Magnetizable Glass Ceramic Composition for Biomedical Applications
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Solution Overview
Problem
Current small particle size distribution magnetite particles used in biomedical applications are costly, limiting their scope in research and development.
Innovation Solution
A magnetizable glass ceramic composition containing ferrimagnetic magnetite crystals is developed, which can be ground into a low-cost powder for various biomedical applications, featuring a unique microstructure with homogenously dispersed magnetite crystals throughout a discontinuous glass phase.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If small particle size distribution magnetite particles are used in biomedical applications, then magnetic performance and application effectiveness are improved, but cost increases significantly
Solution Approach 1:
The patent changes the chemical composition parameters of the glass ceramic system by incorporating specific amounts of Fe2O3 (10-22 mol%), SiO2 (60-70 mol%), and other oxides to control the formation of magnetite crystals during heat treatment. By adjusting these compositional parameters and the heat treatment temperature (500-800°C), the patent achieves optimal magnetite crystal size and distribution that provides sufficient magnetic performance while enabling cost-effective bulk production.
Solution Approach 2:
The patent creates a composite glass ceramic material where magnetite crystals are embedded within a glass matrix containing SiO2, B2O3, P2O5, and other oxides. This composite structure allows the material to exhibit both the magnetic properties of magnetite and the processability, stability, and cost advantages of glass ceramic materials, enabling large-scale production at reduced cost while maintaining biomedical application effectiveness.
2Ease of manufacture
If large quantities of glass are melted and ground into powder, then production cost is reduced, but particle size distribution control becomes more difficult
Solution Approach 1:
The patent performs preliminary crystallization of magnetite within the glass matrix during a controlled heat treatment process (500-800°C for 1-24 hours) before the final grinding step. This preliminary action ensures that magnetite crystals are already formed and distributed throughout the glass structure, so that subsequent grinding produces particles with consistent size distribution and magnetic properties, even when processing large quantities of material.
Solution Approach 2:
The patent creates local regions of magnetite crystal formation within the glass matrix by controlling the phase separation and crystallization process. The magnetite crystals are homogenously dispersed throughout the discontinuous glass phase, ensuring that each particle contains appropriately distributed magnetite crystals regardless of the overall particle size, thus maintaining magnetic performance across the particle size distribution.
3Reliability
If magnetite crystals are homogenously dispersed throughout the glass phase, then magnetic properties are improved, but manufacturing complexity increases
Solution Approach 1:
The patent utilizes phase transition during heat treatment to achieve homogeneous dispersion of magnetite crystals. By heating the glass ceramic composition to 500-800°C, the material undergoes phase separation and crystallization transitions that naturally distribute magnetite crystals throughout the glass matrix. This self-organizing phase transition process achieves uniform magnetic properties without requiring complex external mixing or dispersion equipment.
Solution Approach 2:
The glass ceramic composition is designed to self-organize and self-disperse magnetite crystals during the heat treatment process. The specific composition (Fe2O3, SiO2, B2O3, P2O5, and other oxides) enables spontaneous phase separation and crystal formation that homogenously distributes magnetite throughout the glass phase without requiring additional processing steps or complex manufacturing equipment.
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 composition provides a cost-effective alternative for biomedical applications such as targeted drug delivery and magnetic hyperthermia, with magnetizable properties that are reversible and non-agglomerative, reducing costs compared to commercially available iron oxides.
Implementation Method 1
a magnetizable glass ceramic composition containing ferrimagnetic magnetite crystals
Data Source
AI summary
A magnetizable glass ceramic composition including:a continuous first glass phase including SiO2, B2O3, P2O5, and R2O;a discontinuous second glass phase including at least one of SiO2, B2O3, P2O5, R2O, or mixtures thereof; anda discrete magnetizable crystalline phase dispersed in the discontinuous second glass phase, where R2O is selected from at least one of K2O, Li2O, Na2O, or mixtures thereof. Also disclosed are a method of making and a method of using the magnetizable glass ceramic composition.