Influence of ZrO2 on the thermo-mechanical response of nano-ZTA

Sarkar, Debasish; Adak, S.; Chu, Mingfu; Cho, S.J.; Mitra, N. K.

doi:10.1016/j.ceramint.2005.09.012

Cited by 52 publications

(15 citation statements)

References 21 publications

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“…Thus, the attempts that have been undertaken to improve the stability of DRM nickel catalysts have focused on the use of different oxides as supports (e.g., Al 2 O 3 , SiO 2 , La 2 O 3 , CeO 2 , ZrO 2 ) (Pompeo et al, 2007;Bereketidou and Goula, 2012;Li et al, 2016) or the use of a variety of dopants that include transition metals (e.g., Fe, Co, Sn) (Ay and Uner, 2015;Theofanidis et al, 2015;Zhao et al, 2016), noble metals (e.g., Ag, Pt, Pd, Ir) Yentekakis et al, 2015;Yu et al, 2015), lanthanide metals (e.g., La, Ce, Pr) (Goula et al, 2016a;Vasiliades et al, 2016;Xiang et al, 2016) and alkaline earth metals (e.g., Sr, Ca, Ba) (Bellido et al, 2009;Sutthiumporn and Kawi, 2011). Although ZrO 2 is an oxide with a relatively low surface area, its notable thermal stability, strength and toughness, as well as, the fact that it is an acid-basic bi-functional oxide (as it contains both basic and acidic properties over its surface that have the capacity to work either independently or in cooperation), which has redox functions, makes it attractive for use in reforming reactions (Sarkar et al, 2007;Goula et al, 2017;Charisiou et al, in press). Shiju et al (2009) suggested that tungstated zirconia possesses mainly acid sites, but their number and strength is strongly depended on the preparation conditions chosen for the support and its calcination temperature.…”

Section: Introductionmentioning

confidence: 99%

The Effect of WO3 Modification of ZrO2 Support on the Ni-Catalyzed Dry Reforming of Biogas Reaction for Syngas Production

Charisiou

Siakavelas

Papageridis

et al. 2017

Front. Environ. Sci.

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The time-on-stream catalytic performance and stability of 8 wt. % Ni catalyst supported on two commercially available catalytic supports, ZrO 2 and 15 wt.% WO 3 -ZrO 2 , was investigated under the biogas dry reforming reaction for syngas production, at 750 • C and a biogas quality equal to CH 4 /CO 2 = 1.5, that represents a common concentration of real biogas. A number of analytical techniques such as N 2 adsorption/desorption (BET method), XRD, H 2 -TPR, NH 3 -and CO 2 -TPD, SEM, ICP, thermal analysis (TGA/DTG) and Raman spectroscopy were used in order to determine textural, structural and other physicochemical properties of the catalytic materials, and the type of carbon deposited on the catalytic surface of spent samples. These techniques were used in an attempt to understand better the effects of WO 3 -induced modifications on the catalyst morphology, physicochemical properties and catalytic performance. Although Ni dispersion and reducibility characteristics were found superior on the modified Ni/WZr sample than that on Ni/Zr, its dry reforming of methane (DRM) performance was inferior; a result attributed to the enhanced acidity and complete loss of the basicity recorded on this catalyst, an effect that competes and finally overshadows the benefits of the other superior properties. Raman studies revealed that the degree of graphitization decreases with the insertion of WO 3 in the crystalline structure of the ZrO 2 support, as the I D /I G peak intensity ratio is 1.03 for the Ni/Zr and 1.29 for the Ni/WZr catalyst.

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Section: Introductionmentioning

confidence: 99%

The Effect of WO3 Modification of ZrO2 Support on the Ni-Catalyzed Dry Reforming of Biogas Reaction for Syngas Production

Charisiou

Siakavelas

Papageridis

et al. 2017

Front. Environ. Sci.

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“…In Al 2 O 3 matrix, t-ZrO 2 grains undergo the t-ZrO 2 to m-ZrO 2 phase transformation [19] , Which follows an thermal and diffusionless behavior with a thermal hystersis and shear-type mechanism [20] , consequently, the speed of the phase transformation is faster more than that of the crack propagation. As a result, the phase transformation prohibites the crack propagation, the volume effect of the phase transformation relieves the thermal stress, those are responsible for enhancing the thermal shock resistance of the samples.…”

Section: 3mentioning

confidence: 99%

Effect of nano-ZrO2 on microstructure and thermal shock behaviour of Al2O3/SiC composite ceramics used in solar thermal power

Jiao

et al. 2011

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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The Al 2 O 3 -ZrO 2 (3Y)-SiC composite ceramics used in solar thermal power were prepared by micrometric Al 2 O 3 , nano-ZrO 2 and SiC powders under the condition of pressureless sintering. The bulk density and bending strength of samples with 10vol% nano-ZrO 2 sintered at 1480 ℃ were 3.222 g/cm 3 and 160.4 MPa, respectively. The bending strength of samples after 7 times thermal shock tests (quenching from 1000 ℃ to 25 ℃ in air medium) is 132.0 MPa, loss rate of bending strength is only 17%. The effect of nano-ZrO 2 content on the microstructure and performance of Al 2 O 3 -ZrO 2 (3Y)-SiC composite ceramic was investigated. The experimental results show that the bending strength of samples with above 10vol% nano-ZrO 2 content has decreased, because the volume expansion resulting from t-ZrO 2 to m-ZrO 2 phase transformation is excessive; Adding proper nano-ZrO 2 would be contributed to improve the thermal shock resistance of the composite ceramics. The Al 2 O 3 -ZrO 2 (3Y)-SiC composite ceramic has promising potential application in solar thermal power.

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“…ZTA has attracted interest and extensive research due to a combination of high fracture toughness and wear and corrosion resistance. It finds applications in cutting tools [9][10][11], implants and dentistry [12,13].…”

Section: Introductionmentioning

confidence: 99%

Incorporation of zirconia nanoparticles into coatings formed on aluminium by AC plasma electrolytic oxidation

et al. 2008

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Composite ceramic coatings were formed on aluminium by AC plasma electrolytic oxidation (PEO) using Na 6 P 6 O 18 or Na 2 SiO 3 Á 5H 2 O/KOH electrolytes with monoclinic zirconia nanoparticles in suspension. The coatings grown in Na 2 SiO 3 Á 5H 2 O/KOH electrolyte revealed c-Al 2 O 3 and amorphous phase; a-Al 2 O 3 and AlPO 4 were additionally produced with the Na 6 P 6 O 18 electrolyte. Higher temperature zirconia phases, possibly tetragonal and orthorhombic, in addition to the monoclinic phase, were indicative of elevated temperatures at sites of microdischarges. Further, local melting resulted in zirconium-rich dendrites in the coating formed in silicate electrolyte. Zirconium was mainly located in the relatively compact, outer layer of the coating, constituting *70-90% of the coating thickness. Nanoparticles appeared to be incorporated at the coating surface and following transport to the interface regions between the inner and outer layers along short-circuit paths through the outer coating.

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Influence of ZrO2 on the thermo-mechanical response of nano-ZTA

Cited by 52 publications

References 21 publications

The Effect of WO3 Modification of ZrO2 Support on the Ni-Catalyzed Dry Reforming of Biogas Reaction for Syngas Production

The Effect of WO3 Modification of ZrO2 Support on the Ni-Catalyzed Dry Reforming of Biogas Reaction for Syngas Production

Effect of nano-ZrO2 on microstructure and thermal shock behaviour of Al2O3/SiC composite ceramics used in solar thermal power

Incorporation of zirconia nanoparticles into coatings formed on aluminium by AC plasma electrolytic oxidation

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