Calcium Titanate Particle Morphology for UV Color Stability
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Solution Overview
Problem
Calcium titanate particles change color over time when exposed to ultraviolet rays, affecting the appearance of resin compositions.
Innovation Solution
A calcium titanate particle material with a circularity of 0.8 or more, specific surface area and volume-average particle diameter within certain ranges, and a slurry and resin composition containing it to suppress color change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If calcium titanate particles are used to achieve high permittivity, then the permittivity increases, but the color changes over time due to ultraviolet exposure
Solution Approach 1:
The patent applies parameter changes by precisely controlling particle morphology parameters (circularity ≥0.8, specific surface area × volume-average diameter <4) to achieve UV resistance. By optimizing these physical parameters rather than changing the material composition, the calcium titanate particles maintain both high permittivity and color stability under UV exposure
Solution Approach 2:
The patent employs preliminary action by pre-forming particles with specific spherical morphology and surface characteristics before UV exposure occurs. The particles are manufactured with controlled circularity and surface area during the sol-gel process, creating a structure that inherently resists UV-induced color change before any harmful exposure takes place
2Stability of the object's composition
If calcium titanate particles are used to achieve high permittivity, then the permittivity increases, but the dissipation factor increases
Solution Approach 1:
The patent resolves this contradiction by changing physical parameters (particle shape, surface area) rather than chemical composition. The optimized particle morphology with high circularity and controlled surface area achieves both high permittivity and low dissipation factor by reducing interfacial polarization losses while maintaining the calcium titanate's inherent dielectric properties
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 calcium titanate particle material effectively suppresses color change due to UV exposure, maintaining the appearance of resin compositions.
Implementation Method 1
calcium titanate colors upon exposure to ultraviolet rays
Implementation Method 2
supplying a raw particle material containing calcium titanate as a main component into a high-temperature atmosphere
Data Source
AI summary
An object to be achieved is to provide a calcium titanate particle material in which change in color due to radiation of ultraviolet rays is suppressed. A calcium titanate particle material of the present disclosure for achieving the above object has: a circularity of 0.8 or more; and a volume-average particle diameter and a specific surface area respectively represented by “a” (μm) and “b” (m2/g), the “a” being 0.1 or more and 8 or less, “ab” being less than 4. Since the calcium titanate particle material has this configuration, the relationship between the volume-average particle diameter and the specific surface area is made appropriate. As a result, the calcium titanate particle material allows suppression of change in color occurring over time.