Nanoscale alumina ceramic powder, composite ceramic material and preparation method thereof: Fid-Bau Portal

Nanoscale alumina ceramic powder, composite ceramic material and preparation method thereof

XIAO SHENG / WU SHA'OU / ZHONG LIPING / HE PENGHUA / LI YI

The invention provides a preparation method of nanoscale aluminum oxide ceramic powder, which comprises the following steps: mixing aluminum oxide powder with deionized water to prepare aluminum oxide slurry; adding the aluminum oxide slurry into a sand mill, sequentially adding two groups of dispersing agents for sanding, and firstly adding a first group of small-molecular-weight dispersing agents; adding a second group of dispersing agent, sanding, and adding a second group of high-molecular-weight dispersing agent; and carrying out spray granulation on the sanded slurry to obtain the nanoscale aluminum oxide ceramic powder. The invention also provides a preparation method of the composite ceramic material, and the nanoscale aluminum oxide ceramic powder and the composite ceramic material prepared by the method. According to the nanoscale aluminum oxide ceramic powder, the composite ceramic material and the preparation method of the nanoscale aluminum oxide ceramic powder, the preparation method is simple in step and low in production cost, the spherical and sphere-like nanoscale aluminum oxide ceramic powder can be prepared, and the prepared composite ceramic material has more excellent performance.

本发明提供一种纳米级氧化铝陶瓷粉体的制备方法，包括以下步骤：将氧化铝粉体与去离子水混合，制成氧化铝浆料。将所述氧化铝浆料加入到砂磨机中，再依次加入两组分散剂进行砂磨，首先加入第一组小分子量分散剂；再加入第二组分散剂并进行砂磨，再加入第二组大分子量分散剂。将砂磨后的浆料进行喷雾造粒，得到纳米级氧化铝陶瓷粉体。还提供一种复合陶瓷材料的制备方法，以及由上述方法制备的纳米级氧化铝陶瓷粉体和复合陶瓷材料。本发明提供的纳米级氧化铝陶瓷粉体、复合陶瓷材料及其制备方法，其制备方法步骤简单、生产成本低，且能够制备球形及类球形的纳米级氧化铝陶瓷粉体，其制备的复合陶瓷材料具备更优异的性能。

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