The Experts below are selected from a list of 66 Experts worldwide ranked by ideXlab platform
Martin Jansen - One of the best experts on this subject based on the ideXlab platform.
-
Digestion Methods for Advanced Ceramic Materials and Subsequent Determination of Silicon and Boron by Inductively Coupled Plasma Atomic Emission Spectrometry
Journal of Analytical Atomic Spectrometry, 1997Co-Authors: S. Mann, D. Geilenber, José A. C. Broekaert, Martin JansenAbstract:Various wet chemical digestion procedures, such as pressure digestion, microwave-assisted pressure digestion and decomposition via alkali fusion, were applied to different Ceramic powders including Si 3 N 4 , BN and a new Advanced Ceramic Material. The last powder was prepared from novel precursor compounds by pyrolysis of inorganic polymers, and consists of Si, B, N and C. The precision obtained in the determination of the main components Si and B by sequential ICP-AES varied from 0.6 to 3% (m/m) for Si and from 0.2 to 2% (m/m) for B depending on the digestion method and the Ceramic Material. Special attention was also given to the recovery of Si and B, which is in most cases 100% within the standard deviation, and to the time consumption for the different digestion methods, which varied between 10 min and 23 h. It will be shown how the stoichiometry of the novel Si–B–N–C Ceramic SiBN 2.35 C 0.78 can be determined reliably by ICP-AES analysis for Si and B. The C, N and O were evaluated by carrier gas heat extraction.
R. Ziebarth - One of the best experts on this subject based on the ideXlab platform.
-
filtration efficiency and pressure drop of miniature diesel particulate filters
Aerosol Science and Technology, 2013Co-Authors: J. Swanson, D. Kittelson, Winthrop F Watts, Robert A. Newman, R. ZiebarthAbstract:A method was developed to evaluate miniature diesel particulate filters (DPFs). To validate the performance of the instrumentation and test apparatus, measurements were made using silicon carbide (SiC) and cordierite miniature filters with representative microstructures. Filtration efficiency (FE), the most penetrating particle size (MPPS), and pressure drop were measured for catalyzed and uncatalyzed Advanced Ceramic Material (ACM) acicular mullite and representative commercial filters to determine the impact of substrate morphology, the formation of a soot cake, and the presence of a catalyst coating on filtration properties. FE measurements demonstrated that filter geometry and microstructure significantly influence initial filtration performance. ACM filters had high initial FE and the MPPS near ∼200 nm. Reduction of the ACM pore size in the absence of a reduction in porosity increased initial FE even more, but its influence on MPPS was not resolvable. The presence of a catalyst and washcoat on the AC...
S. Mann - One of the best experts on this subject based on the ideXlab platform.
-
Digestion Methods for Advanced Ceramic Materials and Subsequent Determination of Silicon and Boron by Inductively Coupled Plasma Atomic Emission Spectrometry
Journal of Analytical Atomic Spectrometry, 1997Co-Authors: S. Mann, D. Geilenber, José A. C. Broekaert, Martin JansenAbstract:Various wet chemical digestion procedures, such as pressure digestion, microwave-assisted pressure digestion and decomposition via alkali fusion, were applied to different Ceramic powders including Si 3 N 4 , BN and a new Advanced Ceramic Material. The last powder was prepared from novel precursor compounds by pyrolysis of inorganic polymers, and consists of Si, B, N and C. The precision obtained in the determination of the main components Si and B by sequential ICP-AES varied from 0.6 to 3% (m/m) for Si and from 0.2 to 2% (m/m) for B depending on the digestion method and the Ceramic Material. Special attention was also given to the recovery of Si and B, which is in most cases 100% within the standard deviation, and to the time consumption for the different digestion methods, which varied between 10 min and 23 h. It will be shown how the stoichiometry of the novel Si–B–N–C Ceramic SiBN 2.35 C 0.78 can be determined reliably by ICP-AES analysis for Si and B. The C, N and O were evaluated by carrier gas heat extraction.
J. Swanson - One of the best experts on this subject based on the ideXlab platform.
-
filtration efficiency and pressure drop of miniature diesel particulate filters
Aerosol Science and Technology, 2013Co-Authors: J. Swanson, D. Kittelson, Winthrop F Watts, Robert A. Newman, R. ZiebarthAbstract:A method was developed to evaluate miniature diesel particulate filters (DPFs). To validate the performance of the instrumentation and test apparatus, measurements were made using silicon carbide (SiC) and cordierite miniature filters with representative microstructures. Filtration efficiency (FE), the most penetrating particle size (MPPS), and pressure drop were measured for catalyzed and uncatalyzed Advanced Ceramic Material (ACM) acicular mullite and representative commercial filters to determine the impact of substrate morphology, the formation of a soot cake, and the presence of a catalyst coating on filtration properties. FE measurements demonstrated that filter geometry and microstructure significantly influence initial filtration performance. ACM filters had high initial FE and the MPPS near ∼200 nm. Reduction of the ACM pore size in the absence of a reduction in porosity increased initial FE even more, but its influence on MPPS was not resolvable. The presence of a catalyst and washcoat on the AC...
José A. C. Broekaert - One of the best experts on this subject based on the ideXlab platform.
-
Digestion Methods for Advanced Ceramic Materials and Subsequent Determination of Silicon and Boron by Inductively Coupled Plasma Atomic Emission Spectrometry
Journal of Analytical Atomic Spectrometry, 1997Co-Authors: S. Mann, D. Geilenber, José A. C. Broekaert, Martin JansenAbstract:Various wet chemical digestion procedures, such as pressure digestion, microwave-assisted pressure digestion and decomposition via alkali fusion, were applied to different Ceramic powders including Si 3 N 4 , BN and a new Advanced Ceramic Material. The last powder was prepared from novel precursor compounds by pyrolysis of inorganic polymers, and consists of Si, B, N and C. The precision obtained in the determination of the main components Si and B by sequential ICP-AES varied from 0.6 to 3% (m/m) for Si and from 0.2 to 2% (m/m) for B depending on the digestion method and the Ceramic Material. Special attention was also given to the recovery of Si and B, which is in most cases 100% within the standard deviation, and to the time consumption for the different digestion methods, which varied between 10 min and 23 h. It will be shown how the stoichiometry of the novel Si–B–N–C Ceramic SiBN 2.35 C 0.78 can be determined reliably by ICP-AES analysis for Si and B. The C, N and O were evaluated by carrier gas heat extraction.
