Aqueous Ceramic Dispersion Using Hansen Parameters and Viscosity
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Solution Overview
Problem
Existing methods for dispersing solid particles in water for ceramic sintered body production face issues with unstable dispersibility, leading to defects like cracks due to temperature differences and reliance on intuition or trial and error for optimal dispersant amounts, which are not technically established.
Innovation Solution
A manufacturing method that selects solid particles and dispersants based on Hansen solubility parameter distances and overlaps, determining an optimal dispersant amount by measuring viscosity changes during mixing to achieve stable dispersibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If solid particles are dispersed in water using conventional methods, then the ceramic sintered body can be manufactured, but the dispersibility is unstable leading to defects like cracks
Solution Approach 1:
The patent applies Hansen solubility parameter theory to select dispersants based on quantitative parameter matching. By calculating the Hansen sphere distance (Ra) between solid particles and dispersant, and comparing it to water's Hansen parameters, the method identifies optimal dispersant combinations that maximize dispersibility stability and prevent aggregation-induced defects during sintering.
Solution Approach 2:
The patent uses Hansen solubility parameters as an intermediary framework to bridge the selection between solid particles and dispersants. This parameter-based intermediary system provides an objective criterion for selecting dispersants that ensure stable dispersibility, replacing intuitive or trial-and-error methods with a scientifically grounded selection process.
2Manufacturing precision
If intuitive or trial and error methods are used to determine dispersant amount, then the process can be simplified, but the optimal amount is not technically established leading to poor dispersibility
Solution Approach 1:
The patent establishes a quantitative parameter-based method using Hansen solubility parameters (δd, δp, δh) to determine optimal dispersant amount. By calculating the Hansen sphere distance Ra and comparing it with water's parameters, the method provides a technically grounded criterion for dispersant selection and dosing, replacing intuitive methods with objective measurements.
Solution Approach 2:
The patent replaces the mechanical trial-and-error approach with a theoretical calculation system based on Hansen solubility parameters. This substitution uses computational methods to predict optimal dispersant selection and amount, eliminating the need for repeated experimental trials while improving manufacturing precision.
3Reliability
If conventional dispersing methods are used, then the process is simple, but density variations occur leading to breakage in ceramic sintered body
Solution Approach 1:
The patent uses Hansen solubility parameter matching to achieve uniform dispersion of solid particles. By selecting dispersants with optimal parameter combinations (minimizing Ra distance while considering water compatibility), the method ensures homogeneous particle distribution that prevents density variations and subsequent breakage during sintering, thereby improving both reliability and strength.
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
This method ensures high-dispersion stability, reducing density variations and preventing defects in the ceramic sintered body, such as breakage.
Implementation Method 1
a liquid dispersant that reduces the surface tension between the solid particles and water
Implementation Method 2
determining an optimal dispersant amount by measuring viscosity changes during mixing
Data Source
AI summary
In a manufacturing method for manufacturing a dispersion body, a plurality of types of solid particles, water, and a liquid dispersant are mixed. In the manufacturing method, at least two types of the solid particles and at least one type of the dispersant that are selected based on a material type selection method are used, and at least an optimal amount of the dispersant that is determined based on an optimal amount determination method is added and mixed. The material type selection method is based on a Hansen solubility parameter distance to water, Hansen spheres of the solid particles, and a Hansen sphere of the dispersant.