Hansen Sphere Dispersion for Ceramic Sintering
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Solution Overview
Problem
The existing methods for manufacturing ceramic sintered bodies face challenges in achieving stable dispersibility of solid particles in water-based dispersion bodies, leading to defects such as cracks during firing, due to unpredictable combinations of raw materials and changes in dispersibility over time.
Innovation Solution
A manufacturing method that selects solid particles and a non-aqueous liquid based on overlapping Hansen spheres and a Hansen solubility parameter distance to water, ensuring optimal dispersibility by determining the combination of solid particles and liquids that mutually overlap and have the greatest solubility parameter distance, thereby reducing variations in density and preventing defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional methods are used to manufacture dispersion bodies by mixing solid particles and water, then the manufacturing process is simple, but the dispersibility of solid particles is unstable leading to defects
Solution Approach 1:
The patent applies parameter changes by using Hansen solubility parameters to quantitatively characterize and select materials. Specifically, it changes the selection criteria from conventional empirical methods to a systematic approach based on Hansen sphere overlap and solubility parameter distance to water, thereby improving dispersibility stability while managing material selection complexity
Solution Approach 2:
The patent introduces Hansen solubility parameters as an intermediary framework to mediate between solid particles and water. By using the Hansen sphere overlap concept and solubility parameter distance as intermediate evaluation criteria, it enables predictable selection of solid particle-liquid combinations, resolving the contradiction between reliability improvement and complexity increase
2Ease of manufacture
If solid particles are dispersed in water-based dispersion bodies, then the dispersion body can be used for ceramic sintered body manufacturing, but cracks and defects occur during firing due to unstable dispersibility
Solution Approach 1:
The patent applies preliminary action by selecting solid particles and liquids based on Hansen sphere overlap and solubility parameter distance to water before the dispersion body is manufactured. This pre-selection ensures optimal dispersibility from the outset, preventing cracks and defects during subsequent firing processes while maintaining manufacturing ease
Solution Approach 2:
The patent changes the selection parameters for solid particles from conventional criteria to Hansen solubility parameter-based criteria. By using the solubility parameter distance to water and Hansen sphere overlap as quantitative parameters, it achieves both ease of manufacture and high manufacturing precision through predictable material selection
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 method achieves favorable dispersibility and reduces variations in density, preventing defects like cracks in the ceramic sintered body, ensuring a high-dispersion state is maintained throughout the manufacturing process.
Implementation Method 1
the solid particles and the liquid are selected such that Hansen spheres of at least two types of the solid particles and a Hansen sphere of at least one type of the liquid mutually overlap, and a Hansen solubility parameter distance to water of at least one type of the solid particles of which the Hansen spheres overlap that of the liquid is greatest
Data Source
AI summary
In a manufacturing method for manufacturing a dispersion body, a plurality of types of solid particles, water, and a liquid other than water are mixed. The solid particles and the liquid are selected such that Hansen spheres of at least two types of the solid particles and a Hansen sphere of at least one type of the liquid mutually overlap, and a Hansen solubility parameter distance to water of at least one type of the solid particles of which the Hansen spheres overlap that of the liquid is greatest among all solid particles used in manufacturing of the dispersion body, and used to manufacture the dispersion body.