Papers by Keyword: Preparation Technology

Abstract: The technology of quartz pore gradient ceramics were researched with the low grade quartz sand along the Yangtze River via the vacuum sintering method in this paper, which lay technology foundation for exploiting new heat insulating materials. The research results are shown as following, when the ratio of water to raw materials is 1, the shape and pore distribution of pore gradient ceramics is better. The porosity are first increased and then decreased with an increasing the sintering temperature. The suitable sintering temperature is decided at 1100°Cæ, the density is 1.343g/cm³, the porosity is 48.7%, the compressive strength is 7.071MPa, and the pore gradient structure is homogeneous transition zone.

Abstract: For its light quality, good thermal conductivity, and excellent electricity shielding performance, Magnesium alloy has been used in industry, agricultural and so on, for rare earth elements can improve the mechanical performance of magnesium alloy, the study of powder metallurgy is influence by rare earth magnesium is few at present. so, in this paper, by mixing powder metallurgy method the Y89 element was added in Mg17Al12 magnesium alloy, the influence of Y89 on microstructure, hardness and compression performance of Mg17Al12 magnesium alloy was studied, The experimental results show that when amount of Y89’s addition, the mechanical performance is more then and when is 1.22%, its mechanical performance is best, hardness is 66.7 HV, compressive strength is 113.6 MPa,increased respectively by 19.7% and 29.3% compared the Mg17Al12 magnesium alloy substrate, and the grain refinement effect of Mg17Al12 magnesium alloy is the best at this time.

Abstract: As a new kind of manufacturing technology developing rapidly, Material Increasing Manufacturing, scilicet 3D printing technology is that the popularity of various fields. In this paper, under the background of the desktop 3D printing gradually enter the family. To solve the printing material problem scilicet 3D printing technology development bottleneck, come up with a bamboo-plastic composite made of Bamboo powder and poly lactic acid (PLA), can be used on desktop 3D printing. Due to bamboo resources is abundant, low cost, and also have the advantages of friendly of environment, have a good potential for development. In this paper, the right formula is used in the study on preparation of materials, through the material blending; extrusion process to produce the 3D printing wire can meet the requirements. Through further studies on the ratio of bamboo and plastic, the amount of additives added, extrusion processing temperature and material situation, optimizing the ratio of bamboo and plastic, the amount of Additives, adjust the extrusion temperature in the formulation. Tests showed that through the improved technology, wires have further enhanced performance, continuous printing more than 300 meters, the printing effect is smooth, jam does not appear, and the molded parts have good quality.

Abstract: The paper made a research on the process of a biodegradable buffer packaging material prepared mainly by corn straw fiber and starch. By choosing the appropriate adhesive, through a molding process, a buffer packaging material with good performance can be obtained. Factors affecting the properties of the PLA/corn straw Fiber Foamed Material (hereinafter referred to as PFFM) are mainly adhesives, starch content, agent quantity, auxiliary material and foaming temperature. A degradable foamed packing material was prepared.

Abstract: In this paper, the preparation technology and improved the mixture ratio design method of foam concrete with lightweight tailings have been studied. Based on the review, the following research needs have been identified: (i) to calculate the amount of lightweight tailings by the binder materials content, (ii) to calculate additional water by the water absorption of lightweight tailings saturated surface dry condition, (iii) to calculate foam stabilizer content by the weight of foaming agent. Foam should be measured by volume. By testing the wet density of foam concrete paste to accurately control the amount of foam. The foam concrete mixed with a certain amount of lightweight tailings not only can significantly reduce the content of cement, reduce cost, but also can improve the performance of foam concrete.

Abstract: High temperature and high pressure (HTHP) and chemical vapor deposition (CVD) are two important methods of preparing diamond. This article briefly introduced the kinds of diamond cutting tool materials and the two technologies of synthesizing diamond. And in the end, the developing trends of diamond cutting tool materials and the preparation technologies were forecasted.

Abstract: According to the shortcomings of the traditional free abrasive chemical mechanical polishing (CMP), in recent years, the fixed abrasive chemical mechanical polishing (FA-CMP) technology is proposed. It is a new planarization technology developed on the basis of the traditional CMP. Pad is an important and dispensable part in FA-CMP. The cost and quality of FA-CMP pad are determined by the preparation technology. In order to study the FA-CMP pad of the low cost and high quality, in this paper, by reading a lot of literature, 5 kinds of preparation technology of FA-CMP pad are analyzed. Study results will provide some reference for further designing and manufacturing the FA-CMP pad.

Abstract: 6.5wt%Si electrical steel has a wide application in electrical and electronic devices based on its excellent soft magnetic properties. However, it is very hard to prepare thin sheets of this material by conventional rolling methods, because of its obvious brittleness at room temperature. In order to avoid brittleness at high silicon content, different technological development of preparations of 6.5wt%Si electrical steel are illustrated in this work.

Abstract: the solid thin film lithium-ion battery integrated on chip was designed and analyzed based on solid lithium-ion battery structure, materials and microelectronics processing technology. The design model of the solid lithium-ion battery consists of Li negative electrode, Li₃PO₄ electrolyte and LiCoO₂ positive electrode. The preparation process of the solid lithium-ion battery integrated on chip was researched, and the process consists of seven main steps. In addition, the characteristics of the design model of the solid lithium-ion battery were analyzed using COMSOL. The results show that the solid lithium-ion battery has small internal resistance and large discharge capacity. The discharge capacity of the solid lithium-ion battery under the discharge current of 25C reaches 75% of the discharge current of 1C.

Abstract: The homogeneous was used to optimize the processing technology of Aspergillus oryzae seed koji. The results show that the culture time is the most significant factor and the sequence of the residual factors are the square of culture time, the interaction between temperature and the time, the interaction of time and wood ash addition, the square of wood ash addition and the inoculation quantity. The results reveal that the optimized culture conditions are proved to be that the incubation time is 9 days, the inoculation quantity is 0.1×10⁷/g, the dosage of wood ash is 1.267% and the culture temperature is 40°C. Under this condition, the prospective spore number of seed koji has reached to 1.89×10⁹ /g.