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Characteristics of Twin-Fluid Micro-Atomizer with Internal Mixing Mechanisms
( Muh Rong Wang ),( K. H. Yang ),( J. S. Chiu ),( Deng Sang Lai ),( T. S. Leu ),( Sheng Chih Shen ) 한국액체미립화학회 2005 한국액체미립화학회 학술강연회 논문집 Vol.2005 No.-
The twin-fluid atomizer has three micro channels fabricated via MEMS bulk micro-machining processes, one for the liquid supply and two for introducing the atomization gas. The effects of the length scale of the micro-channels on the atomization performance are investigated. The orifice hydraulic diameter (dH) of the micro atomizer is 45μm. Malvern Insitec RT-Sizer is used to measure the particle size. Results show that the twin-fluid micro-atomizer with internal mixing mechanisms can produce fine spray with Sauter Mean Diameter of 5μm under the gas pressure of 5kg/cm2 and liquid flow rate of 0.1ml/min, a performance better than the micro atomizers reported in the literature. Flow visualization through a microscope shows that the micro-spray is unstable when the two impinging gas flows are staggered inside the atomizer. The micro-spray began to twist by these two impinging gas flows when the gas pressure goes up to 2 kg/cm2. The twisting angle and the cone angle of the spray remain constant when the gas pressure is more than 3 kg/cm2. Significant decrease in the particle size takes place when the gas pressure is more than 4kg/cm2. The atomization efficiency of the twin-fluid micro-atomizer with internal mixing mechanism is several times higher than other type of twin-fluid atomizers.
Novel transport materials for high-performance fluorescent and phosphorescent OLEDs
Bohm, E.,Anemian, R.,Busing, A.,Fortte, R.,Heil, H.,Kaiser, J.,Krober, J.,Leu, S.,Mujica-Fernaud, T.,Parham, A.,Pflumm, C.,Voges, F. The Korean Infomation Display Society 2011 Journal of information display Vol.12 No.3
To improve the performance of blue fluorescent and green phosphorescent organic light-emitting diode devices, Merck developed novel green phosphorescent host and electron-transporting materials. The newly developed electron-transporting material improves the external quantum efficiency of blue fluorescent devices up to 8.7%, with an excellent lifetime. In combination with the newly developed host materials, the efficiency of green phosphorescent devices can be improved by a factor of 1.7, and the lifetime by a factor of 7.
Novel transport materials for high-performance fluorescent and phosphorescent OLEDs
E. Böhm,R. Anemian,A. Büsing,R. Fortte,H. Heil,J. Kaiser,J. Kröber,S. Leu,T. Mujica-Fernaud,A. Parham,C. Pflumm,F. Voges 한국정보디스플레이학회 2011 Journal of information display Vol.12 No.3
To improve the performance of blue fluorescent and green phosphorescent organic light-emitting diode devices, Merck developed novel green phosphorescent host and electron-transporting materials. The newly developed electron-transporting material improves the external quantum efficiency of blue fluorescent devices up to 8.7%, with an excellent lifetime. In combination with the newly developed host materials, the efficiency of green phosphorescent devices can be improved by a factor of 1.7, and the lifetime by a factor of 7.