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Antiwear antifriction composite additive for lubricating oil (grease)

A technology of grease and composite powder, which is applied in the field of nano-rare earth oxide-coated ultrafine muscovite composite powder and its preparation, can solve problems such as unstable surface friction performance, achieve chemical reaction speed, increase surface area, The effect of increasing the diffusion speed

Inactive Publication Date: 2014-09-17
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Qian Linmao, Luo Jianbin, Wen Shizhu and Xiao Xudong used AFM / FFM to measure the microscopic friction properties of reference sample mica, and showed that the friction properties of mica samples are affected by many factors such as the length of cleavage time, humidity and the change of the test needle tip. influence, its surface friction performance is unstable

Method used

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  • Antiwear antifriction composite additive for lubricating oil (grease)
  • Antiwear antifriction composite additive for lubricating oil (grease)

Examples

Experimental program
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Effect test

Embodiment 1

[0030] In this embodiment, 800 mesh muscovite is used as raw material, the reaction system is cerium chloride, and the ligand is oxalic acid. The process flow is as follows figure 1 As shown, there are the following steps in sequence:

[0031] 1. Ingredients

[0032] Weigh 0.95mol muscovite, 0.05mol cerium chloride, 0.1mol oxalic acid

[0033] 2. Mixing

[0034] Mix the weighed muscovite, cerium chloride and oxalic acid until uniform;

[0035] 3. Preparation of precursors by ball milling chemical reaction at room temperature

[0036]The uniformly mixed muscovite, cerium chloride and oxalic acid are ball milled at room temperature and normal pressure, so that they react to form precursors under the mechanical shear force and impact force generated during the ball milling process. The speed of the ball mill is 300 rpm Minutes, ball milling for 60 minutes can completely react cerium chloride and oxalic acid to form the precursor cerium oxalate, which is evenly distributed on ...

Embodiment 2

[0046] In this embodiment, 800 mesh muscovite is used as raw material, the reaction system is lanthanum chloride, and the ligand is oxalic acid. The process flow is as follows figure 1 As shown, there are the following steps in sequence

[0047] 1. Ingredients

[0048] Weigh 0.98mol muscovite, 0.02mol lanthanum chloride, 0.06mol oxalic acid

[0049] 2. Mixing

[0050] Mix the weighed muscovite, lanthanum chloride and oxalic acid until uniform;

[0051] 3. Preparation of precursors by ball milling chemical reaction at room temperature

[0052] The uniformly mixed muscovite, lanthanum chloride and oxalic acid are ball milled at room temperature and normal pressure, so that they react to form precursors under the mechanical shear force and impact force generated during the ball milling process. The speed of the ball mill is 400 rpm. Minutes, 40 minutes of ball milling can make lanthanum chloride and oxalic acid completely react to form precursor lanthanum oxalate, which is ev...

Embodiment 3

[0062] In this embodiment, 800 mesh muscovite is used as raw material, the reaction system is cerium nitrate, and the ligand is ammonium bicarbonate. The process flow is as follows figure 1 As shown, there are the following steps in sequence

[0063] 1. Ingredients

[0064] Weigh 0.90mol muscovite, 0.10mol cerium nitrate, 0.6mol ammonium bicarbonate

[0065] 2. Mixing

[0066] Mix the weighed muscovite, cerium nitrate and ammonium bicarbonate until uniform;

[0067] 3. Preparation of precursors by ball milling chemical reaction at room temperature

[0068] The uniformly mixed muscovite, cerium nitrate and ammonium bicarbonate are ball milled at room temperature and normal pressure, so that they react to form precursors under the action of mechanical shear force and impact force generated during the ball milling process. The speed of the ball mill is 250 rpm / min, 80 minutes of ball milling can make cerium nitrate and ammonium bicarbonate completely react to form precursor ...

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Abstract

The invention discloses an antiwear antifriction composite powder for lubricating oil (grease) and a preparation method thereof and relates to a nano-rare earth oxide-cladding ultrafine muscovite composite powder for the fields of lubricating oil, lubricating grease and the like. the invention is characterized in that a muscovite powder, rare-earth salt and its ligand are used as raw materials; a solid-phase reaction system is crushed by shear force and impact force generated during the ball-milling process, specific surface area of reactants is increased, and reaction rate is raised so as to raise ratio of nucleation rate to growth rate; a fine and uniform precursor is prepared, and then washing, drying and control of thermal decomposition temperature and time are carried out so as to obtain the nano-rare earth oxide-cladding ultrafine muscovite composite powder with different particle sizes and cladding systems; and after undergoing surface modification, the nano-rare earth oxide-cladding ultrafine muscovite composite powder is added into base oil or lubricating grease at different proportions of (0.5%-3%). In four-ball friction, friction coefficient can be reduced, and friction-pair wear scar diameter is minimized.

Description

technical field [0001] The invention patent belongs to "anti-wear and anti-friction composite powder and its preparation technology", which relates to a nano-rare earth oxide-coated ultrafine muscovite composite powder and its preparation method that can be used in the fields of lubricating oil and grease. Background technique [0002] With the development of modern industry, mechanical equipment continues to develop in the direction of high speed, heavy load, integration, high precision, and long life. Friction and wear failure have become one of the technical bottlenecks restricting the safety, reliability, and service life of equipment. In order to reduce the wear of equipment mechanical parts and prolong the service life of equipment, countries all over the world are looking for lubricants or lubricating oil additives that can have anti-wear, friction reduction and repair functions at the same time, so that they have self-repair functions or pass through during the wear p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10M125/00C10N30/06
Inventor 朱达川王大吉王莉李华峰陈国需
Owner SICHUAN UNIV
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