دانلود رایگان مقاله لاتین پتانسیل ساخت بدنه سرامیک از سایت الزویر
عنوان فارسی مقاله:
پتانسیل های ساخت بدنه سرامیک متخلخل از کائولن برای برنامه های کاربردی بستر کاتالیزوری
عنوان انگلیسی مقاله:
Potentials of fabricating porous ceramic bodies from kaolin for catalytic substrate applications
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
The presence of porosity in materials for industrial applications is often viewed as problematic. However, there are many applications in which the use of porous materials can be advantageous or even necessary, for example in filters, membranes, catalytic substrates, thermal insulation, gas burner media, and as refractory materials. Generally, porous ceramics are usually understood as materials having porosity levels which are over 30% (Guzman, 2003). They could be considered as systems that consist of a solid substance that forms walls between pores (a skeleton) and air that normally fills the pores. The composition, pore characteristics, and crystal structure are the main parameters determining the thermo-physical properties of porous ceramics (Ulyanova et al., 2006). Various processing routes/methods have been applied in manufacturing porous ceramics and they have recently been reviewed by Studart et al. (2006). These methods include but not limited to replica, sacrificial template and direct foaming methods while many other techniques are being developed, where a change of a host of parameters leads to different types of product from the same starting materials. The development of porous ceramics is attractive because porous ceramics are more stable in severe environments and they can be engineered to satisfy specific requirements due to their surface characteristics. Various porous media such as metal foams (Dukhan, 2012), wood (Kim and Pal, 2010), porous polymers (Liu et al., 2014), porous nano-composites (Li et al., 2012) and ceramic foams (Colombo, 2002) have been used for a variety of industrial applications in battery electrodes, vehicular furnishing, catalytic converters, etc. Amongst the porous materials, there has been an increasing demand for porous ceramics in industrial applications due to their high temperature stability and the ability to tailor their pore sizes for specific operations. (Efavi et al., 2012; Hammel et al., 2014). Porous ceramic bodies are usually made from aluminosilicates and several technologies are available for their fabrication (Chen et al., 1998; Sandford and Sibley, 1996). The nature of raw materials used in the various fabrication routes however affects the porosity (pore size), surface, chemical inertness and also the thermal shock resistance of porous ceramic bodies (Taslicukur et al., 2007). Kaolinite has gained a lot of research interest due to its relative simplicity both structurally and chemically. Though it usually contains a variety of structural defects, the structural orderliness of these kaolinites tend to influence many of the properties which are exploited industrially. Kaolinite and more specifically ordered kaolinite have been found to be of immense application in alum and alumina production (Al-Zahrani and Abdel-Majid, 2004; Hosseini et al., 2011), ceramics, zeolite catalysts, catalyst supports for auto-exhaust purification, adsorbents for heavy metals and currently in catalysis, to mention a few (Murray, 2000, 2007; Bergaya et al., 2006; Murray and Kogel, 2005; Churchman et al., 2006; Adams and McCabe, 2006).
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کلمات کلیدی:
Porosity of Ceramics: Properties and Applications https://books.google.com/books?isbn=0824701518 Roy W. Rice - 1998 - Technology & Engineering While zeolite particles can be fabricated into bulk bodies, doing so while ... methods with potential for fabricating/processing novel porous materials are: 1) ... 26th Annual Conference on Composites, Advanced Ceramics, Materials, ... https://books.google.com/books?isbn=0470295201 Hua-Tay Lin, Mrityunjay Singh - 2009 - Technology & Engineering Ceramic Engineering and Science Proceedings, Volume 23 Hua-Tay Lin, ... successful, much use of beads and balloons to make porous bodies is with them in ... An emerging fabrication technique that has potential for very broad impact on ... Advances in Ceramic Coatings and Ceramic-Metal Systems: A Collection ... https://books.google.com/books?isbn=0470291621 Dongming Zhu, Kevin Plucknett - 2009 - Technology & Engineering Porous Al1O3/monolithic A1103 brazed samples were fabricated, and the ... With small additions of V105, the Ag infiltrated the porous body until the V105 was ... INTRODUCTION Nanoporous alumina (A1103) ceramics have potential ... Production of porous Calcium Phosphate (CaP) ceramics with aligned ... https://biomaterialsres.biomedcentral.com/articles/10.1186/s40824-015-0037-z by WY Choi - 2015 - Related articles Jul 3, 2015 - Porous CaP ceramic scaffolds with aligned pores were successfully produced using ... excellent in vitro biocompatibility, suggesting their potential as the bone scaffold. ... Thus far, a variety of manufacturing techniques have been ... °C. The frozen CaP/camphene green bodies were then extruded through a ... Ad Porous Ceramics - Custom Parts and Components Adwww.ceramics.net/+1 802-527-7726 Technical Ceramics Production Industries: Mining, Energy, Printing… PrototypingEngineering ExpertiseManufacturing ServicesRequest For Quote
