利用毛细管微流体装置辅助内凝胶工艺制备小尺寸ZrO2微球

Preparation of Small-Sized ZrO2 Microspheres by Capillary Microfluidic Device Assisted Internal Gelation Process

寻找到一种室温(25℃)下稳定15 h不固化且成球较好的胶液配方,利用毛细管微流体装置辅助内凝胶工艺制备出小尺寸(<120μm)的ZrO2陶瓷微球,并对影响ZrO2微球尺寸的因素进行分析。结果表明:其它条件相同的情况下,硅油的流量或者粘度越大,ZrO2微球尺寸越小。胶液的流量越大或者毛细管微流体装置喉口尺寸越大,ZrO2微球尺寸越大;通过图像识别发现,ZrO2陶瓷微球的CV值都小于5%,说明该方法制备出的ZrO2陶瓷微球尺寸均一;通过SEM和XRD发现ZrO2陶瓷微球致密,呈立方相。

We find a broth formulation that is stable at room temperature(25℃) for 15 h without solidifying and is benificial for forming gel microspheres.Using a capillary microfluidic device assisted internal gelation process,small-sized(<120μm) ZrO2 ceramic microspheres were prepared.The factors affecting the size of ZrO2 microspheres were analyzed.The results show that under the same conditions,the larger the flow rate or viscosity of the silicone oil,the smaller the size of the ZrO2 microspheres.The larger the flow rate of the broth or the larger the throat size of the capillary microfluidic device,the larger the size of the ZrO2 microspheres;the CV value of the ZrO2 ceramic microspheres is less than 5% by image recognition,indicating that the ZrO2 ceramic microspheres prepared by the method are uniform in size and monodispersed;the ZrO2 ceramic microspheres are dense and show a cubic phase by SEM and XRD.