超声酸处理对薄玻璃表面状态及强度的影响

Effect of Acid Treatment on Surface Morphology and Strength of Glass at Ultrasonic Wave

以HF、H2SO4混合液作为腐蚀液,在超声波作用下对薄玻璃进行了表面处理。实验中采用金相显微镜观察了腐蚀前后的表面状态,测厚指示表测量了腐蚀厚度,材料表面与界面性能实验仪研究了腐蚀前后的抗折强度。在超声波频率40 kHz,功率125 W条件下,通过正交设计实验对HF、H2SO4加入量、侵蚀温度、侵蚀时间进行了优化,结果表明HF浓度20%,H2SO4浓度20%,侵蚀时间15 min,侵蚀温度25℃为最佳工艺条件,此条件下玻璃的抗折强度从处理前的65 MPa增加到243 MPa,侵蚀厚度大约40μm,显微观察表明划痕、坑点等缺陷明显减弱,甚至消失。

The thin glass was polished used acid mixing solution of HF and H2SO4 at ultrasonic wave.In experiment,the surface morphologies after and before acid corrosion were observed with metallographic microscope.The thickness for acid etching was determined by measure thickness instrument.The flexural strength after and before acid corrosion was investigated via material surface and interface performance tester.The experimental conditions,such as the adding content of HF and H2SO4,the temperature and time during acid corrosion,were optimized via orthogonal design test under ultrasonic wave（f=40 kHz,P=125 W）.The results indicate that suitable conditions were 20% for HF,20% for H2SO4,15 min for acid corrosion time,25 ℃ for acid corrosion temperature.The flexural strength of glass increases from 65 MPa to 243 MPa.The thickness for acid etching was about 40 μm.The microscopic pictures show that the surface defects of glass,such as scratch,pit and so on,obviously weakened,or disappeared.