ceramic honeycomb is nearly thirty years to develop a structure like a honeycomb shaped ceramic products. the earliest use of the small automobiles exhaust purification to today's widely used in chemical industry, electric power, metallurgy, petroleum, electronics, machinery and other industries, but also more and more extensive, development foreground is considerable.
honeycomb ceramic countless equal holes of various shapes, the largest number of holes per square centimeters has reached 20 ~ 40, the density of 4 to 6 grams per cubic centimeter, water absorption rate of up to 20% above. because the thin wall porous characteristics, greatly increased the vectors geometric surface area and improves the thermal shock resistance, the current products, the mesh holes to triangle and square, triangle bear force is much better than the quartet, hole number is more, this point is especially important as catalytic carrier. with the number of holes per unit area and improve the pore wall thickness reduction, ceramic carrier thermal shock trend is to raise the temperature, thermal shock damage is also increased. so the honeycomb ceramic must lower coefficient of thermal expansion and enhance the unit area of the hole number. coefficient of thermal expansion is the main performance index, the current foreign level is a 251000 c = 1 x 106 c 1, and domestic compared to a certain gap, but the gap is more and more small. the earliest production of honeycomb ceramic raw materials mainly kaolin, talc, aluminum powder, clay, and today has been a breakthrough, especially the diatomaceous earth, zeolite, expansive soil and application of refractories, ceramic honeycomb increasingly wide range of applications, the performance is getting better and better.