APPLICATION OF A NEW AGGLOMERATION PARAMETER IN CHARACTERIZING THE STATE OF AGGLOMERATION OF ULTRAFINE ZIRCONIA POWDERS
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摘要: 提出了新的团聚参数Na(50),定义为团聚体平均包含粉末一次颗粒的数目。以共沉淀法制备的ZrO2(Y2O3)超级粉末的团聚状态为研究对象,将Na(5)与目前较常用的团聚参数AF(50)及AF*(50)进行了比较。结果表明,Na(50)能更好地反映粉末的实际团聚状态。此外,导出了团聚体的平均Stokes球径与团聚体相对密度的关系。Abstract: A new agglomeration parameter Na(50) defined as the average primary particle number included in each agglomerate is proposed. With the application of characterizing the saute of agglomeration of ultrafine ZrO2 (Y2O3) powders prepared by co-precipitation, a comparison between Na(50) and the currently used agglomeration parameters AF(50) as well as AF*(50) is made. The resultS show that the parameter Na(50) is better in representing the true state of agglomeration of poWders. In addition,the relations between the average Stokes diameter and the relative density of the agglomeration has been inferred.
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Key words:
- agglomeration /
- zirconia /
- ultrafine powder
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