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Title: Investigation of temperature approximation methods during flash sintering of ZnO

Journal Article · · Ceramics International
 [1];  [1];  [1];  [1];  [2];  [1]
  1. Rutgers Univ., New Brunswick, NJ (United States)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)

The lattice expansion in ZnO, using in-situ X ray diffraction, has been investigated during flash sintering with varying current densities. While current flow through the specimen enhances the kinetics of sintering for ZnO, the temperature is not high enough to claim thermal runaway or localized melting. Unlike the case of yttria stabilized zirconia [1,2], experimental temperature approximations predict comparable specimen temperature to conventional sintering temperature of ZnO. Microstructural analysis supports the findings of the in-situ temperature approximations. In comparison with black body radiation, a gap between theoretical value and measured value was found due to flaws in the theoretical model. In addition, a new type of flash sintering was introduced, with current ramp, to avoid the power spike which has been the source of much debate about the transition from voltage to current control. In conclusion, the advantage of this method is in the controlled sintering kinetics thus avoiding the channeling found in dielectric materials [3].

Research Organization:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Organization:
US Department of the Navy, Office of Naval Research (ONR); USDOE
Grant/Contract Number:
AC02-06CH11357
OSTI ID:
1466312
Alternate ID(s):
OSTI ID: 1691773
Journal Information:
Ceramics International, Vol. 44, Issue 6; ISSN 0272-8842
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 47 works
Citation information provided by
Web of Science

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Cited By (6)

Study of deformation mechanisms in flash-sintered yttria-stabilized zirconia by in-situ micromechanical testing at elevated temperatures journal February 2019
The effects of external fields in ceramic sintering journal September 2018
Reactive flash sintering: MgO and α‐Al 2 O 3 transform and sinter into single‐phase polycrystals of MgAl 2 O 4 journal October 2018
Recent Advances in Mechanism Research and Methods for Electric-Field-Assisted Sintering of Ceramics journal July 2018
Microstructural evolution of 3YSZ flash‐sintered with current ramp control journal February 2020
Processing and properties of Bi 0.98 R 0.02 FeO 3 (R = La, Sm, Y) ceramics flash sintered at ~650°C in <5 s journal August 2019

Figures / Tables (10)


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