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 gel process

摘要:

本文寻找到一种常温(25℃)下稳定15h不固化且较好成球的胶液配方,利用毛细管微流体装置辅助内凝胶工艺成功制备出小尺寸(<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：其它条件相同的条件下,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、单分散性好；通过SEM和XRD发现ZrO2陶瓷微球致密,呈立方相。

Abstract:

_{:In this paper, we find a broth formulation that is stable at room temperature for 15h and does not solidify and it is good for forming gel microspheres. And we use a capillary microfluidic device assisted internal gel process to prepare successfully small size (<120μm) ZrO2 ceramic microspheres. The factors affecting the size of ZrO2 microspheres are analyzed. The results show that under the same conditions, the larger the flow rate or the 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 microspheres are less than 5% by image recognition, indicating that the ZrO2 ceramic microspheres prepared by the method are uniform in size and monodisperse; the sintered microspheres are dense and showing a cubic phase by SEM and XRD.}