Lowering the sintering temperature of Gd-doped ceria by mechanochemical activation

Jung, Woong; Park, Hee Sun; Kang, Young Jin; Yoon, Dang-Hyok

doi:10.1016/j.ceramint.2009.07.020

Cited by 22 publications

(7 citation statements)

References 15 publications

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“…In our case, the transformation of α-to β-Si 3 N 4 was completed at <1600 °C. The lower α-to β-Si 3 N 4 transformation temperature than the previous report might be attributed to the high-energy milling process as also reported in the case of lowering sintering temperature of Gd doped-Ceria [20].…”

Section: Methodscontrasting

confidence: 41%

Effect of Milling on the Densification of SiC-BasedComposites from Polysilazane

Noviyanto

Nishimura

2016

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Section: Methodscontrasting

confidence: 41%

Effect of Milling on the Densification of SiC-BasedComposites from Polysilazane

Noviyanto

Nishimura

2016

MST

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“…Preparation procedures for Gd‐doped ceria ceramics, particularly those containing 10‐20 mol% Gd (10GDC‐20GDC) have been the subject of a number of reports in the literature . The effect of atmosphere (oxygen partial pressure) and the influence of sintering aids, eg, FeO 1.5 , Li 2 O CoO, CuO, NiO to enhance densification, have been described.…”

Section: Introductionmentioning

confidence: 99%

Rapid sintering protocol produces dense ceria‐based ceramics

et al. 2018

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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.

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“…Dense ceria based electrolytes are fabricated via solid-state reaction by heat-treating a mixture of the individual component oxide powders at ∼1300 • C to yield a single phase solid solution and then refiring the solid solution powder at even higher temperatures of ∼1700-1800 • C [6,7]. earth substituted ceria at lower preparation temperatures include hydrothermal and solvothermal synthesis [8][9][10][11], sol-gel synthesis [12], spray pyrolysis [13] etc. When a Ce 4+ cationic sub-lattice gets substituted with a trivalent RE ion, oxygen vacancies are created in anionic sub-lattice in order to compensate the effective negative charge produced by the substituent cations [1,14].…”

Section: Introductionmentioning

confidence: 99%