低温常压等离子体处理对二硅酸锂玻璃陶瓷表面性能的影响

Effects of non-thermal atmospheric plasma jet on surface characters of lithium disilicate glass ceramics

目的 :研究低温常压等离子体射流(以下简称等离子体)处理对二硅酸锂玻璃陶瓷(以下简称玻璃陶瓷)表面性能的影响。方法:将玻璃陶瓷试件随机分为7组(n=9),分别为空白对照组、氢氟酸酸蚀组、等离子体处理组(10 s、20 s、30 s、40 s、60 s)。处理后,采用水接触角测量、X射线衍射分析、原子力显微镜、X射线光电子能谱对试件表面性能进行分析。结果:与空白对照组相比,氢氟酸酸蚀与等离子体处理后的试件表面水接触角明显下降,表面氧元素原子量百分比明显增加、氧/碳值升高,但表面晶相结构无明显改变;等离子体处理前后试件表面微观形貌无明显改变。结论:低温常压等离子体射流处理可提高玻璃陶瓷表面的亲水性,增加玻璃陶瓷表面氧元素原子含量,并且不会明显改变玻璃陶瓷表面晶相结构及表面形貌。

Objective:To study the effect of non-thermal atmospheric plasma jet(NTAP) on the surface characters of lithium disilicate glass ceramics(LDC). Methods:Prepared LDC specimens were randomly divided into 7 groups(n =9):the blank control group,the HF-etching group and the NTAP-treating groups with different treatment time(10 s,20 s,30 s,40 s and 60 s). After different treatments,surface characters of specimens were analyzed by water contact angle test,X-ray diffraction analysis,atomic force microscope and X-ray photoelectron spectroscopy analysis. Results :Compared with the control group,specimens after HF-etching or NTAP treating had some changes :the water contact angle values was dropped;the percent of oxygen atomic weight was significantly increased on the LDC surfaces;the oxygen/carbon ratio was increased,without obvious changes of phase transformation and without significant morphological change on the NTAP treated surfaces. Conclusion:NTAP treatment can increase the hydrophilicity of LDC surfaces and increase the oxygen atomic weight on the surface,without phase transformation or significant morphology change of LDC surfaces.