In automotive products, ceramic structural parts can be used to manufacture automotive engines, exhaust systems, braking systems and other components.

Advanced ceramic and metal materials, polymer materials and known as the "three solid materials", with excellent mechanical, sound, light, thermal, electrical, biological and other characteristics, in the automotive industry has important applications. For example, the silicon nitride ceramic substrate promotes the acceleration of the third generation of semiconductors, and the application of silicon nitride ceramic bearings directly breaks through the limitations of durability, high speed, _{and electrical corrosion.}

Engine

Ceramic materials have the advantages of heat resistance, wear resistance, corrosion resistance, low density, strong heat insulation, ceramic materials used in the preparation of ceramic insulation engine, will well prevent the loss of internal heat energy of the cylinder. Although the density of ceramic is not as low as aluminum, it is much lower than steel, and the lower density means that the engine can reduce the weight, combined with the simplified weight of the cooling system, the weight of the ceramic engine can be made lighter than the metal engine. The main ceramic parts are as follows.

1. Engine heart

In order to improve the thermal efficiency of the engine and save energy, the ceramic insulating engine core can be made with the characteristics of heat resistance, wear resistance, corrosion resistance, high elastic modulus (low coefficient of expansion), low density, good heat insulation, etc., which can prevent the heat energy loss in the cylinder, simplify the overall structure of the engine and reduce the weight of the engine.

2. Piston ring
    The piston ring is a device that prevents combustion chamber gas from leaking into the crankcase. Traditional piston rings are usually made of cast iron or steel materials, but due to the high temperature and high-speed rotation environment, these materials are prone to wear and deformation problems. Therefore, some automobile manufacturers have begun to use high-performance ceramic materials to manufacture piston rings to improve their wear and high temperature resistance.

3, ceramic cylinder liner

    The ceramic cylinder liner can be divided into the following forms: the first is that the inner surface of the cylinder liner is covered by ceramic materials, and the Komatsu engine is a typical example; The second is to use ceramic materials only when preparing the upper ring of the cylinder liner; The third is the composite preparation of metal and ceramic materials, so that an all-ceramic cylinder liner is produced.

4, ceramic valve mechanism
    By using the characteristics of low density, heat resistance and wear resistance of ceramic materials, the valve, valve seat, tappet, valve spring and rocker arm are made of ceramic materials, which can reduce the deformation of the valve seat and the bounce of the seat, reduce noise and vibration, and extend the service life.

5, ceramic sensor
In modern cars, electronic parts in the average cost of each high-end car parts accounted for 30% of the ratio, car sensors as many as hundreds to hundreds, the past installed in luxury, high-end cars or special vehicles on the advanced sensors, now also have settled in the middle and low grade cars.

    The ceramic sensor materials used in automobile are thermal sensitive ceramics, gas sensitive ceramics, piezoelectric ceramics, humidity sensitive ceramics and thick film force sensitive ceramics.