News Article | November 21, 2016
Ceramics are covalent compounds containing metal and non-metal atoms primarily held in covalent and ionic bonds. Generally, ceramics are made by taking mixtures of earth elements, powders, water and clay. This mixture is shaped into the desired form and is then fired in a high temperature oven. Ceramics are then painted with glazes which are waterproof and decorative. At elevated temperature, ceramics have high hardness, high melting points, excellent chemical corrosion resistance and good mechanical properties. Some ceramics are good dielectrics or insulators, whereas others are good electrical or thermal conductors. Ceramics are widely used in our daily life. Glass, plates, bricks, tiles and sanitary ware are some examples of the ceramics we see every day. Ceramics can also be found in products like automobiles (sparkplug), phone lines and watches. They are even used in space shuttles and aircrafts. Ceramics can be broadly classified into two categories: traditional and advanced. Traditional ceramics include clay products such as cement and glass, whereas advanced ceramics consist of pure oxides, nitrides, carbides and many others. Advanced ceramics are widely used in industrial applications where the operating temperature is generally high or which require hard substances that can withstand great pressure. Ceramics offer various advantages compared to other materials. Ceramics are more corrosion and heat resistant than polymers or metals, stiffer and harder than steel, and have a lower density than most alloys and metals. Raw material for advance ceramics materials are plentiful, inexpensive and display wide range of properties. For automotive applications, they are used in various applications like airbag sensors, spark plugs, valves, vibration sensors, pressure sensors, oxygen sensors, thermistors, catalytic converters, ceramic rotors, ceramic filters piston rings and safety glass windshields. The different types of high temperature ceramics include ceramic matrix composites and ultrahigh temperature ceramic coatings. Advanced high temperature materials are key components in the emerging material technologies, which are giving impetus to many industries. The global high temperature ceramics market is driven by several factors like replacement of materials for the sake of creating cost effective solutions, the growing demand for energy conservation across various industries, and government regulations to reduce greenhouse emissions. The global high temperature ceramics market is led by AsiaPacific (APAC) which accounts for over 40-45% of the total consumption by volume. The cost of high temperature ceramics in APAC is lesser than that in Europe, North America or Latin America. In terms of revenue, North America is the largest market followed by APAC and Europe. The cost of high temperature ceramics is expected to remain low for the next few years in the APAC region. Due to government regulations and incentives offered for sustainability and energy conservation, North America and Europe are expected to offer significant growth opportunities for the high temperature ceramics market. On the basis of industry applications, the global high temperature ceramics market is segmented into automotive, aerospace, chemical processing, metallurgical, power generation and others. Some of the most common applications of high temperature ceramics are afterburners, boilers, castings, exhaust stacks, flanges, furnaces, headers, incinerators, manifolds, molds and dies, ovens, heat exchangers, pumps, blowers, pipingand ducting. In the aerospace industry, high temperature ceramics are used in cutting edge applications, which require structural and chemical stability at extremely high operating temperatures. On the basis of composition, the high temperature ceramics are segmented into oxides (alumina, zirconia), non-oxides (carbides, nitrides) and composites (combination of oxides and non-oxides). There are many global and regional players operating in the high temperature ceramics market especially in APAC. Some of the key participants are Morgan Thermal Ceramics, ZIRCAR Ceramics, Inc., Skamol A/S, Promat International, IBIDEN Company Ltd., Rath Incorporated, General Insulation Europe Ltd., Unifrax Corporation, and Shandong Luyang Share Co. Ltd. In future, the understanding and controlling behavior of the microstructures and properties of high temperature ceramics are expected to be key elements in research activities. This research will further increase the operating temperature limits of existing high temperature ceramics.
Liu P.,Shandong Jianzhu University |
Liu P.,Jiangsu University of Science and Technology |
Zhang Y.,Shandong Jianzhu University |
Li Y.,Shandong University |
And 3 more authors.
Surface Review and Letters | Year: 2014
In this paper, effect of heat treatment on the microstructures and wear properties of laser alloying (LA) composites is investigated. LA of the T-Co50/FeSi/TiC/TiN/CeO2 mixed powders on substrate of 45 steel can form the hard composites, which increased the wear resistance of substrate greatly. Such LA composites were investigated by means of a scanning electron microscope (SEM) and a transmission electron microscope (TEM). The tempering promoted the growth of the block-shape hard phases, favoring an enhancement of the integrity of block-shape hard phases; and tempering also improved greatly the formation mechanism, guarantying the composites to have enough ability of intensity transfer. This research provided essential experiment and theoretical basis to promote the application of the laser and heat treatment technologies in the field of surface modification. © 2014 World Scientific Publishing Company.
Jing G.-H.,Shandong University |
Jing G.-H.,Shandong Luyang Share Co. |
Zhang Y.-J.,Shandong University |
Li C.-S.,Shandong Luyang Share Co. |
Qiao W.-G.,Shandong Luyang Share Co.
Rengong Jingti Xuebao/Journal of Synthetic Crystals | Year: 2015
The spinning solution for polycrystalline mullite fiber was prepared by sol-gel method, using aluminum powders, HCl and silica sol as raw materials, deionized water as solution. The effect of the amount of PVA on the spinnabiltiy of sol was inspected. The infrared absorption characteristics and the behavior of rheology of the spinning sole were studied respectively by infrared absorption spectra of FTIR and rotational rheometer. The phase composition of the precursor fibers after heat treatment was analyzed with the help of XRD. The results show that the sol is non-newtonian fluid with shear thinning property and presents no tube siphon phenomenon when the amount of additives of PVA is in the range of 2%-4%. The sol with solid content in the 30%-40% and viscosity in the 4-7 Pa·s has excellent spinnability, with sol spinnability index of 25-26 cm/s. In the spinning sol there are linear polymer chain structures of Al-O-Si, which are benefit to spinning. The main crystal phase of fiber calcined at 1050℃ is mullite. ©, 2015, Chinese Ceramic Society. All right reserved.
Jing G.,Shandong University |
Jing G.,Shandong Luyang Share Co. |
Zhang Y.,Shandong University |
Gong H.,Shandong University |
And 2 more authors.
Gongneng Cailiao/Journal of Functional Materials | Year: 2015
The polycrystalline mullite fibers were prepared by sol-gel method, using aluminum powders, AlCl3·H2O and acidic silica sol as raw materials, deionized water as solution. The aggregation state of Al3+ was tested by SAXS. The phase composition, fiber morphology, crystalline structure of mullite fibers by heated to different temperature were analyzed by XRD, SEM and HRTEM. The results of SAXS show that Al3+ ions aggregate in the PAC sol exists in the form of Al13(OH)25Cl15. XRD and SEM analysis show that the main crystal phase was mullite at 1 050℃. The crystal phase structure tends to be complete after heated to 1 200℃. The results of HRTEM show that polycrystalline structure of fiber. ©, 2015, Journal of Functional Materials. All right reserved.
Shandong Luyang Share Co. | Date: 2014-05-14
Ceramic fiber for fire-resistance; Ceramic Fiber in the forms of blanket, sheet, felt, cloth, pipe for fire-resistance; Non-conducting materials for retaining heat; Boiler composition to prevent the radiation of heat; Insulating refractory materials; Ceramic enamel fiber insulation for industrial molten metal furnaces; Insulating materials comprised of ceramic wool fiber. Refractory bricks, not of metal; Refractory tiles, not of metal; Refractory construction materials, not of metal; Fireclay; Fireproof cement coatings; Rock wool for building purposes; Mortars and refractory tubes and pipes; Ceramic shapes for use in refractory furnaces; Refractory shapes, not of metal; Non-metal partitions for building; Non-metal cladding for construction and building; Composite panels composed primarily of nonmetal materials.
Shandong Luyang Share Co. | Date: 2014-05-14
Ceramic fiber for fire-resistance; Ceramic Fiber in the forms of blanket, sheet, felt, cloth, pipe for fire-resistance; Non-conducting materials for retaining heat; Boiler composition to prevent the radiation of heat; Insulating refractory materials; Ceramic enamel fiber insulation for industrial molten metal furnaces; Insulating materials comprised of ceramic wool fiber.