Ultrafine nickel powder has been used as catalysts,magnetic materials,sintered activators,electroconductive sizing materials,hard metal adhesives,etc.Because of its special roles in the fields of electricity,magnetism,etc,research on ultrafine nickel powder is a topic of general interest in the new field of functional material at present.In this paper …
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To simplify the preparation process and prepare ultrafine WC powder, a certain amount of As element was added to the ammonium paratungstate precursor.…
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Ultrafine tungsten carbide (WC) powder refers to WC powders with a particle size between 100 and 500 nm. Researchers have improved the comprehensive properti...
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A rapid route of synthesizing WC–Co composite powder by in situ reduction and carbonization reactions of metal oxides and carbon was proposed. The effects of a series of processing parameters on the preparation of the pure-phase and ultrafine composite powder were studied systemically.
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Ultrafine copper powder has the excellent characteristics of both copper and ultrafine particles and has been widely used in industry. Different fields have different …
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A powder and mineralizer technology, which is applied in the field of preparing ultrafine α-Al2O3 powder, can solve the problems of large alumina particles and low alkali content, and achieve high-quality mass production and low-cost effects.
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Ultrafine fish bone powder (UFBP) from silver carp (Hypophthalmichthys moli trix) was prepared using dry media milling. The characteristics of UFBP were investigated by a laser particle size analyz...
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In this study, eggshell-derived CaCO3 ultrafine powder was prepared from waste eggshell with the method of omnidirectional planetary ball mill. The particle size distribution was measured by laser particle size analyzer. Then, the parameters of grinding kinetic equation of eggshell powder …
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Nickel ultrafine powder and crystalline film have been prepared by chemical reduction of aqueous NiSO4 with hydrazine at different conditions. Experim…
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Ultrafine copper powder with uniform particle size and good dispersion was prepared in aqueous solution using copper oxide as precursor, ascorbic acid as reducing agent, …
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The preparation of ultrafine silver powder with chemical reduction method was investigated. Ascorbic acid was employed as reducing agent. Reaction of …
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Summary The preparation of ultrafine powder involves many unit processes, and the significant economic and aca- demic value will prompt scientists to do further …
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A modified oxalate method that can be used to prepare ultrafine barium titanate powder is proposed .By this method, the Ti 4+ ions in the solution reacts with C 2O 4 2- firstly to form complex ions, TiO(C 2O 4 2- ) 2-, and the complex ions reacts with Ba 2+ forming the precursor of barium titanate, BaTiO(C 2O 4) 2.4H 2O. Ultrafine barium titanate powder …
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Semantic Scholar extracted view of "Preparation of ultrafine nickel powder by polyol method and its oxidation product" by Z. Ying et al.
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Ultrafine powders are the hot spot of material science to be studied in 21st century and have commendable prospects of applications as developments of preparative …
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The ultrafine silver powder was characterized by SEM and XRD. And a PVA dispersive mechanism for preparing highly dispersive ultrafine silver powder, proved by the ultraviolet spectra, is that PVA absorbed on the surface of silver particles by coordination bond preventing the silver particles from diffusion and aggregation.
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Ultrafine silver powder has been widely used in microelectronics [1], optical devices [2], and chemical catalysis [3] due to its unique electrical, optical, catalytic, and thermal properties.
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Preparation of ultrafine Sm 2 Fe 17 N 3 magnetic powders without ball milling. Author links open overlay panel Jing Wang a, Wei Cai a, Jingwu Zheng a, ... However, certain challenges are associated with obtaining a high-quality Sm 2 Fe 17 N 3 magnetic powder via conventional preparation methods, ...
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It can be considered from the method of improving the preparation of powder, such as wet chemical method. Or improving the ball milling process to prepare ultrafine crystal powder with less impurities. In addition, improving the sintering property can also improve the performance of the sample. In addition, a good ball milling process …
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The synthesis of ultrafine tungsten carbide powder from WCl_6–C_2H_2-H_2 mixtures was investigated. Under most experimental conditions, a mixture of α–WC and β–W_2C was produced. The specific surface area and morphology of the product prepared under various reaction conditions were determined. The product particle size increased with …
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The Taguchi robust design method is implemented for the optimization of experimental conditions in the synthesis of high-purity ultrafine copper powder (HUCP) in mass-production by the chemical reduction method. A reducing agent, reaction temperature, reducing agent weight, and a stirring rate are chosen as the major …
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Another option for advancement of PM technology is exploitation of the extreme bimodality of nano/micro powder mixtures. The present study describes bimodal powder preparation involving dispersion of nickel nanoparticles onto the surface of a micro powder to facilitate the compaction ability and sinterability of the Ni micro powder.
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Ultrafine copper powder has the advantages of low sintering temperature, small particle size, good electrical conductivity and low cost, which can be used to prepare conductive ink.
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Ultrafine Mo powder with a high purity was prepared by a two-step process. ... Therefore, how to prepare ultrafine molybdenum dioxide becomes the most critical issue for the preparation of ultrafine-grained Mo alloys. In literature, many physical and chemical methods for the synthesis of ultrafine molybdenum powder have been …
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Ultrafine powder of single-phase monoclinic ZrO2 was prepared by hydrothermal treatments of amorphous hydrated zirconia with 8 wt% KF solution under 100 MPa at 200° to 500°C for 24 h. The process yielded well-crystallized particles 16 nm and 22 nm in size...
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A novel process was developed to produce spherical copper powder for multilayer ceramic capacitors (MLCC). Spherical ultrafine cuprous oxide (Cu2O) powder was prepared by glucose reduction of Cu(OH)2. The Cu2O particles were coated by Mg(OH)2 and reduced to metallic copper particles. At last, the copper particles were …
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The Taguchi robust design method is implemented for the optimization of experimental conditions in the synthesis of high-purity ultrafine copper powder (HUCP) …
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Preparation of ultrafine spherical AlOOH and Al 2 O 3 powders by aqueous precipitation method with mixed surfactants. Author links open overlay panel Jian Kong, ... It was reported that ultrafine spherical alumina powder is often applied in abrasive material for fine polishing of electronic products [3] ...
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This article investigated the preparation of ultrafine W powder by fluidized bed hydrogen reduction, and the apparent activation energy was determined…
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Numerous studies have shown that supercritical fluid preparation of ultrafine powders can overcome the above shortcomings, and thus has become a research hotspot in the past decade. Progress To date, the preparation of ultrafine powders using supercritical CO 2 has evolved into various processes. The initial method, invented by Matson Dean in ...
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Ultrafine α-Al2O3 particles with a high purity of 99.997% and an average size of 300–400nm were successfully prepared via hydrothermal and jet-milling…
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This article investigated the preparation of ultrafine W powder by fluidized bed hydrogen reduction, and the apparent activation energy was determined for various reduction stages by using temperature programmed reduction with hydrogen.
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