Permeation of single gases in thin zeolite MFI membranes (1998)
Burggraaf, Prof.dr.ir. A.J., Vroon, Dr. Z.A.E.P., Keizer, Dr.ir. K., Verweij, Prof.dr.ir. H.
The permeation of a series of gases with widely different Lennard-Jones kinetic diameters and sorption properties is investigated as a function of feed pressure (up to 100 kPa) and temperature...
Two component permeation through thin zeolite MFI membranes (1998)
Keizer, Dr.ir. K., Burggraaf, Prof.dr.ir. A.J., Vroon, Dr. Z.A.E.P., Verweij, Prof.dr.ir. H.
Two component permeation measurements have been performed by the Wicke–Kallenbach method on a thin (3 μm) zeolite MFI (Silicalite-1) membrane with molecules of different kinetic diameters, dk. The...
Importance of electronic band structure to nonstoichiometric behaviour of La0.8Sr0.2CoO3 (1997)
Lankhorst, Dr.ir. M.H.R., Bouwmeester, Dr. H.J.M., Verweij, Prof.dr.ir. H.
The partial energy and entropy involved in the process of oxygen incorporation into the mixed oxygen ion and electronic conducting La0.8Sr0.2CoO3 was measured by oxygen coulometric titration. The...
Chen, Ir. C.S., Kruidhof, Ing. H., Bouwmeester, Dr. H.J.M., Verweij, Prof.dr.ir. H., Burggraaf, Prof.dr.ir. A.J.
Oxygen permeation measurements were performed on erbia-stabilized bismuth oxide-silver (40 v/o) composite membranes in the range of thickness of 1.60¿0.23 mm and temperature of 850¿650 °C. Air was...
Effects of a second phase on the tribological properties of Al2O3 and ZrO2 ceramics (1997)
He, Dr. Y.J., Winnubst, Dr. A.J.A., Schipper, Prof.dr.ir. D.J., Burggraaf, Prof.dr.ir. A.J., Verweij, Prof.dr.ir. H.
The tribological properties of four different materials are investigated, tetragonal zirconia (Y-ZTP), Al2O3 dispersed in Y-TZP (ADZ), ZrO2 dispersed in Al2O3 (ZTA) and Al2O3 (with 300 ppm MgO)....
Sliding wear of ZrO2-Al2O3 composite ceramics (1997)
He, Dr. Y.J., Winnubst, Dr. A.J.A., Burggraaf, Prof.dr.ir. A.J., Verweij, Prof.dr.ir. H., Varst Van De, Ir. P.G.T., With De, Prof.dr.ir. G.
The friction and wear behaviour of two ZrO2-Al2O3 composite materials, ADZ (20 wt% Al2O3 dispersed in yttria-doped ZrO2 matrix) and ZTA (Al2O3-15 wt% ZrO2), were investigated. Sliding wear tests were...
Plasticity of nanocrystalline zirconia ceramics and composites (1997)
Winnubst, Dr. A.J.A., Boutz, Dr. M.M.R., He, Dr. Y.J., Burggraaf, Prof.dr.ir. A.J., Verweij, Prof.dr.ir. H.
The deformation strain rate of nanocrystalline Y-TZP shows an increase by a factor 4 if the grain size decreases from 200 to 100 nm. Real superplastic deformation (strain rate > 10¿4 s¿1) is...
Tsiakaras, P., Marnellos, G., Athanasiou, C., Stoukides, M., Elshof Ten, Dr.ir. J.E., Bouwmeester, Dr. H.J.M., ...
The steady-state current-overpotential characteristics of the O2,La0.6Sr0.4Co0.8Fe0.2O3 − δ/YSZ interface have been studied as a function of oxygen partial pressure and temperature. Ideal Nernst...
He, Dr. Y.J., Winnubst, Dr. A.J.A., Sagel-Ransijn, Dr.ir. C.D., Burggraaf, Prof.dr.ir. A.J., Verweij, Prof.dr.ir. H.
The mechanical properties of ceramics with the compositions of 5 mol% YO1.5-TZP (ZY5) and 4 mol% YO1.5-4 mol% CeO2-TZP (ZY4Ce4) were investigated. Nanocrystalline powders of both TZPs were...
Transport properties of alkanes through ceramic thin zeolite MFI membranes (1996)
Vroon, Dr. Z.A.E.P., Keizer, Dr.ir. K., Gilde, Ing. M.J., Verweij, Prof.dr.ir. H., Burggraaf, Prof.dr.ir. A.J.
Polycrystalline randomly oriented defect free zeolite layers on porous -Al2O3 supports are prepared with a thickness of less than 5 μm by in situ crystallisation of silicalite-1. The flux of alkanes...
Oxygen permeation through oxygen ion oxide-noble metal dual phase composites (1996)
Chen, Ir. C.S., Kruidhof, Ing. H., Bouwmeester, Dr. H.J.M., Verweij, Prof.dr.ir. H., Burggraaf, Prof.dr.ir. A.J.
Oxygen permeation behaviour of three composites, yttria-stabilized zirconia-palladium, erbia-stabilized bismuth oxidenoble metal (silver, gold) was studied. Oxygen permeation measurements were...
Oxygen transport through La1 − xSrxFeO3 − δ membranes II. Permeation in air/CO, CO2 gradients (1996)
Elshof Ten, Dr.ir. J.E., Bouwmeester, Dr. H.J.M., Verweij, Prof.dr.ir. H.
Oxygen permeation measurements were performed on dense La1 − xSrxFeO3 − δ (x = 0.1-0.4) membranes in large oxygen activity gradients, i.e. air/CO, CO2, in the temperature range 1173–1323 K,...
He, Dr. Y.J., Winnubst, Dr. A.J.A., Schipper, Prof.dr.ir. D.J., Bakker, Ing. P.M.V., Burggraaf, Prof.dr.ir. A.J., Verweij, Prof.dr.ir. H.
The friction and wear behaviour of ZrO2-Y203, ZrO2-Y203-CeO2 and ZrO2-A1203 composite ceramics against hardened steel AISI-52100 were investigated using a pin on plate configuration under...