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The research of the high aspect ratio of a micron size round pinWang, Yong-siang 09 September 2008 (has links)
In this study, an electrolytic micro-machining tester is employed to investigate the effects of supply voltage and initial machining position on the geometry of the tungsten needle using the single-point and the reciprocating methods. The tungsten needle to be electrolyzed is dipped in an aqueous electrolyte of 2wt % sodium hydroxide as the anode, and the stainless steel needle with a diameter of 100 £gm as the cathode, and the electrode gap is set to be 10 £gm.
Experimental results show that it is difficult to control the diameter of the tungsten needle because the reduction rate of its diameter is quite fast and the bubbles are generated violently to cause the breakage of the tungsten needle at the higher supply voltage. At the lower supply voltage, the tungsten needle can be machined to a finer scale, but it takes a long machining time.
Under the single-point machining condition, it can be used to manufacture a short, uniform, and smooth tungsten needle with the diameter of 9 £gm at the supply voltage of 12V and the initial machining position of 75 £gm. Under the reciprocating machining condition, a long uniform micro-cylinder tungsten needle can be manufactured, but its surface becomes rough slightly at the supply voltage of 4V and the initial machining position in the range between -50 and 0 £gm. A tungsten needle with the aspect ratio of 30 and the diameter of 9 £gm can be manufactured using the following process: the machining time of 24 min at the supply voltage of 4V, and then the machining time of 28 min at the supply voltage of 2V.
Key words¡Gtungsten needle, sodium hydroxide
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The diffusional properties of sodium hydroxideFary, A. David 01 January 1966 (has links)
No description available.
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The effect of NaOH treatment and sucrose and urea supplementation on the nutritive value of oat straw as determined in vitro and in vivo.Adeleye, Isaac Omotosho Adewale. January 1969 (has links)
No description available.
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The mechanism and rate of extraction of silica from low grade siliceous iron ores by digestion in sodium hydroxide solutionsStone, Rodney Lowell, January 1964 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1964. / Typescript. Vita. Description based on print version record. Includes bibliographical references (leaves 116-117).
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Electrochemical studies of metals in fused sodium hydroxide /Theus, George John January 1972 (has links)
No description available.
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The effect of NaOH treatment and sucrose and urea supplementation on the nutritive value of oat straw as determined in vitro and in vivo.Adeleye, Isaac Omotosho Adewale January 1969 (has links)
No description available.
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Nucleophilicity of hydroxide, hydrosulfide, and anthrahydroquinone ions toward saturated and unsaturated carbon centers at high temperaturesReed, Gregg Arthur 11 June 1988 (has links)
No description available.
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The Kinetics of the reactions involved in the bleaching of eastern spruce groundwood with alkaline peroxideMartin, Darrell M. 01 June 1951 (has links)
see pdf
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Recovery of caustic soda from the mercerization processJones, Leonard Douglas 08 1900 (has links)
No description available.
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The heat of neutralization of sodium and potassium hydroxides with hydrochloric acid at high concentrationsBiermann, Wendell J., January 1950 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1950. / Typescript. Includes abstract and vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
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