Mechanical properties of pure and doped cerium oxide

Lipińska-Chwałek, Marta; Schulze‐Küppers, Falk; Malzbender, Jürgen

doi:10.1016/j.jeurceramsoc.2014.11.036

Cited by 23 publications

(13 citation statements)

References 34 publications

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“…The elastic modulus at room temperature and 600 C is reported by Sato et al [28,29]. Additional data at room temperature and different porosities are reported by Lipi nska-Chwałek et al [30] and Wang et al [31]. These previous results are compared to the results reported here in Sec.…”

Section: Introductionsupporting

confidence: 77%

“…For porous media manufactured using pressed and colloidal processing techniques and having random pore stacking, the b-values are typically between 3 (representative of cubic stacking of spherical pores) and 5 (representative of cubic stacking of spherical solids) [66][67][68]. Similarly, two materials, A and B, of different porosity can be compared as Figure 11 illustrates published elastic modulus data for less porous [27][28][29]31] and more porous [30] ceria, formed by pressing, superimposed on the new data for gelcast ceria. All values from the literature are adjusted to an equivalent 0.20 porosity by applying Eq.…”

Section: Discussionmentioning

confidence: 99%

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Mechanical Properties of Gelcast Cerium Dioxide From 23 to 1500 °C

Sedler

Chase

Davidson

2016

Journal of Engineering Materials and Technology

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This work reports the elastic modulus and four-point flexural strength of a gelcast ceramic, cerium dioxide (ceria), with a microporosity of nominally 20% and a grain size of 11 μm from 23 to 1500 °C. The data augment the sparse data published for ceria and extend previous results by 150 °C. The ceria tested is representative of that constituting the ligaments of a reticulated porous ceramic. The elastic modulus decreases from 90 GPa at 23 °C to 16 GPa at 1500 °C. The flexural strength is 78 MPa below 900 °C and then decreases rapidly to 5 MPa at 1500 °C. These trends are consistent with data reported for other ceramics. Comparing the measured elastic modulus to prior data obtained for lower porosity shows the minimum solid area (MSA) model can be used to extend the modulus data to other porosities. Similarly, the flexural strength data agree with prior data when the effects of specimen size, porosity, and grain size are taken into account.

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Section: Introductionsupporting

confidence: 77%

Section: Discussionmentioning

confidence: 99%

Mechanical Properties of Gelcast Cerium Dioxide From 23 to 1500 °C

Sedler

Chase

Davidson

2016

Journal of Engineering Materials and Technology

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“…However, this usually has an adverse effect on mechanical stability. The porosity that is tolerable for mechanical stability depends on the mechanical properties of the substrate material . Transport paths can be enlarged by increasing the pore opening diameters, making gas diffusion instead of Knudsen diffusion the dominant transport mechanism.…”

Section: Dense Membranesmentioning

confidence: 99%

Ceramic Membranes: Materials – Components – Potential Applications

et al. 2019

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Gas separation in dense ceramic membranes is driven by the partial pressure gradient across the membrane. The mixed conducting materials most commonly used are single‐phase perovskites or fluorites. In recent years, the development of dual‐phase systems combining a mixed ion‐conducting and electron‐conducting phase has increased. The advantage is that a larger number of very stable materials systems is available. The membrane designs currently used include planar, tubular, hollow‐fiber, and honeycomb membranes. Each of these designs has specific advantages and disadvantages, depending on the application. Innovative joining concepts are also often needed due to the high temperatures involved. These usually involve the use of glass‐ceramic sealants or reactive metal brazes. Applications focus either on the separation of gases alone, i.e., the supply of oxygen or hydrogen, or on membrane reactors. In membrane reactors, a chemical reaction occurs on one or both sides of the membrane in addition to gas separation. The supply of gases is of potential interest for power plants, for the cement, steel, and glass industries, for the medical sector, and for mobile applications. Membrane reactors can be used to produce base chemicals or synthetic fuels.

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“…Dies geht jedoch in der Regel zu Lasten der mechanischen Stabilität. Dabei ist der für die mechanische Stabilität tolerierbare Porenanteil abhängig von den mechanischen Eigenschaften des Trägermaterials . Transportwege können durch die Erhöhung der Porenöffnungsradien vergrößert werden, so dass Gasdiffusion und nicht Knudsen‐Diffusion den dominierenden Transportmechanismus darstellt.…”

Section: Dichte Membranenunclassified

Keramische Membranen: Materialien – Bauteile – potenzielle Anwendungen

Meulenberg

Schulze‐Küppers

Gestel

et al. 2019

Chemie Ingenieur Technik

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Keramische Membranen lassen sich in dichte und poröse Membranen unterteilen. Die Materialien, Mikrostruktur und Herstellungswege werden beschrieben und Einblicke in aktuelle Forschungsthemen gegeben. Durch Anpassung der Materialeigenschaften und maßgeschneiderte Mikrostrukturen lassen sich für eine Vielzahl von Prozessen geeignete Membranen und Komponenten entwickeln. Bei der Anwendung kann zwischen der reinen Gastrennung und Membranreaktoren unterschieden werden. Bei Letzteren findet zusätzlich zur Gastrennung eine chemische Reaktion auf einer oder beiden Seiten der Membran statt. Membranreaktoren können zur Herstellung von Basischemikalien oder synthetischen Kraftstoffen genutzt werden. Die Bereitstellung von Gasen kann für Kraftwerke, Zement‐, Stahl‐, oder Glaswerke sowie für den medizinischen Sektor oder für mobile Anwendungen von Interesse sein.

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Mechanical properties of pure and doped cerium oxide

Cited by 23 publications

References 34 publications

Mechanical Properties of Gelcast Cerium Dioxide From 23 to 1500 °C

Mechanical Properties of Gelcast Cerium Dioxide From 23 to 1500 °C

Ceramic Membranes: Materials – Components – Potential Applications

Keramische Membranen: Materialien – Bauteile – potenzielle Anwendungen

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