Silver Particles Manufacturing via Ultrasonic Reduction
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Solution Overview
Problem
Current silver particle manufacturing methods face issues such as the use of toxic reduction agents, high energy consumption, low yield, and complex processes, which are not cost-effective and environmentally friendly, particularly for producing nm-scale silver particles used in various industries.
Innovation Solution
A silver particles manufacturing method that utilizes chemical reduction without adding reduction agents, employing ultrasonic vibrations or heating processes with silver nitrate in N-Methyl Pyrrolidone solution, followed by centrifugation, which allows for the production of both nm-scale and μm-scale particles with the option to include polymer additives for enhanced yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If chemical reduction method is used with reduction agents, then silver particles can be produced, but the reduction agents are highly toxic and dangerous
Solution Approach 1:
The patent removes the harmful reduction agents from the silver particle production process entirely. Instead of using chemical reduction agents like sodium borohydride or other toxic substances, the invention employs a physical reduction method where silver ions are reduced to silver particles through controlled precipitation and aggregation in an organic solvent system, eliminating the need for toxic reducing chemicals while maintaining production capability
Solution Approach 2:
The patent replaces the chemical reduction mechanism with a physical-chemical process involving controlled precipitation and aggregation. Silver ions in organic solvent are reduced through controlled conditions (temperature, concentration, agitation) rather than chemical reduction agents, substituting a mechanical/physical process for a chemical one to eliminate toxicity
2Productivity
If high temperature thermal reduction method is used, then silver particles can be produced, but it requires hydrogen atmosphere at over 500°C which is highly dangerous and waste of energy
Solution Approach 1:
The patent fundamentally changes the temperature parameter from extreme high temperature (over 500°C) to moderate temperature conditions. The silver particle production is achieved through controlled precipitation and aggregation in organic solvent at much lower temperatures, eliminating the need for high-temperature hydrogen atmosphere while maintaining production efficiency
Solution Approach 2:
The patent converts the harmful high-temperature process into a beneficial low-temperature process by using organic solvent-mediated precipitation and aggregation. The conditions that would normally require extreme heat are replaced by controlled chemical environment and gentle agitation, turning a dangerous high-energy process into a safe, low-energy alternative
3Productivity
If electrochemical reduction method is used, then silver particles can be produced, but it requires large amount of electrolysis fluid which consumes large amount of electricity and has low yield
Solution Approach 1:
The patent removes the electrolysis fluid system entirely from the production process. Instead of using large volumes of electrolyte solutions that require continuous pumping and circulation (consuming significant electricity), the invention uses a simple organic solvent system where silver ions are precipitated and aggregated under controlled conditions, eliminating the energy-intensive electrolysis fluid circulation system
Solution Approach 2:
The patent employs a self-organizing precipitation and aggregation process where silver ions naturally form particles under controlled conditions without requiring continuous external energy input for fluid circulation. The system self-regulates through controlled agitation and temperature, eliminating the need for energy-intensive electrolysis fluid management
4Productivity
If conventional reduction methods are used, then silver particles can be produced, but the process steps are complicated or require devices that could cause radiation hazards
Solution Approach 1:
The patent removes complex process steps and specialized radiation-generating equipment from the production system. The silver particle formation is achieved through a straightforward precipitation and aggregation process in organic solvent, eliminating the need for complicated multi-step procedures and radiation sources while maintaining production capability
Solution Approach 2:
The patent employs a universal organic solvent system that can produce silver particles through a single integrated process of dissolution, precipitation, and aggregation. This multi-functional approach replaces multiple specialized steps and equipment with one versatile chemical system, simplifying the overall process while maintaining productivity
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 reduces pollution, lowers production costs, and increases yield, making it suitable for mass production while eliminating the need for hazardous chemicals, thus enhancing competitiveness in industries using conductive silver products.
Implementation Method 1
perform ultrasonic vibrations or a heating process until the silver containing compound is dissolved completely into the organic solution
Implementation Method 2
perform ultrasonic vibrations or a heating process until the silver containing compound is dissolved completely into the organic solution
Implementation Method 3
placing the silver particles synthesized solution into a centrifuge to perform centrifugation and separation
Data Source
AI summary
A silver particles manufacturing method comprises following steps: providing a silver containing compound; providing an organic solution; adding the silver containing compound into the organic solution, to perform ultrasonic vibrations or a heating process until the silver containing compound is dissolved completely into the organic solution, to form a silver ion solution; performing the ultrasonic vibrations or the heating process, and then let the solution settle down for a period, to form a silver particles synthesized solution; and placing the silver particles synthesized solution into a centrifuge to perform centrifugation and separation, to obtain μm-scale silver particles and nm-scale silver particles. The silver particles manufacturing method has the advantages of low pollution, low cost, high yield, and mass production.