Alumina ceramic (alumina ceramics) to alpha-Al2O3 ceramic material mainly composed of alpha-Al2O3 has a high melting point, hardness, chemical resistance, excellent dielectric properties, alumina various forms the most stable polymorph. With alpha-Al2O3 as raw material alumina ceramic structure material, its mechanical properties, high temperature performance, dielectric properties and chemical resistance are very excellent. Affect the burn quality factors: calcined alumina structural ceramics, usually adding an appropriate amount of additives such as borate, fluoride, high purity nano-Al2O3. Additives can reduce the burn temperature, promote the transformation of crystalline, remove impurities such as Na2O. Borate in addition to the effect of alkali, high temperature resistance, insulation properties, mechanical strength decreased; fluoride promotes crystal transition, and shrinkage, good activity, due to foreign substances, the introduction of impurity ions; the pure nano alumina ( reduce the sintering temperature, UG-L100G/UG-L100K) whiteness, high purity, strong anti-throw. Structural ceramic pieces, the requirements of high purity nano-Al2O3 alkoxide production the pure nano Al2O3 (UG-L100G/UG-L100K,) the best results, in which the pure taste of 4N-5N, a particle size of less than 50nm Table 10-20. The influence of additives: Due to the high melting point of Al2O3 ceramic body, is more difficult to sintering, adding some additives can improve the sintering properties, promote sintering. The additives can be broadly divided into the following two categories: one is generated and Al2O3 solid solution, one is able to generate liquid phase. The first additive variation oxide of high purity nano-alumina (UG-L100G/UG-L100K), TiO2, Cr2O3, Fe2O3 and MnO2. Close to the lattice constant and Al2O3, it is often possible to generate a solid solution and Al2O3. At the same time, they are change price oxides, Al2O3 ceramic defects due to the role of price change, activation lattice, promote sintering. Although additives for a variety of additives, the most suitable for the high-purity ceramic pieces 5N high purity alumina (UG-L100G/UG-L100K). E.g., by adding 5-15% 5N purity alumina (UG-L100G/UG-L100K), so that the Al2O3 ceramic sintering temperature reduces 50-150 ° C, increased toughness, whiteness, purity, and not easily broken porcelain and greatly energy conservation, 5N high purity alumina does not belong to the foreign matter, greatly improving the product quality. Another class of additives that promote sintering of Al2O3 due to the formation of the liquid phase, reducing the firing temperature. This class of additives are kaolin, SiO2, CaO, MgO, etc.. They can generate two, three or more complex eutectic material with other additives. Due to the liquid phase, i.e. liquid relative surface wetting forces and surface tension of the solid phase, the solid phase particles are close together and filled pores. Result in lowering the melting point at the same time, high temperature performance, insulation performance and mechanical strength decrease. Generate solid solution of high purity nano-alumina (UG-L100G/UG-L100K), structural ceramics pieces, with better performance.