Ultra-Conductive Copper Wire via Cold Drawing and Annealing
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Solution Overview
Problem
Existing methods for producing ultra-conductive wires face challenges in achieving high conductivity while maintaining purity, often requiring large quantities of nano-carbon additives and resulting in limited production quantities and lower conductivity.
Innovation Solution
The process of cold wire drawing and annealing ultra-conductive metals with nano-carbon additives, specifically copper, to align the additives and improve the metal's crystalline structure, enhancing electrical conductivity without the need for excessive additive quantities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large quantities of nano-carbon additives are incorporated into pure metal to form ultra-conductive alloy, then electrical conductivity is significantly boosted, but the quantity of substance increases and manufacturing complexity increases
Solution Approach 1:
The patent applies parameter changes by precisely controlling the concentration of nano-carbon additives within a specific range (0.0005%-0.1% by weight) and optimizing processing parameters (cold wire drawing reduction ratio of 20%-80%, annealing temperature of 100°C-700°C, annealing time of 1 minute-10 hours) to achieve ultra-conductive properties with minimal additive quantities, resolving the contradiction between conductivity enhancement and additive quantity
Solution Approach 2:
The patent creates a composite material system combining pure copper with nano-carbon additives (graphene, carbon nanotubes, or fullerenes) where the synergistic interaction between the metal matrix and carbon nanomaterials produces enhanced electrical conductivity (100% IACS or greater) with much lower carbon content than conventional approaches, addressing both conductivity and additive quantity concerns
2Reliability
If large quantities of nano-carbon additives are used to form ultra-conductive metal, then electrical conductivity is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent simplifies manufacturing by establishing specific parameter ranges: cold wire drawing reduction (20%-80%), annealing temperature (100°C-700°C), and annealing time (1 minute-10 hours). These controlled parameters enable consistent production of ultra-conductive wire with 0.0005%-0.1% nano-carbon additive, avoiding the complexity of precise microstructure control required in conventional methods
Solution Approach 2:
The patent employs self-organizing mechanisms where cold wire drawing automatically aligns nano-carbon additives along the wire axis and annealing spontaneously recrystallizes the copper matrix, eliminating the need for complex external control systems or multiple processing steps. The material itself performs the organization function through thermally activated diffusion and deformation
3Productivity
If conventional processing methods are used for ultra-conductive metal, then production quantity is limited, but electrical conductivity improvement is insufficient
Solution Approach 1:
The patent enables scalable production by using cold wire drawing and annealing - conventional, well-established metalworking processes that can be continuously operated at high throughput. The specified parameter ranges (drawing reduction 20%-80%, annealing 100°C-700°C for 1 minute-10 hours) allow for both small-scale precision production and large-scale manufacturing while consistently achieving 100% IACS conductivity or greater
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 significantly increases the International Annealed Copper Standard (IACS) conductivity of ultra-conductive wires by up to 1.50% or greater, surpassing the improvements achieved by single processing steps, and allows for the production of high-conductivity wires suitable for various applications.
Implementation Method 1
cold wire drawing a pre-wire product formed from an ultra-conductive metal to form a drawn wire
Implementation Method 2
cold wire drawing a pre-wire product formed from an ultra-conductive metal to form a drawn wire
Implementation Method 3
annealing the drawn wire to form an ultra-conductive wire
Implementation Method 4
annealing the drawn wire to form an ultra-conductive wire
Data Source
AI summary
Ultra-conductive wires having enhanced electrical conductivity are disclosed. The conductivity of an ultra-conductive wire is enhanced using cold wire drawing and annealing. Methods of making the ultra-conductive wires are further disclosed.