Heat Sink Introduction

Small radiators (or heat sinks) are made of aluminum alloy sheet by stamping process and surface treatment, while large radiators are made of aluminum alloy extruded into profiles, and then made by machining and surface treatment. They are available in various shapes and sizes for different device installations and devices with different power consumption. The radiator is generally a standard part, but profiles can also be provided, and the user can cut it into a certain length according to the requirements to make a non-standard radiator. The surface treatment of the radiator includes electrophoretic paint or black oxygen polarization treatment, the purpose of which is to improve the heat dissipation efficiency and insulation performance. It can increase by 10 15% under natural cooling and 3% under ventilation cooling. Electrophoretic painting can withstand voltage of 500 800V.

Radiator manufacturers provide thermal resistance values or related curves for different types of radiators, and provide different thermal resistance values under different heat dissipation conditions.