The commonly used processes for processing precision ceramic parts mainly include the following:

1. Powder preparation: This is the first step in precision ceramic manufacturing, involving the synthesis and treatment of high-purity ceramic powders. The particle size, shape and distribution of the powder directly affect the effect of subsequent molding and sintering.

2. Molding technology:

Dry press molding: Powder is placed in a mold and formed by pressure. This method is suitable for parts with simple shape and small size.

Injection molding: Similar to plastic injection molding, suitable for complex shapes and high-precision ceramic parts.

Extrusion molding: The extrusion of powder into the desired shape by an extruder, often used in tubular or rod shaped products.

3. Sintering: The ceramic parts after forming need to be sintered at high temperatures to increase their density and strength. The sintering temperature is usually between 1000°C and 2000°C, depending on the type of material.

4. Mechanical processing:

Grinding: Fine grinding of sintered ceramics using diamond grinding wheels to achieve higher accuracy and surface finish.

Cutting: Using laser cutting or ultrasonic cutting technology, precise cutting of ceramics.

Drilling: The ceramic is drilled using special drill bits and equipment.

5. Surface treatment: In order to improve the wear resistance, corrosion resistance or aesthetics of ceramic parts, surface treatment is often needed, such as polishing, coating, etc.

These process steps require a high degree of skill and experience to ensure the quality and performance of the final product.

Alumina ceramics is a kind of high performance material which is widely used in industry and scientific research fields. It is known for its excellent heat resistance, wear resistance and chemical stability. Under heat treatment, alumina ceramics show excellent temperature resistance. With a melting point of up to 2050°C, it maintains stable physical and chemical properties at high temperatures and is not prone to thermal decomposition or softening. This high temperature resistance makes alumina ceramics widely used in high temperature stoves, refractory materials and aerospace and other fields.

In addition, alumina ceramics also have good thermal shock stability, that is, when rapidly heated or cooled in a short period of time, it can resist cracks and damage caused by temperature changes. This characteristic is mainly due to its uniform microstructure and good heat conduction performance, which helps to disperse and slow down thermal stress.

In terms of toughness, although alumina ceramics are brittle materials, their fracture toughness can be improved to a certain extent after special process treatment, such as adding toughening agents or using composite structure design. These improvements help to improve the reliability and service life of alumina ceramics under complex working conditions.