Pulsed Power Nanomaterial Processing via Shock Wave Fragmentation
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Solution Overview
Problem
Conventional methods for grinding materials to the nanometric scale are inefficient in terms of yield and cost, and often require heavy and polluting pyrometallurgical or chemical treatments, as well as the use of toxic chemicals and mechanical parts that lead to high maintenance costs.
Innovation Solution
A process utilizing pulsed power with a succession of electrical discharges between electrodes in a reactor filled with an ambient liquid, generating mechanical shock waves and electric arcs to fragment and separate materials, allowing for nanometric scale processing without mechanical parts and toxic chemicals, and incorporating a cooling system for efficient energy use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional mechanical crushers are used for grinding materials, then material processing can be achieved, but wear and tear on parts degrades system efficiency and increases maintenance costs
Solution Approach 1:
The patent replaces the mechanical crusher system with an electrical discharge system that uses electrical arcs to grind materials. The electrical discharge grinding apparatus uses electrodes to generate arcs that erode and fragment materials without mechanical contact, eliminating wear and tear on mechanical parts while maintaining grinding efficiency.
2Ease of manufacture
If pyrometallurgical or chemical treatments are used for material processing, then materials can be treated effectively, but the treatments are heavy and polluting
Solution Approach 1:
The patent substitutes pyrometallurgical and chemical treatment processes with electrical discharge processing. The electrical arcs directly fragment and treat materials through physical erosion and localized heating without requiring toxic chemicals or heavy pyrometallurgical operations, thereby eliminating pollution while maintaining treatment effectiveness.
3Manufacturing precision
If conventional grinding processes are used to obtain nanoscale materials, then material processing can be performed, but the yield is unsatisfactory
Solution Approach 1:
The patent employs periodic electrical discharges in pulsed mode to grind materials to nanoscale dimensions. The repeated pulsed electrical arcs progressively fragment materials while the liquid medium continuously refreshes the grinding environment, preventing agglomeration and enabling high-yield production of nanoscale particles with controlled size distribution.
4Productivity
If high energy is used in pulsed power processing, then materials can be processed effectively, but energy costs increase
Solution Approach 1:
The patent utilizes phase transitions of the liquid medium during electrical discharge processing. The electrical arcs cause localized vaporization and bubble formation, and the subsequent collapse of these bubbles generates shock waves that enhance material fragmentation. This phase transition mechanism amplifies the grinding effect while allowing the use of lower overall energy input compared to continuous high-power processing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method achieves high-efficiency nanometric scale processing with reduced energy consumption and maintenance costs, avoiding the need for polluting treatments and toxic chemicals, while enabling the production of materials like nanodiamonds with improved yield and reduced processing time.
Implementation Method 1
a succession of electrical discharges is generated between at least two electrodes in a reactor receiving an ambient liquid as well as materials to be valorized, characterized in that the succession of said electrical discharges produces, due to the energy, the frequency of the electrical discharges, as well as due to the voltage between the electrodes and the switching time, a mechanical shock wave which propagates on the materials and/or products to be treated
Implementation Method 2
The resistivity of the ambient liquid and the transient state of the matter during the pulses cause the passage of channels of energy-charged electric arcs inside the immersed material and between the grains of said material, until the creation of a single or multiple electric arc between the two electrodes and passing through said immersed material
Implementation Method 3
during the implementation of said process, said ambient liquid is cooled by a continuous or carousel cooling system
Data Source
Figure 1
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Figure 4a~5b
AI summary
The invention relates to a method for reusing material by pulsed power, according to which a series of electrical discharges are generated between at least two electrodes in a reactor receiving an ambient liquid as well as the materials to be reused, characterized in that the series of said electrical discharges produce, as a result of the energy, the frequency of the electrical discharges, as well as, as a result of the voltage between the electrodes and the switching time, a mechanical shockwave which propagates over the materials to be processed in the reactor, and in that, during the implementation of said method, said ambient liquid is cooled by a continuous or carousel cooling system, said method enabling the production of nanoparticles.