Preparation method of NbSe2/CeNbO4 nanocomposite

Abstract

The invention discloses a preparation method of a NbSe2 / CeNbO4 nanocomposite, which comprises the steps of material preparation, ball milling, drying, and sintering. The prepared NbSe2 / CeNbO4 has mixed morphology of nanometer sheets and nanometer particle balls, wherein the nanometer sheets are NbSe2 hexagonal sheets, and the nanometer particle balls are CeNbO4 microparticles; the nanometer sheets have a radial dimension of 3 microns, and have a thickness of 200 nm; the CeNbO4 nanometer particle balls are uniform in size, and have a particle size of about 80 nm. The method of the invention adopts simple solid phase reaction in situ synthesis to obtain the NbSe2 / CeNbO4 nanometer lubrication composite material with special morphology and different sizes. The preparation method of the NbSe2 / CeNbO4 nanocomposite of the invention is simple and practical, mild in reaction conditions, green and pollution-free in process, low in cost, safe and easily available in reagents. When the composite material is used as a lubricating oil additive, the composite material has excellent stability and dispersibility, can effectively improve the friction performance of lubricating oil, and has very good practicality and economical efficiency.

Description

Technical field [0001] The invention relates to the technical field of nanocomposite materials, in particular to a kind of NbSe with higher lubricating properties 2 / CeNbO 4 Preparation method of nanocomposite materials. Background technique [0002] Layered structure transition metal sulfide selenide MX 2 (M=Mo, W, Nb, Ti, Ta; X=S, Se) has a crystal structure similar to graphite, the crystal layer and the layer are combined by weak van der Waals force, and the layer is combined by covalent bonds , Causing the layers to slip easily under the action of shearing force, so it has good lubricating properties, so it has been widely used and studied as a solid composite lubricating additive and lubricating oil additive; traditional solid lubricating materials such as MoS 2 And graphite exists in natural mineral deposits. At present, its research and application are the most, and its industrial application is the most mature. For other non-natural transition metal sulfide selenides, suc...

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Problems solved by technology

The friction and wear properties of rare earth metals were first studied at the Bell Telephone Research Institute of the United States and the Lewis Center of NASA. The results showed that compared with other metals of the same crystal, rare earth metals have small adhesion coefficients, low hardness, and lubricity at high temperatures; The research on rare earth elements in tribology is mainly reflected in the research on the tribological properties of rare earth metals, rare earth inorganic compounds and rare earth complexes as lubricating oil, grease and solid lubricating material additives; CeNbO 4 It is a rare earth inorganic compound with a monoclinic brown yttrium niobium structure, and it is a rare earth ceramic material, CeNbO 4 There are many studies in the fields of battery materials, crystal structure phase transition research, etc., but no research has been reported in the field of tribology; ceramic materials have the advantages of high hardness, high strength, low density, high temperature resistance, and stable chemical properties, so It is also widely used in the field of friction, but a single ceramic material has a high friction coefficient in tribology due to its high hardness; the reasonable combination of multiple solid lubricants has better performance than a single lubricant, which is called Lubricant Synergy

such as nano-CeO 2 and nano-SiO 2 And it shows a good synergistic lubricating effect when used as a lubricating oil additive with nano-Cu composite particles; so we propose to prepare a NbSe 2 / CeNbO 4 Nanocomposite materials, there is no report of this novel nanocomposite material at home and abroad at present

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