The Thermo-Gravimetric Characteristics of the Waste Game Printed Circuit Board under Different Atmosphere

Abstract:

The printed circuit board (PCB) in the electronic waste contains a variety of metals and organic materials, including bromine, heavy metals and other pollutants. Thermal treatment is an effective method for harmless disposal of waste circuit boards with resources recycle. In this study, the composition of RF4 type waste game PCB was determined by elemental analysis and proximate analysis, followed by thermogravimetric analysis of the weight lost process in CO₂、N₂ or air, at 10°C/min, 20°C/min or 30°C/min programmable heating rate, and the thermal decomposition reaction kinetics parameters were calculated with the Kissinger method. The results show that under the CO₂ atmosphere, the weight loss process of the sample consists of the 250°C～410°C and 750°C~960°C temperature intervals; under the N₂ atmosphere, the rapid weight loss stage is between 263°C and 420°C; under the air atmosphere, the weight loss process is from 178°C to 675°C, including three minor weight loss stages. The phenolic volatile components are mainly released around 260°C～360°C under three different atmospheres, while the residual carbon is further oxidized under the air atmosphere or gasified in CO₂ at temperatures above 800°C.

• Periodical: Advanced Materials Research (Volumes 1073-1076)
• Pages: 975-980
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1073-1076.975
• Online since: December 2014
• Authors: Rong Feng, Bo Wang
• Keywords: Printed Circuit Board, Thermal Decomposition, Thermogravimetry Analysis

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