| The literature review on recent progress of nanometer material is given and the characteristics, applications and the state of the art of zirconia ceramics are briefly discussed in this work. Comparing several common techniques of fabricating nano-powder, we focus on the basic principal and the classification of chemical method. As the method has an .innate drawback that powder particle produced is easy to agglomerate, the mechanism of the generation and elimination of agglomeration is analyzed. According to practical applications, after introducing the principal of dispersant and the categories of surfactant, several excellent surfactants are selected for intensive study on the basis of which a complex surfactant demonstrating apparent dispersant effect in practical use is obtained.The fabricating condition and process of nanometer zirconia ceramics powder are introduced, and the characteristics of the powder fabricated using chemical method, such as particle size and it's distribution, particle shape, and dispersant peculiarity are analyzed and compared. The condition with high repeatedly peculiarity and high stability for fabricated nanometer zirconia powder is achieved through optimizing the various factor which would influence the powder capability. Sphere in shape, the manufactured nanometer zirconia powder particle are even in size with their diameters ranging from 20 to 40 nm under the TEM and SEM, and they have a narrow distribution of particle size with excellent dispersant adequacy. Analysis of powder through XRD demonstrates that stable or partly stable nanometer zirconia powder can be manufactured through adding some appropriate stable substance. |
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