Lead-Free Composite Radiation Shielding with Adjustable Density
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Solution Overview
Problem
Lead-free composite materials for radiation shielding face challenges with increased viscosity at certain filler content levels, making them difficult to cast and process effectively, while maintaining non-toxicity and radiation protection.
Innovation Solution
Combining a thermosetting polymer with heavy and light particulate fillers such as tungsten, osmium, and barium sulfate to create a composite material with adjustable density and radiation shielding capabilities, allowing for casting or liquid phase sintering processes to form a lead-free, non-toxic radiation shielding device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If lead-free composite materials contain fillers in certain amounts to achieve radiation shielding, then radiation protection efficiency is improved, but viscosity increases making casting difficult or impossible
Solution Approach 1:
The patent applies parameter changes by carefully controlling the viscosity of the liquid polymer matrix and adjusting filler particle size distribution to optimize both radiation shielding performance and castability. By modifying physical parameters like viscosity and particle dimensions, the invention achieves high filler content (for radiation protection) while maintaining processability
Solution Approach 2:
The invention uses composite materials by combining liquid polymer matrices with high-density filler particles (such as barium sulfate, tungsten, or other heavy metals) to create a composite that achieves radiation shielding properties comparable to lead while maintaining lower viscosity and improved castability through the liquid polymer medium
2Reliability
If lead is used for radiation shielding, then radiation protection efficiency and low cost are achieved, but toxicity to humans and animals occurs
Solution Approach 1:
The patent replaces toxic lead with alternative filler materials that can be used in polymer composites, achieving similar radiation protection without the harmful toxic effects. The composite materials use fillers like barium sulfate, tungsten, or other non-toxic heavy metals embedded in polymer matrices, providing disposable or replaceable shielding solutions that are safe for handling and disposal
Solution Approach 2:
The invention creates composite materials that combine polymer matrices with radiation-shielding fillers, achieving lead-equivalent protection without toxicity. The composite structure allows for optimized performance while eliminating the harmful effects of pure lead through material composition design
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
The composite material achieves effective radiation shielding across a broad range of radiation energy levels, from 5 kVp to 300 kVp, with adjustable density and improved processability, maintaining non-toxicity and ease of handling.
Implementation Method 1
The composite material achieves effective radiation shielding across a broad range of radiation energy levels, from 5 kVp to 300 kVp
Implementation Method 2
Combining a thermosetting polymer with heavy and light particulate fillers such as tungsten, osmium, and barium sulfate to create a composite material with adjustable density and radiation shielding capabilities
Data Source
AI summary
A lead-free, non-toxic composite material including a thermosetting polymer and at least one of a heavy particulate filler, a light particulate filler or a combination thereof. The composite material may be utilized in manufacturing articles used in radiation shielding applications.