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In numerous industries, such as construction industry and oil refining, as well as in automotive industry and aerospace engineering, thermal insulation is an essential factor. The aim is to minimize heat transfer while maintaining lightweight, cost-effective materials. Hollow microspheres of ceramic that is based on the coal fly ash have come up as an outstanding solution in thermal insulation cases. Hebei Hezhen Industrial Co., Ltd. is a company that is specialized in crushing, processing and sales of non-metallic minerals such as cenospheres.
What Are Cenospheres and How Are They Produced
Cenospheres are hollow, noncombustible spheres, made mainly of silica and alumina and are light in weight. They are naturally created when coal is used to generate power in thermal power plants. When coal is exposed to high temperatures it melts mineral impurities and the result is small bubbles. When these bubbles are cooled, they become hollow glassy bubbles.The word ‘cenosphere’ originates from Greek words meaning empty sphere. They are generally 10-350 microns in diameter and have wall thicknesses of 5-10 percent of the diameter of the sphere. Since there are gases such as CO2 or N2 inside hollow cenospheres, the cenosphere has low density. Hebei Hezhen Industrial Co., Ltd. Collected cenospheres from well controlled sources and refined to remove impurities and to reach a normal particle size distribution.
Why Cenospheres Excel at Thermal Insulation
The hollow structure of cenospheres directly gives them the thermal insulation performance. The air that is contained in each sphere is a poor conductor of heat, i.e., heat energy cannot freely pass from one side of the material to the other. When cenospheres are added to a substance like paint, epoxy, concrete, or plastic, they form an uncountable number of microscopic air bubbles in the substance. This significantly decreases thermal conductivity as compared to that of the solid matrix. The cenospheres are also spherical in shape and thus, they reduce the contact between the particles and further decrease the heat transfer pathways. Hebei Hezhen Industrial Co., Ltd. produces cenospheres with uniform wall thickness and size distribution,ensuring predictable thermal performance in customer formulations.
Lightweight Benefits for Insulation Products
In addition to thermal performance, cenospheres have a considerable difference in weight. Cenospheres are usually very light with densities of between 0.4 and 0.8 grams per square centimeter compared to most common mineral fillers. An example of such is calcium carbonate, which has a density of approximately 2.7 grams/cubic centimeter. Substitution of traditional fillers with cenospheres is capable of cutting weight of the insulation products by half or more without compromising or even deteriorating the thermal characteristics. This weight saving will help in transportation, handling and installation. In the case of spray-applied insulation materials, low weight implies less weight is exerted on the vertical surfaces and there is less sagging. In the case of insulation panels or boards, reduced weight is easier to mount and minimizes the structure. As a leading manufacturer of cenospheres, Hebei Hezhen Industrial Co., Ltd. provides cenospheres in various density grades to suit various application requirements and supported with its ISO 9001:2000 certified quality management system.
Applications in High-Temperature Coatings and Refractories
The capacity to resist the high temperatures is one of the most valuable properties of cenospheres. Made of ceramic materials of high melting point, cenospheres are not subject to melting even at a temperature above 1000 degrees Celsius. This makes them suitable for thermal insulation coating used on boilers, furnaces, pipes, and exhaust systems. Cenospheres in conjunction with appropriate binding agents will develop insulation coatings that reduces heat loss, protects underlying surfaces and also increases energy efficiency. In refractory application, Cenospheres will be used to produce lightweight insulating brick and castable that offers both thermal and structural integrity. Cenospheres offer permanent, fire proof insulation as opposed to organic insulation materials which may char or combust at high temperatures. Hebei Hezhen Industrial Co., Ltd. is the provider of cenospheres which can be used in the industrial high temperature application with stringent quality control in terms of both chemical composition and thermal stability.
Enhancing Building Materials and Construction Products
Cenospheres are gaining popularity in building materials as a thermal insulation in the construction industry. Cenosphere lightweight concrete Aerated or cellular concrete or Cenosphere lightweight concrete is an insulated concrete material that provides excellent insulation and reduces dead load structure. Cenospheres are a good addition to cement boards and plaster formulations because they do not affect the workability and cement boards strength. The cenospheres applied as roofing materials are reflective, thereby reducing the solar gain and lowering the air conditioning cost in hot regions. Cenospheres may be applied in binder systems to supplement conventional insulation batts and boards. Hebei Hezhen Industrial Co., Ltd. has collaborated with the manufacturers of construction materials to develop custom trade-offs of cenosphere grades between insulation performance, density and cost. Cenospheres provide an exclusive blend of thermal insulation, lightness, stability at high temperatures, and chemical inertness, which are hard to find in other materials. Cenospheres are used in industrial finishes and refractories, building materials and specialty composites to assist the manufacturer of the product to save energy and reduce weight and act reliably throughout its service life. Hebei Hezhen Industrial Co., Ltd. sincerely invites both domestic and foreign merchants to trade with its company, cooperate and work towards the mutual development.
