Studies On The Preparation Of High Purity,Spherical And Nanometer Zinc Oxide Powder Materials From Zinc Sand Calcined By Hydro-Chemical Method

Nanostru戊＂red materlalsgo bythe name of＊thealsgo most potemlal In the Zlstcemury．Slncethe conception ofnanostru吐uredmaterlals cametobeing,manycon血nes'science and technology ield have draw甜emlonto It巳哎enslvely all0＊er山e—ofNaM山e hh扯ends h叫e昨coffie an M比p仇of加别c比Sea fCfCh aMexploitation In domain ofmaterlal Science and agglomerate statePhyslcs．In allkinds ofpreparatlon method ofnanometerpowde． hydro－chemical method Is usedextensively because ofordlnary operation,common reaction conditions and goodcofitltrollablllty．Howeve＼ Inthe whole process of＊thes method,It Is possible for thegrowing up of＊theg particles and the formation of＊theion agglomeration．As a result,howto control the size and good dlsperslblllty ofpartlcles Is one of＊thelcles mostlmporta血 problems In the preparation ofnanom缸er materials by hydro－chemicalmethod．As a new important Inofganlc chemical material,nanometer zinc oxide powder hasmany specific excellent physical and chemical prop瞅ies,and came out enormousaPplication foreground．PresemlX many scholar Inside and omslde ofstate havereported much ofpreparing nanom幻er zinc oxide powderby hydro－chemicalmethod．Though zinc salt ofanalytlcal re吧em has been used for the raw matenals,thCh8VC IIOt ClltlfCly SOIVCdthCpfoblCffi Ofp＆rtlCIC'Sgfsfilllsflty sfld fCllllltCyCt．DIs a little while to report preparation ofnanom幻er zinc oxide from zinc mineraldirectly．Thismanufacturlngtechnologydeslgnedofhlghpurltx spherical and 二仰nanometer zinc oxide powder, leaching out from zinc sand calcined by the sulfuric acid, purifying of leaching liquor, synthesizing bi-hydration oxalic acid zinc, ultrasonic cleansing, vacuum drying and hot decomposing was studied and explored systematically. The zinc oxide powder obtained by this method was test by XRD, TEM, IR, BET, EDTA chemical analysis ICP and so on. The results show that purity of ZnO is over 99.8%, the shape of crystalline is in hexagonal structure, and its has an average diameter of 23 nm with good dispersibility. The specific surface area is over 54 m2 per gram. Each technic index is better than its relative ultra-fine ZnO standard of HG/T25 72-94. So it will offer good reference value to industry test of nanometer zinc oxide from zinc mineral and will take on application foreground expansively.