Direct in situ observation of electric field assisted densification of ZnO by energy dispersive X-ray diffraction

Bicer, Hulya; Beyoglu, Berra; Ozdemir, T.  Ertugrul; Okasinski, John; Tsakalakos, Thomas

doi:10.1016/j.ceramint.2019.01.057

Title: Direct in situ observation of electric field assisted densification of ZnO by energy dispersive X-ray diffraction

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Abstract

Electric field assisted sintering techniques are used to enhance the densification process, reducing sintering time and temperature. Here, we report the in situ characterization of non-isothermal densification behavior of zinc oxide under simultaneous application of thermal and electric field by energy dispersive X-ray diffraction. 99% density was achieved under the electric field of 50 V/mm in the 588–843 °C range in a short time without grain growth. The in-situ energy dispersive X-ray diffraction study revealed the abnormal volumetric unit cell expansion of 0.9% at 843 °C associated with the observed sudden rise of the power absorption by the specimen during densification. Furthermore, the variation in peak broadening as a function of time exhibited singularity in the 588–843 °C range implying the formation and rearrangement of defects correlated with densification during electric field assisted sintering.

Authors:

Bicer, Hulya ^[1]; Beyoglu, Berra ^[2]; Ozdemir, T. Ertugrul ^[2]; Okasinski, John ^[3]; Tsakalakos, Thomas ^[2]

Kutahya Dumlupinar Univ., Kutahya (Turkey)
Rutgers Univ., New Brunswick, NJ (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)

Publication Date:: Wed Jan 09 00:00:00 EST 2019

Research Org.:: Argonne National Lab. (ANL), Argonne, IL (United States)

Sponsoring Org.:: Argonne National Laboratory, Advanced Photon Source; USDOE

OSTI Identifier:: 1525985

Alternate Identifier(s):: OSTI ID: 1547887

Grant/Contract Number:: AC02-06CH11357

Resource Type:: Accepted Manuscript

Journal Name:: Ceramics International

Additional Journal Information:: Journal Volume: 45; Journal Issue: 6; Journal ID: ISSN 0272-8842

Publisher:: Elsevier

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; Flash; Sintering; ZnO; in situ diffraction

Citation Formats


                    Bicer, Hulya, Beyoglu, Berra, Ozdemir, T.  Ertugrul, Okasinski, John, and Tsakalakos, Thomas. Direct in situ observation of electric field assisted densification of ZnO by energy dispersive X-ray diffraction.  United States: N. p., 2019. 
Web.  doi:10.1016/j.ceramint.2019.01.057.

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                    Bicer, Hulya, Beyoglu, Berra, Ozdemir, T.  Ertugrul, Okasinski, John, & Tsakalakos, Thomas. Direct in situ observation of electric field assisted densification of ZnO by energy dispersive X-ray diffraction.  United States.  https://doi.org/10.1016/j.ceramint.2019.01.057

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                    Bicer, Hulya, Beyoglu, Berra, Ozdemir, T.  Ertugrul, Okasinski, John, and Tsakalakos, Thomas. Wed .  
"Direct in situ observation of electric field assisted densification of ZnO by energy dispersive X-ray diffraction".  United States.  https://doi.org/10.1016/j.ceramint.2019.01.057.  https://www.osti.gov/servlets/purl/1525985.

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@article{osti_1525985,

  title        = {Direct in situ observation of electric field assisted densification of ZnO by energy dispersive X-ray diffraction},

  author       = {Bicer, Hulya and Beyoglu, Berra and Ozdemir, T.  Ertugrul and Okasinski, John and Tsakalakos, Thomas},

  abstractNote = {Electric field assisted sintering techniques are used to enhance the densification process, reducing sintering time and temperature. Here, we report the in situ characterization of non-isothermal densification behavior of zinc oxide under simultaneous application of thermal and electric field by energy dispersive X-ray diffraction. 99% density was achieved under the electric field of 50 V/mm in the 588–843 °C range in a short time without grain growth. The in-situ energy dispersive X-ray diffraction study revealed the abnormal volumetric unit cell expansion of 0.9% at 843 °C associated with the observed sudden rise of the power absorption by the specimen during densification. Furthermore, the variation in peak broadening as a function of time exhibited singularity in the 588–843 °C range implying the formation and rearrangement of defects correlated with densification during electric field assisted sintering.},

  doi          = {10.1016/j.ceramint.2019.01.057},

  journal      = {Ceramics International},

  number       = 6,

  volume       = 45,

  place        = {United States},

  year         = {Wed Jan 09 00:00:00 EST 2019},

  month        = {Wed Jan 09 00:00:00 EST 2019}

}

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