Rapid sintering protocol produces dense ceria-based ceramics

Nimrod Yavo, Asaf Nissenbaum, Ellen Wachtel, Tal El Shaul, Orit Mendelson, Giora Kimmel, Sangtae Kim, Igor Lubomirsky, Ori Yeheskel

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We report on a rapid sintering protocol, which optimizes the preparation of 0-29 mol% Gd-doped ceria ceramics with density ≥98% of the theoretical crystal lattice value. The starting material is a nanometer grain-sized powder prepared by carbonate co-precipitation and calcined with minimal agglomeration and loss of surface area. Slow (5°C/min) heating of the green-body from 500°C to the optimum temperature of rapid sintering (T1opt, dwell time <1 minute) followed by 20°C/min cooling to 1150°C with 6 minutes dwell time, produces maximum pellet density. T1opt increases from 1300 to ~1500°C with increase in Gd-content, while the average grain size in the maximally dense pellets, as determined by scanning electron microscopy, ranges between 600 nm and ~1 μm. For each doping level, the logarithm of the average grain size decreases linearly with 1/T1. By avoiding extended exposure to sintering temperatures, this protocol is expected to minimize undesirable Gd segregation.

Original languageEnglish
JournalJournal of the American Ceramic Society
DOIs
Publication statusAccepted/In press - Jan 1 2018

Fingerprint

Cerium compounds
ceramics
Sintering
grain size
Carbonates
Coprecipitation
agglomeration
Crystal lattices
Powders
Agglomeration
surface area
temperature
scanning electron microscopy
Doping (additives)
crystal
Cooling
heating
cooling
Heating
carbonate

Keywords

  • Ceramics
  • Ceria
  • Nanometric powder
  • Pores
  • Sintering

ASJC Scopus subject areas

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry

Cite this

Yavo, N., Nissenbaum, A., Wachtel, E., Shaul, T. E., Mendelson, O., Kimmel, G., ... Yeheskel, O. (Accepted/In press). Rapid sintering protocol produces dense ceria-based ceramics. Journal of the American Ceramic Society. https://doi.org/10.1111/jace.15743

Rapid sintering protocol produces dense ceria-based ceramics. / Yavo, Nimrod; Nissenbaum, Asaf; Wachtel, Ellen; Shaul, Tal El; Mendelson, Orit; Kimmel, Giora; Kim, Sangtae; Lubomirsky, Igor; Yeheskel, Ori.

In: Journal of the American Ceramic Society, 01.01.2018.

Research output: Contribution to journalArticle

Yavo, N, Nissenbaum, A, Wachtel, E, Shaul, TE, Mendelson, O, Kimmel, G, Kim, S, Lubomirsky, I & Yeheskel, O 2018, 'Rapid sintering protocol produces dense ceria-based ceramics', Journal of the American Ceramic Society. https://doi.org/10.1111/jace.15743
Yavo, Nimrod ; Nissenbaum, Asaf ; Wachtel, Ellen ; Shaul, Tal El ; Mendelson, Orit ; Kimmel, Giora ; Kim, Sangtae ; Lubomirsky, Igor ; Yeheskel, Ori. / Rapid sintering protocol produces dense ceria-based ceramics. In: Journal of the American Ceramic Society. 2018.
@article{fc6b3583e1424d5483f3b78dc97a7185,
title = "Rapid sintering protocol produces dense ceria-based ceramics",
abstract = "We report on a rapid sintering protocol, which optimizes the preparation of 0-29 mol{\%} Gd-doped ceria ceramics with density ≥98{\%} of the theoretical crystal lattice value. The starting material is a nanometer grain-sized powder prepared by carbonate co-precipitation and calcined with minimal agglomeration and loss of surface area. Slow (5°C/min) heating of the green-body from 500°C to the optimum temperature of rapid sintering (T1opt, dwell time <1 minute) followed by 20°C/min cooling to 1150°C with 6 minutes dwell time, produces maximum pellet density. T1opt increases from 1300 to ~1500°C with increase in Gd-content, while the average grain size in the maximally dense pellets, as determined by scanning electron microscopy, ranges between 600 nm and ~1 μm. For each doping level, the logarithm of the average grain size decreases linearly with 1/T1. By avoiding extended exposure to sintering temperatures, this protocol is expected to minimize undesirable Gd segregation.",
keywords = "Ceramics, Ceria, Nanometric powder, Pores, Sintering",
author = "Nimrod Yavo and Asaf Nissenbaum and Ellen Wachtel and Shaul, {Tal El} and Orit Mendelson and Giora Kimmel and Sangtae Kim and Igor Lubomirsky and Ori Yeheskel",
year = "2018",
month = "1",
day = "1",
doi = "10.1111/jace.15743",
language = "English",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
publisher = "Wiley-Blackwell",

}

TY - JOUR

T1 - Rapid sintering protocol produces dense ceria-based ceramics

AU - Yavo, Nimrod

AU - Nissenbaum, Asaf

AU - Wachtel, Ellen

AU - Shaul, Tal El

AU - Mendelson, Orit

AU - Kimmel, Giora

AU - Kim, Sangtae

AU - Lubomirsky, Igor

AU - Yeheskel, Ori

PY - 2018/1/1

Y1 - 2018/1/1

N2 - We report on a rapid sintering protocol, which optimizes the preparation of 0-29 mol% Gd-doped ceria ceramics with density ≥98% of the theoretical crystal lattice value. The starting material is a nanometer grain-sized powder prepared by carbonate co-precipitation and calcined with minimal agglomeration and loss of surface area. Slow (5°C/min) heating of the green-body from 500°C to the optimum temperature of rapid sintering (T1opt, dwell time <1 minute) followed by 20°C/min cooling to 1150°C with 6 minutes dwell time, produces maximum pellet density. T1opt increases from 1300 to ~1500°C with increase in Gd-content, while the average grain size in the maximally dense pellets, as determined by scanning electron microscopy, ranges between 600 nm and ~1 μm. For each doping level, the logarithm of the average grain size decreases linearly with 1/T1. By avoiding extended exposure to sintering temperatures, this protocol is expected to minimize undesirable Gd segregation.

AB - We report on a rapid sintering protocol, which optimizes the preparation of 0-29 mol% Gd-doped ceria ceramics with density ≥98% of the theoretical crystal lattice value. The starting material is a nanometer grain-sized powder prepared by carbonate co-precipitation and calcined with minimal agglomeration and loss of surface area. Slow (5°C/min) heating of the green-body from 500°C to the optimum temperature of rapid sintering (T1opt, dwell time <1 minute) followed by 20°C/min cooling to 1150°C with 6 minutes dwell time, produces maximum pellet density. T1opt increases from 1300 to ~1500°C with increase in Gd-content, while the average grain size in the maximally dense pellets, as determined by scanning electron microscopy, ranges between 600 nm and ~1 μm. For each doping level, the logarithm of the average grain size decreases linearly with 1/T1. By avoiding extended exposure to sintering temperatures, this protocol is expected to minimize undesirable Gd segregation.

KW - Ceramics

KW - Ceria

KW - Nanometric powder

KW - Pores

KW - Sintering

UR - http://www.scopus.com/inward/record.url?scp=85047659748&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85047659748&partnerID=8YFLogxK

U2 - 10.1111/jace.15743

DO - 10.1111/jace.15743

M3 - Article

AN - SCOPUS:85047659748

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

SN - 0002-7820

ER -