Firebrick Features

Own property
1, the chemical composition of : determining the main component of the quality and characteristics of the refractory
2 , bulk density: weight per unit volume , density , indicating good density , high strength may , but probably large thermal conductivity
3 , apparent porosity : not to make a CBN abrasive grit specific request, but manufacturers must be strictly controlled as apparent porosity .
4 , RUL : Also called high-temperature load deformation temperature start , this parameter is very important, high temperature resistance marker material
5, the thermal shock resistance : resistance to sudden temperature change capacity without being destroyed
6 , the compressive strength : bear ( room temperature ) maximum pressure capability
7 , flexural strength : the ability to CBN abrasive grit withstand the shear stress
8 , the linear rate of change : change , also called heavy firing line or call residual line changes , refer to the expansion and contraction of each change in volume occurs at the same temperature change , if every expansion and contraction , we define such a linear rate of change 0
Physical and chemical properties
1, wear resistance :
2 Thermal conductivity : the unit temperature gradient conditions by the rate of heat flow per unit area of ??the material , with a porosity of about
3 , Impact resistance: do not explain it , good impact resistance , service life is long
4 , slag resistance : ability without being destroyed slag erosion resistance at high temperatures

Modern glass beads

Glass bead jewelry is a common accessory, widely used in clothing, evening dresses, shoes, hats, handbags, hair, wool textiles, beaded, lighting, handicrafts, etc.
With the state-controlled natural gas, a direct result of rising costs of production of glass beads, glass beads manufacturers Daqing dwindling, however, some of the star Yongqing glass beads enterprises CBN abrasive grit gradually transforming ideas, using coke instead of natural gas, it will not only reduce the firing of glass Beads of cost, it can re-use resources, greatly improving energy efficiency, but also played a role in environmental protection.
Reflective glass beads into ordinary high refractive index glass beads and glass beads. Ordinary glass beads for road paint mainly the refractive index of 1.5 or greater

CBN Profile

Cubic boron nitride , the formula BN, diamond-like crystal structure , lower hardness than diamond is HV72000 ~ 98000 MPa , and the tool used as the abrasive material . In 1957 , RH temperature Rostov USA first developed cubic boron nitride.
For a long time , the CBN is considered non-existent CBN abrasive grit in nature , until 2009 , the American University of California, Riverside , Lawrence Livermore National Laboratory scientists and their counterparts from China , Germany, together with research institutions , found in the mountainous Tibetan Plateau in southern China about 306 kilometers deep underground ancient oceanic crust of this mineral chromium-rich rocks , which at about 1300 degrees Celsius , atmospheric pressure conditions 118,430 formed crystals. The team with Professor Qing-Song Fang Institute of Geology, Chinese Academy of Geological Sciences names new mineral named qingsongite ( suffix ite said mineral ) . International Mineralogical Association in August 2013 formally recognized that this is a new mineral - CBN . And the atomic structure of diamond- like carbon atoms in the structure, it has the characteristics of high density and hardness comparable to the diamond , and the tool is often used as an abrasive material .
CBN CBN (Cubic Boron Nitride) is the first use in the 1950s by the U.S. General Electric (GE) company artificially synthesized under high temperature and pressure conditions , and its hardness only to diamond and is much higher than other materials , thus it is referred to CBN abrasive grit as superhard materials and diamond .
CBN
CBN is a hexagonal boron nitride and catalyst at high temperature synthesis , following the advent of synthetic diamond appeared a new type of high-tech products . It has high hardness, thermal stability and chemical inertness , and good rosy appearance and wide band gap , excellent performance , it is second only to diamond in hardness , but much higher than the thermal stability of James Bond stone, iron -based metal element has a greater chemical stability. CBN abrasive grinding performance is excellent , not only capable of performing difficult to grind materials processing , increase productivity , but also effectively improve the grinding quality of the workpiece. CBN is a major contribution to the use of metal processing , leading to revolutionary changes grinding , grinding is the second leap in technology .

Diamond Case

Yuan Shi
December 2010, Japanese scientists
Cylindrical "Yuan Shi"
Successfully synthesized the world's hardest diamond, more than 1 cm in diameter, and strive to cooperate with the fastest production company said.
This is the result CBN abrasive grit of a cylindrical diamond Ehime University researchers in Japan with Sumitomo Electric Industries, Inc. cooperation, was named "Yuan Shi", taken from "Ehime."
Tetsuo researchers into the boat, said Yuan stone is the world's hardest artificial diamond, diamond-hard, a lot CBN abrasive grit more than ordinary, and therefore can be applied to many industrial activities were. "Yuan Shi can help people learn more about carbon elemental crystals under high pressure and temperature conditions deep in the earth formation; same time, as a kind of industrial supplies, its life expectancy is several times longer than ordinary diamond.

CBN Profile

Cubic boron nitride , the formula BN, diamond-like crystal structure , lower hardness than diamond is HV72000 ~ 98000 MPa , and the tool used as the abrasive material . In 1957 , RH temperature Rostov establishment of the United States first developed CBN .
For a long time , the CBN is considered non-existent in nature , until 2009 , the American University of California, Riverside , Lawrence Livermore National Laboratory scientists and their counterparts from China , Germany, together with research institutions , found in the mountainous Tibetan Plateau in southern China about 306 kilometers deep underground ancient oceanic crust of this mineral chromium-rich rocks , which at about 1300 degrees Celsius , atmospheric pressure conditions 118,430 formed CBN abrasive grit crystals. The team with Professor Qing-Song Fang Institute of Geology, Chinese Academy of Geological Sciences names new mineral named qingsongite ( suffix ite said mineral ) . International Mineralogical Association in August 2013 formally recognized that this is a new mineral - CBN . And the atomic structure of diamond- like carbon atoms in the structure, it has the green silicon carbide characteristics of high density and hardness comparable to the diamond , and the tool is often used as an abrasive material .
CBN CBN (Cubic Boron Nitride) is the first use in the 1950s by the U.S. General Electric (GE) company artificially synthesized under high temperature and pressure conditions , and its hardness only to diamond and is much higher than other materials , thus it is referred to as superhard materials and diamond .
CBN
CBN is a hexagonal boron nitride and catalyst at high temperature synthesis , following the advent of synthetic diamond appeared a new type of high-tech products . It has high hardness, thermal stability and chemical inertness , and good rosy appearance and wide band gap , excellent performance , it is second only to diamond in hardness , but much higher than the thermal stability of James Bond stone, iron -based metal element has a greater chemical stability. CBN abrasive grinding performance is excellent , not only capable of performing difficult to grind materials processing , increase productivity , but also effectively improve the grinding quality of the workpiece. CBN is a major contribution to the use of metal processing , leading to revolutionary changes grinding , grinding is the second leap in technology .

Ya Yu Gang

Corundum high quality bauxite purity as the main raw material, through a unique formula above 2300 ℃ in electric arc furnace smelting and refining temperature delay processing by a special process, high temperature, corrosion, erosion, low porosity, thermal stability performance advantages. Effectively solve the detonation corundum occur when alternative white fused alumina and other aluminum group, cracking, chalking and other issues. Practice has proved that a white fused alumina, tabular alumina and fused dense corundum ideal alternative.
Corundum of sand (Barmac plastic), powder (pickling) has not burst, not powder bulk density and large, good fluidity characteristics in use. It can be widely used to produce a variety of unshaped refractory materials and other products and corundum pouring bulk materials and unshaped refractory products corundum light burning.

Refractory mineral composition

Refractory products are mineral composition body. Nature of the product is its mineral composition and microstructure of a comprehensive reflection. Refractory products depends on its chemical composition of the mineral composition and process conditions. The same chemical composition of products, due to different process green silicon carbide conditions, the mineral phase of the species, the number of grain size differences, and binding of formation, its performance may be quite different. Such as SiO2 content of siliceous same products, because SiO2 may form different structures and properties of two types of minerals under different conditions - phosphorus quartz and  green silicon carbide  , so there will be some differences in the nature of products. Even if some articles in the mineral composition, but with different grain size of the mineral phase, shape and distribution will also have a significant effect on the nature of the article

CBN grinding wheel

CBN (cubic boron nitride) abrasive structure CBN (cubic boron nitride) grinding the general structure of the operating layer, the substrate, the buffer layer consists of three parts. CBN layer known as a working layer, the abrasive, binders and fillers, is abrasive synthetic diamond working portion. The buffer layer is also called non-CBN layer of binding agent, and a filler metal powder is firmly attached to the part of the base layer of the CBN. The base is machined from aluminum, steel or made ​​of bakelite, supporting work from abrasive layer and the role of chucking.

White fused alumina abrasive

White corundum abrasives, white fused alumina, white fused alumina block, white fused alumina abrasive, white corundum sand
White fused alumina abrasive is as raw materials, high temperature melting together. White, slightly higher hardness CBN abrasive gritthan corundum, toughness lower. Made with white corundum abrasives for grinding high carbon steel, high speed steel and hardened steel and the like. White corundum abrasives, corundum abrasive polishing materials can be used, but also for precision sand casting, coating materials, chemical catalyst carrier, special ceramics, advanced refractories.
White fused alumina abrasive properties: white, hard and brittle compared with corundum, cutting force is strong, good chemical stability, has good insulating properties.
White fused alumina Fused zirconia mullite abrasive Scope: do solid structure and coated abrasives, wet or dry sand jet for crystal, ultra-fine grinding and polishing of the electronics industry and production of advanced refractory. Suitable for machining hardened steel, alloy steel, high speed steel, high carbon steel and other hard hardness, tensile strength greater material. White fused alumina abrasives can also be used as catalyst, insulators and precision casting sand.