Study Of ATO Conductive Powders In Antistatic And Electromagnetic Shielding Ceramics

Along with the continuous application of electronic products, electrostatic hazards and electromagnetic pollution is growing. The ceramics is one of important overbuerden layer materials in the building industry. Antistatic ceramics not only provides the surface of the adornment of interest, but also virtually eliminating the dangers of static electricity and electromagnetic radiation to industry and human body.This thesis take the ATO(Antimony Doped Tin Oxide)conductive powder as anti-static powder. ATO powder was prepared by hydrolysis of alkoxides method and self-propagating combustion method. The results show:alkoxides method were more suitable than combustion method.The best preparation conditons of alkoxides method are reaction pH 2, the calcinations temperature 600℃,the amount of SbCl3 6%.To improve the characters of particle, we attempt to dope some kinds of oxides and find compared with undoped powder, the conductivity of doped-ZnO2 is greatly improve. The resistance of powder can reach 1.864Q-cm.Nanometer titanium dioxide conducive powder was prepared,in which titanium dioxide particles were coated by conductive layer of SnO2 doped Sb.The nanometer conductive powder with 37Q-cm volume resistivity.Ceramic body were prepared by doped-ZnO2 ATO conductive power. the resistance of ceramic body can reach the requirements of anti-static materials when mixed in 15% ATO; ceramic body mixed in 30% doped-ZnO2 and glaze were mixed in doped powder or titanium conductive powder, then prepared two types of anti-static ceramic samples. the results showed that:when the glaze doped conductive powder content of 5%, the overall conductivity of ceramic can reach the requirements of anti-static materials; the ceramic has a shielding effect when addition of 30%, the electromagnetic shielding effectiveness in low-frequency reach 31.12dB, can effectively absorb low-frequency electromagnetic waves. when mixed 10% nanometer titanium dioxide conductive powder in glaze layer,the samples can reach the requirements of anti-static materials, not only reduced about 25% of the amount of ATO powder, also made of ceramic with the antibiotic and self-cleaning features.