Title: Crystalline boron nitride aerogels

Abstract

This disclosure provides methods and materials related to boron nitride aerogels. For example, one aspect relates to a method for making an aerogel comprising boron nitride, comprising: (a) providing boron oxide and an aerogel comprising carbon; (b) heating the boron oxide to melt the boron oxide and heating the aerogel; (c) mixing a nitrogen-containing gas with boron oxide vapor from molten boron oxide; and (d) converting at least a portion of the carbon to boron nitride to obtain the aerogel comprising boron nitride. Another aspect relates to a method for making an aerogel comprising boron nitride, comprising heating boron oxide and an aerogel comprising carbon under flow of a nitrogen-containing gas, wherein boron oxide vapor and the nitrogen-containing gas convert at least a portion of the carbon to boron nitride to obtain the aerogel comprising boron nitride.

Inventors:

Zettl, Alexander K.; Rousseas, Michael; Goldstein, Anna P.; Mickelson, William; Worsley, Marcus A.; Woo, Leta

Issue Date:

Tue Dec 12 00:00:00 EST 2017

Research Org.:

Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1413254

Patent Number(s):

9840414

Application Number:

15/408,297

Assignee:

Lawrence Livermore National Security, LLC (Livermore, CA); The Regents of the University of California (Oakland, CA)

Patent Classifications (CPCs):

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

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C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01B - NON-METALLIC ELEMENTS

C01B21/064 - with boron
C01B21/0645 - {Preparation by carboreductive nitridation}

C - CHEMISTRY C01 - INORGANIC CHEMISTRY C01P - INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS

C01P2002/04 - Compounds with a limited amount of crystallinty, e.g. as indicated by a crystallinity index
C01P2002/76 - by a space-group or by other symmetry indications
C01P2002/78 - by stacking-plane distances or stacking sequences
C01P2002/82 - by IR- or Raman-data
C01P2004/02 - obtained by optical microscopy
C01P2004/03 - obtained by SEM
C01P2004/04 - obtained by TEM, STEM, STM or AFM
C01P2004/61 - Micrometer sized, i.e. from 1-100 micrometer
C01P2006/10 - Solid density
C01P2006/12 - Surface area
C01P2006/16 - Pore diameter
C01P2006/60 - Optical properties, e.g. expressed in CIELAB-values

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

C04B2235/3409 - Boron oxide, borates, boric acids, or oxide forming salts thereof, e.g. borax
C04B2235/46 - Gases other than oxygen used as reactant, e.g. nitrogen used to make a nitride phase
C04B2235/656 - characterised by specific heating conditions during heat treatment
C04B2235/761 - Unit-cell parameters, e.g. lattice constants
C04B2235/80 - Phases present in the sintered or melt-cast ceramic products other than the main phase
C04B35/5831 - based on cubic boron nitrides {or Wurtzitic boron nitrides, including crystal structure transformation of powder}

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DOE Contract Number:  

AC02-05CH11231; AC52-07NA27344

Resource Type:

Patent

Resource Relation:

Patent File Date: 2017 Jan 17

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY