagonal boron nitride particles to form coated hexagonal boron nitride particles in an oxide-free state; converting the coated hexagonal boron nitride particles in an oxide-free state to a polycrystalline cubic boron nitride mass by direct conversionmore » of hexagonal boron nitride to cubic boron nitride.« less
  • A method is described for making re-sintered polycrystalline cubic boron nitride (CBN) which comprises: (a) placing sintered substantially catalyst-free boron-rich polycrystalline cubic boron nitride particles in a high pressure/high temperature apparatus, the particles being substantially free of sintering inhibiting impurities; (b) subjecting the boron-rich cubic boron nitride particles to a pressure and a temperature adequate to re-sinter the particles, the temperature being below the CBN reconversion temperature; (c) maintaining the temperature and pressure for a time sufficient to re-sinter the boron-rich cubic boron nitride particles in the apparatus, and (d) recovering the re-sintered polycrystalline cubic boron nitride from the apparatus.
  • A method of making a permanent magnet is disclosed wherein (1) a melt is formed having a base alloy composition comprising RE, Fe and/or Co, and B (where RE is one or more rare earth elements) and (2) TR (where TR is a transition metal selected from at least one of Ti, Zr, Hf, V, Nb, Ta, Cr, Mo, W, and Al) and at least one of C and N are provided in the base alloy composition melt in substantially stoichiometric amounts to form a thermodynamically stable compound (e.g. TR carbide, nitride or carbonitride). The melt is rapidly solidified inmore » a manner to form particulates having a substantially amorphous (metallic glass) structure and a dispersion of primary TRC, TRN and/or TRC/N precipitates. The amorphous particulates are heated above the crystallization temperature of the base alloy composition to nucleate and grow a hard magnetic phase to an optimum grain size and to form secondary TRC, TRN and/or TRC/N precipitates dispersed at grain boundaries. The crystallized particulates are consolidated at an elevated temperature to form a shape. During elevated temperature consolidation, the primary and secondary precipitates act to pin the grain boundaries and minimize deleterious grain growth that is harmful to magnetic properties. 33 figs.« less