Encapsulation, Electronics, Eccofoam
Polyurethane foam and casting resin for encapsulation, reinforcement, and sealing electronic equipment
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Polyurethane foam and casting resin for encapsulation, reinforcement, and sealing electronic equipment
The growing quantity of waste electrical and electronic equipment (WEEE), also known as electronic waste (E-waste), has been an area of growing public concern. The abundance of valuable metals contained in waste printed circuit boards (WPCBs) has made it a promising secondary resource, especially for Cu and Au. Although the recovery of metals from WPCBs via hydrometallurgical routes has been studied extensively over the past 20 years, most of the research has been limited in the laboratory. In current hydrometallurgical processes, strong acids and expensive oxidizers are often used to ensure a high recovery of metals without considering the sustainability aspects of the environment and economics. To improve upon current hydrometallurgical offerings, the current study seeks to develop an energy-saving, environmentally friendly, economic and sustainable process to efficiently recover the valuable metals from real-world end-of-life WPCBs. The new contributions presented in this study are 1) design and evaluation of a comprehensive hydrometallurgical flowsheet; 2) employment of real end-of-life PCBs as feed materials in an investigation on Cu-NH3 leaching kinetics; 3) further application of kinetic model on a counter flow process simulation; and 4) evaluation of the influences by co-existing metals in Au-S2O3 leaching and recommendation for favorable leaching conditions.
Spacecraft materials - manufacture of bearings, accelerometers and electronic equipment
Microelectronics program to convert electronic equipment of Saturn launch vehicle
Electric and electronic equipment and devices, and fluid amplifiers
Electronic equipment requirements and operation in space environment
Radiation effect on electronic equipment for nuclear spacecraft - transistors, diodes, and tantalum capacitors
Cycle-life tests of nickel-cadmium battery cells - spacecraft electronic equipment
Spacecraft electronic equipment to measure energetic particles in space
Electronic equipment and development of solid state image converter
Radiation effects on electronic equipment of solar spacecraft - shielding requirements
Aerospace electrical and electronic equipment reliability requirements with reference to technology of miniature electrical connection devices
Reliability in procuring electronic equipment for f-105d aircraft
Proton damage in electronic equipment based on space radiation simulation studies
Electronic equipment performance and reliability improvement to meet technological advances for deep space communication
Electronic equipment testing of UK-2/S-52 SPACECRAFT under thermal vacuum exposure
Electronic equipment design and packaging with capability of surviving hard impacts in unmanned lunar and planetary landings
Radiation effects thresholds of electronic equipment and structural materials - metals, polymers, ceramics, semiconductors, and electric components