矿化剂浓度对水热法合成氧化锌晶体的影响

Effect of Mineralizer Concetration on ZnO Crystals Synthesized by Hydrothermal Method

In this paper different shapes of ZnO crystals were synthesized by hydrotherma l method when different concentrations of mineralizer were used. When KOH was le ss than 2mol·L-1 and the fill factor was approximately 35%at 350℃, ZnO cryst als were synthesized with size of several hundred nanometer or several micron. T he shapes of crystals were hexagonal cones. When 3mol·L-1 KOH was used as mine ralize at 350℃and the fill factor was approximately 35%, the crystals with man y different sizes were synthesized, the size of maximal crystal was over 100 mic ron, the small-size crystals were only several micron. When mineralizer KOH was less than 1mol·L-1 and the fill factor was approximately 35%at 430℃, ZnO cr ystals were synthesized with size of several hundred nanometer or several micron . The shapes of crystals were hexagonal cones. When 1.5mol·L-1 KOH or 2mol·L -1 KOH was used as mineralize at 430℃and the fill factor was approximately 35 %, the high quality and hexagonal prism crystals were synthesized with many dif ferent sizes, the size of maximal crystal was over 100 micron, the small-size c rystal was only several micron. Especially when 3mol·L-1 KOH was used as miner alize at 430℃and the fill factor was approximately 35%, the high quality and h exagonal prism crystals were synthesized <IMG SRC="IMAGE/09150023.JPG" HEIGHT=11 WIDTH=23><IMG SRC="IMAGE/09150024.JPG" HEIGHT=11 WIDTH=23><IMG SRC="IMAGE/09150 025.JPG" HEIGHT=11 WIDTH=23><IMG SRC="IMAGE/09150026.JPG" HEIGHT=11 WIDTH=23><IM G SRC="IMAGE/09150027.JPG" HEIGHT=11 WIDTH=23>with size of 1mm along c axis. The exposed faces were hexagonal faces m{}, hexagonal cone faces p{}, negative pola r faces O{}. In addition, many crystals with the shape of hexagonal cone and in several micron to 50 μm of size were present. The exposed faces were hexagonal cone faces p{}, negative polar faces {}.

In this paper different shapes of ZnO crystals were synthesized by hydrothermal method when different concentrations of mineralizer were used. When KOH was less than 2mol . L-1 and the fill factor was approximately 35% at 350degreesC, ZnO crystals were synthesized with size of several hundred nanometer or several micron. The shapes of crystals were hexagonal cones. When 3mol . L-1 KOH was used as mineralize at 350degreesC and the fill factor was approximately 35%, the crystals with many different sizes were synthesized, the size of maximal crystal was over 100 micron, the small-size crystals were only several micron. When mineralizer KOH was less than 1 mol . L-1 and the fill factor was approximately 35% at 430degreesC, ZnO crystals were synthesized with size of several hundred nanometer or several micron. The shapes of crystals were hexagonal cones. When 1. 5mol . L-1 KOH or 2mol L-1 KOH was used as mineralize at 430degreesC and the fill factor was approximately 35%, the high quality and hexagonal prism crystals were synthesized with many different sizes, the size of maximal crystal was over 100 micron, the small-size crystal was only several micron. Especially when 3mol . L-1 KOH was used as mineralize at 430degreesC and the fill factor was approximately 35%, the high quality and hexagonal prism crystals were synthesized with size of 1 mm along c axis. The exposed faces were hexagonal faces m{10(1) over bar 0}, hexagonal cone faces p{10(1) over bar 1}, negative polar faces O{000(1) over bar}. In addition, many crystals with the shape of hexagonal cone and in several micron to 50 mum of size were present. The exposed faces were hexagonal cone faces p{10(1) over bar 1}, negative polar faces {000(1) over bar}.