作为嵌入式电容器用电介质之一，低成本、易加工、高介电常数的 Al 粉/高分子复合材料有潜在的应用前景。为了降低这种材料的介电损耗，分别以空气和微量水为氧化剂，对 Al 粉进行二次钝化，并表征了钝化膜的结构和化学组成，测量了这种钝化 Al粉及其聚四氟乙烯(PTFE)复合材料的介电性能。结果表明：生成的数纳米厚的二次钝化膜覆盖在 Al粉自钝化膜上面，空气钝化膜以 Al2 O3为主，水钝化膜以 Al(OH)3为主；空气钝化缓慢，二次钝化膜薄，表面光滑，而水钝化较快，二次钝化膜厚，但结构疏松。与空气钝化相比，水钝化能够更好地设计钝化膜厚度，从而调控 Al粉/PTFE复合材料的介电性能。
As one of dielectric materials for embedded capacitors,Al powder/polymer composites have good appli-cation potentials due to low cost,easy processability and high dielectric constant.To lower the dielectric loss of these materials,the secondary passivation processes of Al flakes using air and tiny water respectively as the oxidants were studied.The structure and chemical composition of passivation films were characterized,and dielectric proper-ties were evaluated for the passivated Al flakes and their polytetrafluoroethylene (PTFE)composites.The results show that several-nanometer thick secondary passivated film forms outside the self-passivated film of Al flakes, mainly consisting of Al2 O3 and Al(OH)3 .The former contains main Al2 O3 ,and the latter contains main Al(OH)3 . Air passivation occurs very slowly,the resulting secondary passivated films are thin but smooth,in contrast,tiny-water passivation proceeds quickly;the resulting ones are thick but loose.Tiny-water passivation exhibits better ap-plicability in tailoring the thickness of passivated films than air passivation,so as to adj ust the dielectric properties of Al flakes/PTFE composites.
参考文献
| [1] | Anaram Shahravan;Tapan Desai;Themis Matsoukas.Passivation of Aluminum Nanoparticles by Plasma-Enhanced Chemical Vapor Deposition for Energetic Nanomaterials[J].ACS applied materials & interfaces,201410(10):7942-7947. |
| [2] | S.S. Razavi-Tousi;J.A. Szpunar.Effect of structural evolution of aluminum powder during ball milling on hydrogen generation in aluminum-water reaction[J].International journal of hydrogen energy,20132(2):795-806. |
| [3] | Xiani Huang;Tong Gao;Xiaole Pan;Dong Wei;Chunju Lv;Laishun Qin;Yuexiang Huang.A review: Feasibility of hydrogen generation from the reaction between aluminum and water for fuel cell applications[J].Journal of Power Sources,2013May 1(May 1):133-140. |
| [4] | Hongqi Nie;Mirko Schoenitz;Edward L. Dreizin.Calorimetric investigation of the aluminum-water reaction[J].International journal of hydrogen energy,201215(15):11035-11045. |
| [5] | Philip M;Karlsson;Alexandra Baeza;Anders E;C;Anders E.C. Palmqvist;Krister Holmberg.Surfactant Inhibition Of Aluminium Pigments For Waterborne Printing Inks[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,20088(8):2282-2287. |
| [6] | Mathieu Joubert;Maud Save;Stéphane Mornet;Fran?ois Lavaud;Virginie Pellerin;Fabrice Morvan;Jean-Fran?ois Tranchant;Etienne Duguet;Laurent Billon.Surface patterning of micron-sized aluminum flakes by seeded dispersion polymerization: Towards waterborne colored pigments by gold nanoparticles adsorption[J].Polymer: The International Journal for the Science and Technology of Polymers,20143(3):762-771. |
| [7] | Jianwen Xu;C. P. Wong.Low-loss percolative dielectric composite[J].Applied physics letters,20058(8):082907-1-082907-3-0. |
| [8] | Ye Zhang;Yao Wang;Yuan Deng;Mao Li;Jinbo Bai.High dielectric constant and low loss in polymer composites filled by self-passivated zinc particles[J].Materials Letters,2012:9-11. |
| [9] | Yongcun Zhou;Hong Wang.An Al@Al_2O_3@SiO_2/polyimide composite with multilayer coating structure fillers based on self-passivated aluminum cores[J].Applied physics letters,201313(13):132901-1-132901-4. |
| [10] | 胡娜;薛丽红;顾健;李和平;严有为.磨球级配对MA-SPS原位合成Al13Fe4/Al复合材料的组织结构及力学性能的优化[J].金属学报,2015(2):216-222. |
| [11] | Zhi-Min Dang;Jin-Kai Yuan;Jun-Wei Zha;Tao Zhou;Sheng-Tao Li;Guo-Hua Hu.Fundamentals, processes and applications of high-permittivity polymer-matrix composites[J].Progress in materials science,20124(4):660-723. |
| [12] | Mengna Feng;Xu Huang;Hailong Tang;Xiaobo Liu.Effects of surface modification on interfacial and rheological properties of CCTO/PEN composite films[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,2014:556-564. |
| [13] | Yang Shen;Yuhan Guan;Yuhan Hu;Yuechuan Lei;Yu Song;Yuanhua Lin;Ce-Wen Nan.Dielectric behavior of graphene/BaTiO_3/polyvinylidene fluoride nanocomposite under high electric field[J].Applied physics letters,20137(7):072906-1-072906-4. |
| [14] | van den Brand J.;Sloof WG.;Terryn H.;de Wit JHW..Correlation between hydroxyl fraction and O/Al atomic ratio as determined from XPS spectra of aluminium oxide layers[J].Surface and Interface Analysis: SIA: An International Journal Devoted to the Development and Application of Techniques for the Analysis of Surfaces, Interfaces and Thin Films,20041(1):81-88. |
| [15] | Na Cai;Qianqian Liu;Xiao Tong;Guangwen Zhou.X-ray Photoelectron Spectroscopy Study of the Passivation of NiAl(100) by Water Vapor[J].Langmuir: The ACS Journal of Surfaces and Colloids,20143(3):774-783. |
| [16] | Lijun Li;Pihui Pi;Xiufang Wen;Jiang Cheng;Zhuoru Yang.Optimization of sol-gel coatings on the surface of aluminum pigments for corrosion protection[J].Corrosion Science: The Journal on Environmental Degradation of Materials and its Control,20083(3):795-803. |
| [17] | 高鑫欣;程辉;张邦文.片状锌粉的可控钝化及电性能研究[J].内蒙古科技大学学报,2014(1):19-23. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%