Single crystal ZnO has large number of potential commercial applications

so it is important to get the centimeter-size crystals of high purity

high quality ZnO.The hydrothermal method is a good method to get high quality ZnO crystal.The different mineralizer have different influence on the crystal synthersize.The(influence) of different mineralizer on the morphology of ZnO crystal synthesized by hydrothermal method have been got.In this paper

ZnO crystal with some kinds of shapes were obtained when KOH or NaOH used as mineralizer at 350℃ with the factor of 35%.The concentration of mineralizer were changed within 2 mol·L

-1

to 6 mol·L

-1

.When the concentration of KOH was 2 mol·L

-1

the product was only micron-scale crystal.With the increasing of concentration of KOH

the larger crystal began to exist

the lenghth of largest crystal reached 50

1

00 μm.The exposed faces were usually negative polar faces {000

1

}

negative cone faces(p{

1

01

1

}

)hexagonal faces m{

1

010}.While NaOH was used as mineralizer

when the concentration of NaOH was 2 mol·L

-1

the larger crystal was present in the product and the length of the largest crystal was about 100 μm.When the concentration of NaOH increased

the length of largest crystal was longer than that with KOHas mineralizer and reached 200~300 μm.The exposed faces were integrate hexagonal faces m{

1

010}

but the underside and cone faces of crystals were limited.So we can draw the conclusion

both the kinds and concentration of the mineralizer have obvious influence on the morphology of ZnO crystals

but under the same condition

the length of largest crystal was longer with NaOH as the mineralizer than that with KOH as the mineralizer.