Preparation method of graphite heat radiation fin

Abstract

The invention discloses a preparation method of a graphite heat radiation fin. The preparation method comprises the following steps: 1. mixing fined graphite power with carbon element content of more than 99.999% with strong acid for acid treatment; and then soaking for 150 minutes at the temperature higher than 100 DEG C; 2. rinsing the graphite powder which is subjected to the acid treatment till the pH value is between 6.6 and 6.8; 3. then adding the graphite powder, metal powder, a silane coupling agent, a titanate coupling agent into pure water, mixing fully, carrying out high-temperature expansion on the mixture for 2 hours at 1000 DEG C-1200 DEG C, and then cooling to the room temperature slowly and drying to obtain a graphite compound; 4. extruding the graphite compound into a platy graphite heat radiation fin by using a graphite coiling device; and 5. spraying an aluminum layer on the surface of the graphite heat radiation fin. The preparation method of the graphite heat radiation fin has no harmful defect on the graphite material, and no environment pollution is caused in the production process, the mechanical strength and purity of the prepared graphite heat radiation fin are improved greatly, and the service life of the prepared graphite heat radiation fin is long.

Description

technical field [0001] The invention relates to a method for manufacturing a graphite heat sink, in particular to a method for manufacturing a graphite heat sink capable of rapid heat dissipation. Background technique [0002] With the rapid development of microelectronics integration technology and high-density printed board assembly technology, the assembly density has increased rapidly, and the volume of LED components has been reduced by thousands of times. LED instruments and equipment are increasingly becoming lighter, thinner, shorter, and smaller. . When the LED emits light, it will release high heat, and the working thermal environment of the LED will move rapidly to the high temperature direction; at this time, the heat generated when the LED reflects light will accumulate and increase rapidly. The normal operation and timely heat dissipation become the key limiting factors affecting the LED light decay and its service life. In order to ensure the reliability of...

AI Technical Summary

Problems solved by technology

However, in this method, part of the graphite particles will be dissolved, and the resulting product has more impurities, so it can only be used in conventional heat dissipation products.