Effect of ceria content on the sintering of ZrO2 based ceramics synthesized from a polymeric precursor

Quinelato, A. L.; Longo, Elson; Perazolli, L.; Varela, José Arana

doi:10.1016/s0955-2219(99)00269-1

Cited by 37 publications

(26 citation statements)

References 19 publications

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“…U and Ce should neither influence solid solution formation nor the course of sintering [44]. On the opposite, other impurities such as Si and Na could modify the densification process and the obtained final microstructures and densities [45,46].…”

Section: Precursor Powder Characteristicsmentioning

confidence: 96%

Application of the UMACS process to highly dense U1−xAmxO2±δ MABB fuel fabrication for the DIAMINO irradiation

Delahaye

Lebreton

Horlait

et al. 2013

Journal of Nuclear Materials

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Section: Precursor Powder Characteristicsmentioning

confidence: 96%

Application of the UMACS process to highly dense U1−xAmxO2±δ MABB fuel fabrication for the DIAMINO irradiation

Delahaye

Lebreton

Horlait

et al. 2013

Journal of Nuclear Materials

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“…It resulted from destruction of the polymeric network mainly due to the excess ethylene glycol break up [25]. In the second step, two exothermic peaks are found at 370 and 420 • C in the DSC curve with a weight loss of 11 % which are attributed to the combustion of citric acid and ethylene glycol derivatives [26]. Finally, in the third step, one exothermic peak observed at 520 • C in the DSC curve which is due to crystallization of cobalt ferrite.…”

Section: Resultsmentioning

confidence: 98%

Characterization of Mesoporous Cobalt Ferrite Foam Fabricated from Sol-Gel-Derived Nanoparticles

Emamian

Honarbakhsh-Raouf

Ataie

et al. 2015

J Supercond Nov Magn

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Porous magnetic ceramics have promising applications in filtering, sensor, catalyst, etc. This work concerns to the fabrication of mesoporous magnetic foam using synthesized nanopowders Singlephase cobalt ferrite nanopowders with a mean particle size of 60 nm were synthesized by modified Pechinitype sol-gel method, without pH adjustment, by calcination at 750 • C for 1 h. Precursor and derived cobalt ferrite nanopowders were characterized by thermogravimetry and differential scanning calorimetry, Xray diffraction pattern, scanning and transmission electron microscopes and vibration sample magnetometer analyses, proportionately. Furthermore, stereomicroscope and nitrogen gas adsorption-desorption analysis were employed for evaluating the resultant monolithic products Pure carbamide and nanopowders were subjected to successfully fabrication of cobalt ferrite foam using the space holder agent method. Total porosity of the produced foam was estimated about 58 %. The results demonstrated that obtained cobalt ferrite foam has a mesoporous structure and its surface area was calculated as 1.342 m 2 /g. Morphological analyses showed that the cell walls of the foam consist of sintered particles without abnormal grain growth microstructure. Also, the average particle sizes of cell walls were about 25 nm. The magnetic properties of fabricated foam favorably were A. Honarbakhsh-raouf close to the theoretical values of bulk cobalt ferrite, so that the coercivity and saturation magnetization of foam were gained 0.89 kOe and 75.8 emu/g, respectively.

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“…Due to its simplicity and ease of controlling, this polymeric metal complex method has been extensively used to synthesize ferroelectric [10,11], superconducting [12], fuel cell [13], electrode [14,15], catalytic and other types of materials [16][17][18]. Concerning the applications of this method in heterogeneous catalysis, most reports focus on the preparation of bulk oxides or the formation of catalytic films [19][20][21][22][23][24]. However, this method has obvious disadvantages such as violent reactions during the calcination, extensive use of organics (CA and EG), difficulties for controlling the particle size, etc.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Supported Catalysts by Impregnation and Calcination of Low-Temperature Polymerizable Metal-Complexes

Zhao

Boullosa-Eiras

et al. 2011

Top Catal

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The low-temperature polymerizable metal complex solution has been used as an active component precursor to prepare supported (structured) catalysts by a straight-forward sequence of impregnation, drying and calcination. Two typical samples, 5 wt% Zr x Ce 1-x O 2 / Al 2 O 3 nanocomposite and structured carbon nanofiber supported Cu-CeO 2 catalyst, are prepared to explore the potential of this method in the controlled synthesis of catalysts and catalyst supports. The interaction between the active component precursor and the surface of the solid matrices during impregnation and drying is investigated by infrared spectroscopy (IR) and transmission electron microscopy (TEM), demonstrating that the in situ polymerization process is crucial for the deposition of the active component on the surface of solid matrices. The evolution of the phase transformation and the structure of the produced materials during the calcination step is studied by coupling thermal gravimetric analysis-differential thermal analysis-mass spectroscopy (TGA-DTA-MS), TEM and X-ray diffraction (XRD) measurements, indicating that higher thermal stable particles or smaller particles can be obtained with the presence of the Al 2 O 3 or structured carbon nanofibers (SCNF), respectively, after calcination. This method combines the advantages of sol-gel and impregnation, representing a promising route for preparing supported catalysts and catalyst supports. The limitations of the method are also discussed.

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Effect of ceria content on the sintering of ZrO2 based ceramics synthesized from a polymeric precursor

Cited by 37 publications

References 19 publications

Application of the UMACS process to highly dense U1−xAmxO2±δ MABB fuel fabrication for the DIAMINO irradiation

Application of the UMACS process to highly dense U1−xAmxO2±δ MABB fuel fabrication for the DIAMINO irradiation

Characterization of Mesoporous Cobalt Ferrite Foam Fabricated from Sol-Gel-Derived Nanoparticles

Synthesis of Supported Catalysts by Impregnation and Calcination of Low-Temperature Polymerizable Metal-Complexes

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