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| 2. |
- Persson, A.E., et al.
(author)
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Synthesis of stable suspensions of discrete colloidal zeolite (Na, TPA)ZSM-5 crystals
- 1995
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In: Zeolites. - 0144-2449. ; 15:7, s. 611-619
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Journal article (peer-reviewed)abstract
- Synthesis of zeolite ZSM-5 in the form of stable suspensions of colloidal crystals from clear homogeneous solutions has been achieved from synthesis mixtures with low sodium and high TPAOH concentrations. The ultimate size of the discrete crystals is in the range 130-230 nm with a narrow particle size distribution. The crystal growth was monitored by the direct method of dynamic light scattering. An increasing alumina concentration was found to decrease the crystal growth rate, the number of crystals produced, and the ZSM-5 yield. The final crystal size was found to increase with increasing alumina concentration in the synthesis solution. The number of crystals produced decreased with an increased alkalinity in contradiction to what has been found for colloidal TPA-silicalite-1. This together with the presence of the two competing processes, crystal growth and crystal dissolution, which are both catalyzed by hydroxide ions, suggests the presence of an optimum alkalinity (depending on the alumina concentration).
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| 3. |
- Persson, A-E, et al.
(author)
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The synthesis of discrete colloidal particles of TPA-silicalite-1
- 1994
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In: Zeolites. - : Elsevier BV. - 0144-2449. ; 14:7, s. 557-567
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Journal article (peer-reviewed)abstract
- Discrete colloidal particles of TPA-silicalite-1 with an average particle size of less than 100 nm and with a narrow particle-size distribution have been synthesized in clear homogeneous solutions. The factors influencing particle size have been investigated. High silica contents in conjunction with high alkalinities favor the synthesis of colloidal silicalite suspensions. Polymeric silica sources result in larger particles compared to those synthesized with tetraethoxy silane-presumably due to the different nucleation kinetics. It was found that the base concentration influences nucleation behavior in that high alkalinities result in the nucleation of a relatively large number of particles. The growth rates are constant for a given silica content irrespective of the alkalinity, at least within the alkalinity range studied. This result is ascribed to a rate-limiting surface reaction step that is a consequence of the synthesis mixture composition. The linear growth rates recorded are lower than those typically reported in the literature.
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| 4. |
- Almqvist, Andreas, et al.
(author)
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Interfacial separation between elastic solids with randomly rough surfaces : Comparison between theory and numerical techniques
- 2011
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In: Journal of the mechanics and physics of solids. - : Elsevier BV. - 0022-5096 .- 1873-4782. ; 59:11, s. 2355-2369
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Journal article (peer-reviewed)abstract
- We study the distribution of interfacial separations at the contact region between two elastic solids with randomly rough surfaces. An analytical expression is derived for the distribution of interfacial separations using Persson's theory of contact mechanics, and is compared to numerical solutions obtained using (a) a half-space method based on the Boussinesq equation, (b) a Green's function molecular dynamics technique and (c) smart-block classical molecular dynamics. Overall, we find good agreement between all the different approaches.
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| 5. |
- Andersson, Roger, et al.
(author)
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Stainless steel components in automotive vehicles
- 2004
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In: Stainless Steel World. - 1383-7184. ; 16:1, s. 34-37
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Journal article (other academic/artistic)abstract
- Components linked to crash safety in automotive vehicles are required to transmit or absorb energy. The energy absorbing capability of a given component depends on a combination of geometry, material properties and loading conditions. Increased crash performance can be obtained by using materials with higher yield strength and relatively high elongation to fracture. These demands have led to increasing interest in the use of high strength stainless steels due to their relatively high elongation to fracture and good formability. To increase knowledge of the formability and forming behaviour of these materials, several components from current and prototype vehicles have been made using high strength stainless steels at Volvo Cars Body Components, Olofstrom, Sweden. These were subsequently analysed in close collaboration with the Division of Manufacturing Systems Engineering at Lulea University of Technology, Sweden.
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| 6. |
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| 7. |
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| 8. |
- Carro, Maria J., et al.
(author)
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Real interpolation for divisible cones
- 1999
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In: Proceedings of the Edinburgh Mathematical Society. - 0013-0915 .- 1464-3839. ; 42:2, s. 285-304
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Journal article (peer-reviewed)abstract
- We give necessary and sufficient conditions on a general cone of positive functions to satisfy the Decomposition Property (DP) introduced in [5] and connect the results with the theory of interpolation of cones introduced by Sagher [9]. One of our main result states that if Q satisfies DP or equivalently is divisible, then for the quasi-normed spaces E0 and E1, According to this formula, it yields that the interpolation theory for divisible cones can be easily obtained from the classical theory
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| 9. |
- Carro, Maria J., et al.
(author)
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S-divisibility property and a Holmstedt type formula
- 1999
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In: Journal of Approximation Theory. - : Elsevier BV. - 0021-9045 .- 1096-0430. ; 98:1, s. 1-24
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Journal article (peer-reviewed)abstract
- Given a conePof positive functions and an operatorS: →Pwith an additive group, we extend the concept ofK-divisibility to get some new formulas for theK-functional of finite families of lattices. Applications are given in the setting of rearrangement invariant spaces and weighted Lorentz spaces. As a consequence of our results, we also obtain a generalized Holmstedt formula due to Asekritova
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| 10. |
- Carro, Maria J., et al.
(author)
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Some real interpolation methods for families of Banach spaces : a comparison
- 1997
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In: Journal of Approximation Theory. - : Elsevier BV. - 0021-9045 .- 1096-0430. ; 89:1, s. 26-57
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Journal article (peer-reviewed)abstract
- We consider certain real interpolation methods for families of Banach spaces. We also define some new such methods obtained by passing to the limit in the constructions of Sparr and Cobos-Peetre. The relations between all these methods are studied. Characterizations of minimal and maximal spaces are obtained. Some concrete examples as well as sharp estimates of the corresponding operator norms are also exhibited.
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