Ferrite particulate-based electronic device
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Solution Overview
Problem
Existing magnetoelectric multiferroic materials exhibit weak intrinsic magnetoelectric effects, limiting their applications, and lead-based materials pose environmental concerns, necessitating the development of lead-free alternatives with enhanced properties.
Innovation Solution
A nanocomposite is formed by combining a ferroelectric perovskite oxide, such as lead-free BaTiO3, with a rare-earth substituted mixed ternary transition metal ferrite, like Co0.7Zn0.3Tm0.01Fe1.99O4, to create a magnetoelectric multiferroic nanocomposite with improved magnetic and dielectric properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If single-phase multiferroic materials are used, then material simplicity is maintained, but the magnetoelectric effect is weak
Solution Approach 1:
The patent combines ferroelectric perovskite oxide particles with ferrite particles to form a composite nanocomposite material. This composite structure enables strong magnetoelectric coupling effects that cannot be achieved with single-phase materials, as the interaction between the ferroelectric and magnetic phases produces enhanced multiferroic properties.
2Reliability
If lead-based ferroelectric materials are used, then dielectric properties are improved, but environmental harm increases
Solution Approach 1:
The patent substitutes lead-based ferroelectric materials with barium titanate (BaTiO3) perovskite oxide, changing the chemical composition parameter while maintaining the ferroelectric properties. This substitution eliminates toxic lead content while preserving the desired dielectric and piezoelectric characteristics through careful control of the perovskite phase structure and composition.
3Reliability
If composite materials are formed to enhance magnetoelectric properties, then magnetoelectric effect is improved, but device complexity increases
Solution Approach 1:
The patent uses discrete particles of ferroelectric perovskite oxide and ferrite that can be independently synthesized and characterized. These segmented particles are then combined in controlled ratios to form the composite, allowing optimization of magnetoelectric properties while maintaining processability and relatively simple device fabrication.
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 nanocomposite exhibits enhanced dielectric constants, low dielectric loss, and adjustable magnetic properties, making it suitable for applications in ME sensors, high-frequency filters, and actuators, while being environmentally friendly.
Implementation Method 1
The ability to manipulate the magnetic properties of magnetoelectric multiferroic materials through the use of an electric field and vice-versa
Implementation Method 2
BTO exhibits a tetragonal phase that reaches Tc≈130° C. and transforms to cubic afterwards at elevated temperatures. It exhibits robust piezoelectric, dielectric, and permittivity dependent on set temperature.
Implementation Method 3
The nanocomposite exhibits enhanced dielectric constants, low dielectric loss
Data Source
AI summary
A magnetoelectric multiferroic nanocomposite. The nanocomposite comprises a ferroelectric perovskite oxide and a rare-earth substituted mixed ternary transition metal ferrite of the formula A1-xBxRyFe2-yO4. The nanocomposite has a high dielectric constant, low dielectric loss, both stable over a wide frequency range. These properties may make the nanocomposite desirable for applications in microelectronic devices, sensors and antennas.