阅读说明：本技术 一种无铜纳米陶瓷刹车片 (Copper-free nano ceramic brake pad ) 是由 田式国 金鑫 许崇海 王伟平 王飞 王向东 王德军 陈照强 肖光春 衣明东 于 2020-06-08 设计创作，主要内容包括：本发明提供一种无铜纳米陶瓷刹车片,其中所述的刹车片组分的重量百分比为：酚醛树脂10%、矿物纤维17%、氧化铁6%、石墨10%、硫酸钡16%、芳纶纤维4%、钛酸钾20%、胶粉5%及纳米二氧化硅包覆六方氮化硼12%；优点为：本发明摩擦系数稳定,产品磨耗小,使用过程中制动舒适,无噪音产生,使用寿命达7万公里以上。(The invention provides a copper-free nano ceramic brake pad, which comprises the following components in percentage by weight: 10% of phenolic resin, 17% of mineral fiber, 6% of iron oxide, 10% of graphite, 16% of barium sulfate, 4% of aramid fiber, 20% of potassium titanate, 5% of rubber powder and 12% of nano silicon dioxide coated hexagonal boron nitride; has the advantages that: the invention has stable friction coefficient, small product abrasion, comfortable braking in the using process, no noise and long service life of more than 7 kilometres.)

1. A copper-free nano ceramic brake pad comprises phenolic resin, mineral fiber, iron oxide, graphite, barium sulfate, aramid fiber, potassium titanate, rubber powder and nano silicon dioxide coated hexagonal boron nitride, and is characterized in that:

the brake pad comprises the following components in percentage by weight:

10 percent of phenolic resin

Mineral fiber 17%

6 percent of ferric oxide

10 percent of graphite

Barium sulfate 16%

Aramid fiber 4%

20 percent of potassium titanate

Rubber powder 5%

And 12% of hexagonal boron nitride coated by nano silicon dioxide.

2. The copper-free nano-ceramic brake pad of claim 1, wherein: the hexagonal boron nitride coated by the nano silicon dioxide is spherical.

Technical Field

The invention relates to the field of automobile industry, in particular to a copper-free nano ceramic brake pad.

Background

The brake pad serving as a key part of an automobile is the most popular brake pad with a ceramic organic formula at present, and the material has the characteristics of stable friction, no pollution, small density, good comfort, long service life and the like, but the formula design contains 5-15% of copper. Heavy metals contained in copper are found to seriously pollute water in the United states in 2015, and the gradual use limitation and even prohibition of copper in the friction material of the brake pad are proposed at first, wherein the copper content is required to be less than 5% after 2021 years, and the copper content is required to be less than 0.5% after 2025 years. Copper is used as one of key raw materials in the organic ceramic formula, has important functions of heat conduction, stable friction coefficient, formation of a transfer film, reduction of abrasion and the like, and no material can directly replace copper in the original formula and keep the performance unchanged. New materials and new processes need to be introduced to solve the contradiction between the market and the current situation.

Disclosure of Invention

The invention aims to solve the defects of the prior art and provide a copper-free nano ceramic brake pad.

The new technical scheme of the invention is as follows: a copper-free nano ceramic brake pad comprises phenolic resin, mineral fiber, iron oxide, graphite, barium sulfate, aramid fiber, potassium titanate, rubber powder and nano silicon dioxide coated hexagonal boron nitride, and the brake pad comprises the following components in percentage by weight:

the hexagonal boron nitride coated by the nano silicon dioxide is spherical.

The invention has the beneficial effects that: the invention has stable friction coefficient, small product abrasion, comfortable braking in the using process, no noise and long service life of more than 7 kilometres.

Drawings

FIG. 1 is a process flow diagram of the present invention.

Detailed Description

The invention will be further described with reference to the accompanying drawings.

A copper-free nano ceramic brake pad comprises phenolic resin, mineral fiber, iron oxide, graphite, barium sulfate, aramid fiber, potassium titanate, rubber powder and nano silicon dioxide coated hexagonal boron nitride, and the brake pad comprises the following components in percentage by weight:

the hexagonal boron nitride coated by the nano silicon dioxide is spherical.

A copper-free nano ceramic brake pad is characterized in that spherical nano silicon dioxide coated hexagonal boron nitride is introduced into a friction material to serve as a friction performance regulator, when braking is started, the surface layer nano silicon dioxide and lubricants such as graphite and the like act together to keep the friction coefficient stable, a transfer film is completed, the graphite gradually loses lubricity along with the rise of braking temperature, a coating layer is opened, and the hexagonal boron nitride is similar to a graphite structure to form a new transfer film on the surface to stabilize the friction coefficient.

Aiming at the problems in the prior art, two groups of formulas (formula A and formula B) are designed for experiments according to the invention content, and the experimental scheme and the experimental result are as follows: