Transparent Radiation Shield with Nanoparticulate Metal Fillers
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Solution Overview
Problem
Current radiation protection screens using leaded glass are brittle, non-recyclable, and pose environmental concerns due to lead toxicity, while lead-free alternatives fail to replicate the combination of effective ionizing radiation attenuation and visible light transmission at reasonable production costs.
Innovation Solution
A new transparent radioprotection material comprising a thermoplastic or thermosetting organic glass matrix with nanoparticulate metallic compounds, where the metals represent at least 25% by mass, providing optimal radiation protection and mechanical resistance without diffusion phenomena, and can include metals like lanthanum, gadolinium, and boron to effectively attenuate ionizing radiation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If leaded glass is used for radiation protection screens, then effective ionizing radiation attenuation is achieved, but the material becomes brittle and non-recyclable with environmental toxicity concerns
Solution Approach 1:
The patent changes the material composition parameters by replacing lead with alternative metals (tungsten, molybdenum, antimony, bismuth, barium, or lanthanum) in specific concentrations (2-80% by weight). This parameter change maintains radiation attenuation effectiveness while improving mechanical properties and environmental compatibility. The organic glass matrix composition is also adjusted to optimize the balance between radiation protection and mechanical strength.
Solution Approach 2:
The patent creates a composite material system combining organic glass matrix with metallic compounds or metal-containing glass beads. This composite structure integrates the radiation attenuation properties of metals with the mechanical flexibility and processability of organic glass, resolving the contradiction between radiation effectiveness and mechanical brittleness. The composite approach also enables recyclability and reduces environmental toxicity.
2Object-affected harmful factors
If lead-free materials are used to replace leaded glass, then environmental toxicity is reduced, but the combination of visible light transmission and ionizing radiation attenuation is not effectively reproduced
Solution Approach 1:
The patent systematically varies the composition parameters of alternative metals and their compounds to match the radiation attenuation performance of leaded glass. By adjusting the type and concentration of metal compounds (2-80% by weight) in the organic glass matrix, the patent achieves equivalent or superior radiation protection without lead toxicity. The specific parameter optimization ensures both safety and effectiveness.
Solution Approach 2:
The patent discards lead from the material composition entirely, replacing it with environmentally friendly alternative metals. The organic glass matrix with alternative metal compounds can be more easily recycled and disposed of safely compared to leaded glass, eliminating the harmful factor while maintaining protective function through carefully selected substitute materials.
3Reliability
If high metal content is incorporated into the organic glass matrix, then radiation protection characteristics improve, but manufacturing complexity and production costs increase
Solution Approach 1:
The patent optimizes the concentration parameter of metal compounds or metal-containing glass beads within a specific range (2-80% by weight) to achieve the desired radiation protection level. By carefully selecting the minimum effective concentration, the patent reduces material costs and simplifies manufacturing while maintaining adequate radiation attenuation. The parameter optimization balances performance requirements with economic feasibility.
Solution Approach 2:
The patent uses metal-containing glass beads as a pre-formed component that can be directly incorporated into the organic glass matrix. This copying approach allows the metal distribution to be achieved through simple mixing and molding processes rather than complex metallurgical operations, significantly reducing manufacturing complexity and production cost while maintaining high metal content for effective radiation protection.
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 material achieves equivalent or superior radiation protection to leaded glass while being more durable and environmentally friendly, with high metal content and minimal light absorption, making it suitable for medical and industrial applications.
Implementation Method 1
a nanoparticulate compound of a metal compound, advantageously having a maximum dimension of less than 20 nanometers... at least one type of metallic compound which attenuates ionizing radiation in the form of nanoparticles
Implementation Method 2
This new attenuator material has the advantage of having good transmission of visible light, without diffusion phenomena (or at least very little)
Data Source
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AI summary
The invention relates to a transparent material which attenuates electromagnetic radiation and/or directly or indirectly ionising particles, of particular use for the production of transparent sheets which serve as protective screens for an operator against said electromagnetic radiation and/or particles. Said transparent attenuating material is made of a matrix of an organic glass in which at least one metal radiation-attenuating compound is dispersed (advantageously other than lead) in the form of nanoparticles, advantageously in the "core-shell" form. The metals of the nanoparticle metal compounds form at least 25 % of the mass of the material.