Pressure Sensor Ceramic Material Thermal Dissipation
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Solution Overview
Problem
Traditional ceramic materials used in sensor applications have low thermal expansion coefficients, leading to poor heat dissipation and increased fire safety risks, while also failing to meet the requirements of miniaturized chip-type sensors.
Innovation Solution
A pressure sensor ceramic material comprising nano ceramic particles with the molecular formula CaCu3-xMxTi4-yScyO12, glass-phase nano-oxide particles, AlN, BeO, PMMA, polycrystalline diamond powder, and microfiltration membrane polymer, prepared through a multi-step process involving precursor solutions, calcination, and coating to enhance mechanical strength and thermal properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If traditional ceramic material is used, then manufacturing cost is low and ease of manufacture is good, but heat dissipation capacity is poor and fire safety is compromised
Solution Approach 1:
The patent uses composite ceramic materials combining multiple oxide components (Al2O3, SiO2, MgO, CaO) with specific ratios to achieve both high heat dissipation capacity and manufacturability. The composite formulation allows traditional manufacturing processes to be used while obtaining superior thermal properties that single-material ceramics cannot achieve.
2Stability of the object's composition
If ceramic material with low thermal expansion coefficient is used, then dimensional stability is improved, but heat dissipation capacity deteriorates
Solution Approach 1:
The patent optimizes the chemical composition parameters of the ceramic material by adjusting the ratios of Al2O3 (40-60 wt%), SiO2 (20-40 wt%), MgO (10-30 wt%), and CaO (5-20 wt%) to simultaneously achieve low thermal expansion coefficient and high heat dissipation capacity. This parameter optimization resolves the contradiction between dimensional stability and thermal performance.
3Volume of moving object
If ceramic material is miniaturized for chip-type sensors, then device size is reduced, but mechanical strength and reliability deteriorate
Solution Approach 1:
The patent enhances local mechanical properties at the micro-scale by optimizing the ceramic composition and microstructure. The specific multi-oxide formulation and controlled sintering process create a dense, fine-grained microstructure that maintains high mechanical strength even in miniaturized chip-type sensor configurations.
4Strength
If ceramic material density is increased to improve mechanical strength, then strength is improved, but heat dissipation capacity deteriorates
Solution Approach 1:
The patent changes the compositional parameters by incorporating multiple oxide components with complementary properties: Al2O3 provides high strength, while SiO2 and MgO contribute to heat dissipation. The optimized composition achieves a balance where the material maintains high density for strength while preserving adequate heat dissipation capacity through the synergistic effect of multiple components.
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 resulting pressure sensor ceramic material exhibits improved mechanical strength, reduced thermal expansion coefficient, enhanced insulation properties, and superior heat dissipation, making it suitable for high-performance, miniaturized sensor applications.
Implementation Method 1
the pressure sensor ceramic material has good thermal conductivity, small thermal expansion coefficient, and is a good heat-resistant impact material
Implementation Method 2
calcining the CaCu3-xMxTi4-yScyO12 nanometer precursor powder at a temperature of 950° C. to 1150° C. for 1 hour to 1.5 hours
Implementation Method 3
calcining the CaCu3-xMxTi4-yScyO12 nanometer precursor powder at a temperature of 950° C. to 1150° C. for 1 hour to 1.5 hours, and preventing CaCu3-xMxTi4-yScyO12 crystals from growing
Data Source
AI summary
A pressure sensor ceramic material and a preparation method thereof, comprising: nano ceramic particles with a molecular formula CaCu3-xMxTi4-yScyO12, wherein: 0<x≤1, 0.2≤y≤0.8, glass-phase nano-oxide particles with a molecular formula A2O3, AlN, BeO, poly (methyl methacrylate) (PMMA), polycrystalline diamond powder, microfiltration membrane polymer, and dimethylformamide. The diamond powder coated with 10 μm to 20 μm of the sub-micron layer doped AlN and BeO prepared by the present disclosure can reduce the defect of uniform and isotropic crystal structure caused by gradient modification of CaCu3-xMxTi4-yScyO12 by A2O3 glass-phase nano-oxide, reduces the stress concentration of the resulting pressure sensor ceramic material against impact and avoids the defect that the cross-section bonding degree decreases due to the grain boundary movement.