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Study on Electrolytic Capacitor Anode of Titanium Suboxide

Author: SongWenJie
Tutor: ZhongZuo
School: Central South University
Course: Iron and steel metallurgy
Keywords: Electrolytic capacitor Cheap titanium oxide Titanium monoxide Electrical properties An anodic oxide film
CLC: TM535
Type: Master's thesis
Year: 2005
Downloads: 140
Quote: 1
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Abstract


Electrolytic capacitors widely used, the market is enormous, tens of billions of annual demand. Due to different factors affect the performance, resource, price, electrolytic capacitor anode material by aluminum - tantalum - niobium - cheap niobium oxide in constantly upgrading. The research and development of new type of electrolytic capacitor anode material has a very important significance. Compared with other types of electrolytic capacitor anode, titanium resource-rich, low prices, but the titanium anode oxide film formation difficult. The advantage of the research of low-cost titanium oxide (TiO) electrolytic capacitor anode hematocrit high leakage current is small, resource-rich, low prices. For the first time using low-cost titanium oxide electrolytic capacitor anode material of Ti (the TiH 2 ) and TiO 2 solid - solid reactions, preparation of low-cost titanium oxide (TiO) powders, sintered electrolytic capacitor process: powder compacting molding → the anode sintered → anodizing process to study the variation of a single factor test and orthogonal experiment and variance analysis method to optimize low-cost titanium oxide electrolytic capacitor anode manufacture The process conditions detailed study, the cheap titanium oxide capacitor anode hematocrit prepared using the technology for 40000 ~ 120000μF · V · g -1 , leakage current (K value) of 0.1 to 0.005 'μA · μF -1 · V -1 . Ti (TiH 2 ) and TiO 2 solid - solid reaction prepared the cheap titanium oxide process with product from pollution, the oxygen content of the system is easy to control advantages. Kinetic analysis showed that the diffusion of O in the different physical phase is Ti (TiH 2 ) and TiO 2 the reaction speed of the control step, the grinding and mixing the high-temperature calcination favor the reaction speeds. Use of the theory of quantum chemistry, structural chemistry theory, in-depth analysis of the stability and conductivity mechanism of TiO. Ti outer electron structure, the ionization potential orbit splitting characteristics, and TiO, TiO 2 disproportionation reaction free energy calculation results prove TiO higher stability; quantum chemistry with theoretical analysis shows that, TiO has good conductive capacity, to meet the requirements of the capacitor anode material on the conductive ability. Through experiments the oxygen content of the low-valent titanium oxide, powder size, doping relationship between NbO with its electrical properties were investigated. The results show that the oxygen content of a low-valent titanium oxide, powder particle size has a great influence on the electrical properties of doped NbO to a large extent to improve its electrical properties. Forming a liquid selection study shows that low-valent titanium oxide time - voltage curve in most formation liquid was semi-parabolic best cheap titanium oxide is formed, the use of ammonium pentaborate or boric acid mixed solution of ammonium pentaborate. With the formation of the voltage change, low-cost titanium oxide empowerment anode showing a different bright interference color (color). Using SEM cheap titanium oxide powder sintering, enabling process changes carried out a detailed study of the morphology. Spectroscopy and X-ray diffraction analysis showed that the low-cost titanium oxide anode oxide film for The amorphous TiO 2 . Using cyclic voltammetry and AC impedance method, for the first time in 5% of the the cheap titanium oxide electrode boric acid

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CLC: > Industrial Technology > Electrotechnical > Electrical > Capacitor > Electrolytic capacitor
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