Papers by Keyword: Yield Rate

Abstract: With the means of thermodynamic calculation and alloy smelting, the reaction of Mg-Y-Mishmetal-Zr melt in the process of smelting is studied and the relevant thermodynamic data are obtained. The results show that when rare earth (RE) reacts with MgO to seize the oxygen, Y has the strongest capacity while La has the weakest capacity, and Y is most likely to be burned due to preventing melt oxidation. In the reaction of between RE and covering flux, relative to other elements, Ce is less likely to be burned while Y and La are more likely to be burned. The actual smelting result is consistent with the calculation.

Abstract: This study deals with the synthesis of phenylazo-N,N-diphenylpropanediamide which is a kind of excellent pigment. During the preparation, intermediate product, N,N-diphenylpropanediamide is first synthesized through the substitution reaction of malonic acid diethyl ester and substituted aniline. Then, final product, phenylazo-N,N-diphenylpropanediamide can be obtained by coupling reaction of N,N-diphenylpropanediamide and phenyl substituted diazonium salt. The final product has been analyzed by UV, MS and HNMR, respectively, to determine the composition and structure. In addition, the effects of solvents, coupling catalyst and pH on yield rate have also been investigated.

Abstract: Long route and high inclusion content are two common problems existing in the present process for magnesium alloys. To solve these problems, a new process technology, in which the crystalline magnesium is used as the raw material, is developed. The process is melting flux→ adding raw materials in batches → stirring→ holding→ pouring (MASHP). The mechanisms of protection and purification mechanisms are also analyzed. The results show that the MASHP process has high protection and purification effects on magnesium alloys. By the in-batches addition mode of raw materials, no oxidation and evaporation loss of magnesium produce during heating and melting, and the inclusions that self-contained in the crystalline magnesium and that produced by oxidation during heating and melting can be minimized. High quality magnesium alloys can be produced by the new process.

Abstract: To improve the yield rate of steel plates, a method of slab size design is proposed based on maximum yield rate of plates. It includes material transformations algorithm and optimization of slab selection. Many factors are considered in the model covering the equipment capacity, spread rate, compression rate, burning loss and cutting loss. Initially, all possible types of slabs are obtained through material transformations algorithm after the order input. This allows the eventual determination of the slabs of the largest yield rate through the optimization of slab selection. The experiments prove that the model can reduce a number of materials and lessen the pressure of the inventory. An effective increase of plate yield can be expected to improve the economic efficiency of enterprise.

Abstract: The low yield rate of the transparent conducting oxide (TCO) is easily existent through the processes of semiconductor production. A nanotechnology system of the recycling process for removing the TCO-layer from displays’ color filter surface of computer display is presented. By establishing a recycling process for the ultra-precise removal of the thin film nanostructure, the semiconductor optoelectronic industry can effectively reclaim defective products, reducing both production costs and pollution for the technical application. In the current experiment, the major interest is the design mechanism features of the removal process for a thin layer of TCO and an effective design dumbbell-tool. For the recycling processes, a small diameter of the positive-electrode, a small gap-width between the negative-electrode and the positive-electrode corresponds to a higher removal rate for the TCO-layer. A high rotational speed of the dumbbell-tool, or a high flow velocity of the electrolyte increases the dreg discharge mobility and improves the removal effect. A higher working temperature or a higher concentration of the electrolyte corresponds to a higher removal rate for the TCO-layer. An enough electric power corresponds with a higher feed rate of the displays’ color filter produces a fast removal rate and reduces the production costs. An effective design of the system mechanism and the machining tool in the electroremoval processes requires quite a short time to make the TCO-layer remove easily and cleanly.