دانلود رایگان مقاله لاتین مخلوط کائولن تالک بوکسیت از سایت الزویر
عنوان فارسی مقاله:
اثرات دو مخلوط کائولن تالک بوکسیت و درجه حرارت شلیک به ویژگی سرامیک مبتنی بر کوردیریت
عنوان انگلیسی مقاله:
Effects of two mixtures of kaolin-talc-bauxite and firing temperatures on the characteristics of cordierite- based ceramics
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
Cordierite (2MgO·2Al2O3·5SiO2) is one of the most important components within the MgO-Al2O3-SiO2 phase diagram due to its unique and outstanding chemical, thermo-mechanical, thermal shock resistance, dielectric and low thermal expansion properties [1–5]. It can be used as substrate in production of microelectronics, firing tray in furnace or as support in many catalytic reactions [1–5]. Taking into account that it is not abundantly present in the nature, cordierite has to be synthesized. Many authors have reported preparation of cordierite according to various raw materials and techniques [6–10]. A great number of studies have been done on the synthesis of cordierite bodies from natural raw materials (talc and kaolin; andalusite and stevensite; kaolin, quartz and sepiolite; kaolin, talc and hydromagnesite) or from raw materials and additives (kaolin, talc, silica and alumina; talc, kaolin, silica and feldspar; phosterite, silica and quartz; Al-rich anodising sludge, talc, diatomite) [4,5,11–16]. Several methods are proposed for the synthesis of cordierite ceramics including solid-state reaction [17], wet chemical methods such as sol-gel processes, hydrolysis, spray-pyrolysis and combustion synthesis [6,18–20]. It was shown that the formation of cordierite and its transformation from μ– cordierite to α-cordierite are related to the type of starting raw materials [21]. Also, it was observed in the MgO-Al2O3-SiO2 phase diagram that μ-cordierite is often formed at lower temperature and the latter is transformed into α-cordierite with increasing temperature. α- cordierite can directly be formed from amorphous phase and it possesses both very low dielectric constant and low dielectric loss. However, the values of these latter constants vary depending on the processing parameters, particle size distribution, initial raw materials, stoichiometric compositions, phase contents, etc. [6]. Some authors
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کلمات کلیدی:
Scientific American: Supplement https://books.google.com/books?id=js8wAQAAMAAJ 1905 - Mechanics The mixture is shaken smartly to render it milky. A soft, fatty, comminuted mass, as of chalk, kaolin, gypsum, magnesia, or talc, is introduced into the mixture, forming a ... The two operations should take place without taking the pieces from the bath. .... First, fluoride of alumina is prepared from 1 clay, kaolin, bauxite or other ... The Brickmaker - Volumes 17-20 - Page 8 - Google Books Result https://books.google.com/books?id=bx44AQAAIAAJ 1893 - Bricklaying Bauxite is a ferruginous hydrate of alumina of varying composition. ... of 1 to 2 parts Goettrveih clay and 2 parts burnt bauxite from the Wochein. ... equal to the best elutriated zettlitz Kaolin, which contains somewhat more silica and less water; ... or compacl tale H2Mg3Si,0M or 3Mg04Si02-|-H20; talcoss slate or genuine talc. Patent US9382468 - Hydraulic fracturing proppant containing ... - Google www.google.com/patents/US9382468 Jul 5, 2016 - Patent Citations (12), Non-Patent Citations (2), Referenced by (1), Classifications (41), ... The composition of claim 10 , wherein the composition is fired at .... is above 45 weight percent, and the wollastonite is used only with talc, .... This additive was introduced into a mixture of kaolin and a bauxite having a ... [PDF]bentonite, kaolin, and selected clay minerals - World Health ... www.who.int/ipcs/publications/ehc/ehc_231.pdf by RB Williams - 2005 - Cited by 59 - Related articles Oct 11, 2001 - 1.7 Effects on other organisms in the laboratory and field 6 ... 6.5.2 Kaolin and quartz. 85 ..... Kaolin or china clay is a mixture of different minerals. ..... Talc-Pyrophyllite ... bauxite, zircon, rutile, kyanite, silliminate, graphite, attapulgite, and ... fire clay. Ball clay consists primarily of kaolinite, with minor amounts. The Mining Journal - Volume 82 - Page 370 - Google Books Result https://books.google.com/books?id=RNE_AQAAMAAJ 1907 - Mineral industries Has the “ Globe " ever reflected upon the awful effect its pink sheet produces when it ... Tilt-2 current issue of the “ Zentralblatt fi'ir Eisenhi'rttenwesen " contains the usual ... “Properties and Analysis of Explosive Gaseous Mixtures—Especially Air and ... kieselguhr, tripoli, talc, pipeclay, kaolin, pumice stone, crushed porcelain, ...
