Title: Methods of flash sintering

Abstract

This disclosure provides methods of flash sintering and compositions created by these methods. Methods for sintering multilayered bodies are provided in which a sintered body is produced in less than one minute. In one aspect, each layer is of a different composition, and may be constituted wholly from a ceramic or from a combination of ceramic and metallic particles. When the body includes a layer of an anode composition, a layer of an electrolyte composition and a layer of a cathode composition, the sintered body can be used to produce a solid oxide fuel cell.

Inventors:

Raj, Rishi; Cologna, Marco; Francis, John S.

Issue Date:

Tue May 10 00:00:00 EDT 2016

Research Org.:

The Regents of the University of Colorado, Denver, CO (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1252455

Patent Number(s):

9334194

Application Number:

14/319,631

Assignee:

The Regents of the University of Colorado, Denver, CO (United States)

Patent Classifications (CPCs):

B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

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B - PERFORMING OPERATIONS B82 - NANOTECHNOLOGY B82Y - SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES

B82Y30/00 - Nanotechnology for materials or surface science, e.g. nanocomposites

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

C04B2235/3206 - Magnesium oxides or oxide-forming salts thereof
C04B2235/3225 - Yttrium oxide or oxide-forming salts thereof
C04B2235/3275 - Cobalt oxides, cobaltates or cobaltites or oxide forming salts thereof, e.g. bismuth cobaltate, zinc cobaltite
C04B2235/5409 - expressed by specific surface values
C04B2235/5445 - submicron sized, i.e. from 0,1 to 1 micron
C04B2235/5454 - nanometer sized, i.e. below 100 nm
C04B2235/5463 - Particle size distributions
C04B2235/608 - Green bodies or pre-forms with well-defined density
C04B2235/6562 - Heating rate
C04B2235/6567 - Treatment time
C04B2235/666 - Applying a current during sintering, e.g. plasma sintering [SPS], electrical resistance heating or pulse electric current sintering [PECS]
C04B2235/667 - Sintering using wave energy, e.g. microwave sintering
C04B2235/77 - Density
C04B2235/781 - Nanograined materials, i.e. having grain sizes below 100 nm
C04B2235/782 - Grain size distributions
C04B2235/783 - Bimodal, multi-modal or multi-fractional
C04B2235/784 - Monomodal
C04B2235/785 - Submicron sized grains, i.e. from 0,1 to 1 micron
C04B2235/786 - Micrometer sized grains, i.e. from 1 to 100 micron
C04B2235/94 - Products characterised by their shape
C04B2235/95 - Products characterised by their size, e.g. microceramics
C04B2235/9615 - Linear firing shrinkage
C04B2237/04 - Ceramic interlayers
C04B2237/06 - Oxidic interlayers
C04B2237/348 - Zirconia, hafnia, zirconates or hafnates
C04B2237/597 - whereby the interlayer is continuous but porous, e.g. containing hollow or porous particles, macro- or micropores or cracks
C04B35/016 - {based on manganites}
C04B35/111 - Fine ceramics
C04B35/117 - Composites
C04B35/119 - with zirconium oxide
C04B35/47 - based on strontium titanates
C04B35/486 - Fine ceramics
C04B35/488 - Composites
C04B35/4885 - {with aluminium oxide}
C04B35/63416 - {Polyvinylalcohols [PVA]
C04B35/64 - Burning or sintering processes
C04B35/645 - Pressure sintering
C04B38/0067 - {characterised by the density of the end product}
C04B38/0074 - {expressed as porosity percentage}

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DOE Contract Number:  

FG02-07ER46403

Resource Type:

Patent

Resource Relation:

Patent File Date: 2014 Jun 30

Country of Publication:

United States

Language:

English

Subject:

36 MATERIALS SCIENCE; 30 DIRECT ENERGY CONVERSION