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

摘要:

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。

Abstract:

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.