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The history of ceramic filters
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 2000The history of ceramic filters is surveyed. Included is the history of piezoelectric ceramics. Ceramic filters were developed using technology similar to that of quartz crystal and electro-mechanical filters. However, the key to this development involved the theoretical analysis of vibration modes and material improvements of piezoelectric ceramics ...
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On The Modelling Of Ceramic Combline Rf-filter
27th European Microwave Conference and Exhibition, 1997In order to design filters effectively, it is necessary to be able to predict frequency characteristics of a certain kind of filter structure suitably fast. Considering ceramic filters, instead of 3-D field analysis program, a circuit simulator program is often a good choice for a modelling tool, especially in the early stages of new filter design.
Tero Uusitupa, Jukka Loukkola
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Filtering diesel exhaust gases with ceramic filters
Chemical and Petroleum Engineering, 2008Results are given from three test series on a ceramic filter for diesel exhausts. In the first and second series, use was made of diesel fuel (in the summer), while in the third series, we used the Standard Euro-4 fuel. A grain-size analysis is given for the dust.
A. Yu. Val’dberg +4 more
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Testing ceramic filter elements
Chemical and Petroleum Engineering, 2010It is shown that for cleaning hot (above 350°C) gases from highly disperse dust (carbon black) to low residual concentrations of it (not more than 1 mg/m3), it is advisable to use heat-resistant ceramic filter elements in which aluminosilicate fibers are used as filler and a mixture of organic and inorganic substances as binder.
N. V. Kabanov, V. S. Koryagin
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Microwave ceramics for resonators and filters
Current Opinion in Solid State and Materials Science, 1996Abstract High-permittivity ceramics make it possible to noticeably miniaturize passive microwave devices. These ceramics must fulfil the requirements of high permittivity, very low dielectric losses and an extremely low temperature dependence of permittivity to yield temperature-stable resonators.
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Ceramic honeycomb filters and catalysts
Current Opinion in Solid State and Materials Science, 1997Abstract Ceramic honeycombs are widely used as catalyst supports and as particulate filters for vehicular emission control. New geometries and materials have been developed for both mobile and stationary applications. Some recent examples are zeolite and carbon honeycomb adsorbers, low expansion heat exchangers, membrane-coated gas filters and finned
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Regeneration of Rigid Ceramic Filters
1993The important issues to be addressed in specification and operation of ceramic filters at high temperatures are the long term conditioning behaviour and the filter “cleanability.”. These two aspects of filtration behaviour are inextricably linked and, at the present state of knowledge, very much system-specific, so that experimental work using the dust
D. Koch +3 more
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Ceramic-filter behavior in gasification
Bioresource Technology, 1993Abstract Enviropower Inc., a joint venture of Tampella Power Inc. and Vattenfall Engineering AB, is developing a new process for power generation based on the integrated gasification combined cycle (IGCC). This IGCC concept incorporates the pressurized fluidized-bed gasification of different solid fuels (the U-Gas process), applying air-blown ...
Arto Lehtovaara, Wahab Mojtahedi
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1997
The word ‘filtration’ refers to separation of particles from a fluid by passage through some form of porous medium. A distinction can be drawn between two main types of filtration behaviour: ‘depth’ filtration and ‘surface’ (or ‘barrier’ or ‘cake’) filtration (Figure 6.1).
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The word ‘filtration’ refers to separation of particles from a fluid by passage through some form of porous medium. A distinction can be drawn between two main types of filtration behaviour: ‘depth’ filtration and ‘surface’ (or ‘barrier’ or ‘cake’) filtration (Figure 6.1).
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