Ceramic Nanoparticle Production via Rotor-Stator Shear
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for producing ceramic nanoparticles face challenges such as the generation of coarse particles and the need for long reaction times, with existing techniques either resulting in non-uniform particle sizes or requiring high-pressure conditions.
Innovation Solution
A method involving the hydrolysis of ceramic materials in a thin film fluid formed between processing surfaces that can approach and separate, allowing for control of the Reynolds number to produce monodisperse ceramic nanoparticles with high productivity and efficiency, without the need for large pressure, using an apparatus that enables continuous and scalable production.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If high-speed rotational shearing and stirring is used to obtain ceramic nanoparticles, then particle formation is achieved, but coarse particles are generated and manufacturing precision deteriorates
Solution Approach 1:
The invention uses a rotor-stator structure where the rotor rotates at high speed to generate dynamic fluid flow and shear forces. This dynamic configuration creates controlled turbulence and shear zones that enable uniform nanoparticle formation without generating coarse particles, resolving the contradiction between productivity and manufacturing precision.
Solution Approach 2:
The rotor-stator structure creates localized high-shear zones between the rotor and stator surfaces. This local quality approach concentrates the hydrolysis and particle formation activity in specific regions with controlled shear rates, ensuring uniform nanoparticle size while maintaining high overall production efficiency.
2Manufacturing precision
If hydrolysis rate is regulated by adding ethylene glycol and/or diethylene glycol to achieve uniform particle size distribution, then manufacturing precision improves, but reaction time increases and productivity decreases
Solution Approach 1:
The invention replaces chemical rate regulation (using glycols to slow hydrolysis) with mechanical shear control. The rotor-stator structure provides mechanical energy input that controls particle formation kinetics through shear forces, achieving uniform size distribution without the need for slowing agents, thus maintaining high reaction rates and productivity.
Solution Approach 2:
The invention changes the control parameter from chemical composition (glycol content) to mechanical parameters (rotor speed, shear rate). By adjusting rotational speed and shear conditions, uniform nanoparticle formation is achieved rapidly without adding substances that would extend reaction time, resolving the productivity-precision contradiction.
3Ease of manufacture
If conventional ceramic material formation methods are applied to ceramic nanoparticles, then the process is simple, but the method cannot be applied due to strong cohesion of nanop particles
Solution Approach 1:
The invention transitions from bulk ceramic processing to nanoparticle-scale processing by introducing a fluid dynamic dimension. The rotor-stator configuration creates controlled fluid flow and shear fields that overcome nanoparticle cohesion forces, enabling conventional hydrolysis methods to work effectively at the nanoparticle scale while maintaining process simplicity.
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 approach enables the production of ceramic nanoparticles with smaller average particle sizes and improved uniformity, achieving high productivity and efficient manufacturing while maintaining control over particle size and reaction conditions.
Implementation Method 1
ceramic nanoparticles are obtained by hydrolyzing a ceramic material in a thin film fluid
Implementation Method 2
a Reynolds number in the thin film can be changed freely... at least one of which rotates relative to the other
Data Source
Figure 1(A)~1(D)
Figure 2(A)~2(D)
Figure 3(A)~3(F)
AI summary
The invention provides a method for producing ceramic nanoparticles, which comprises hydrolyzing a ceramic material in a thin film fluid formed between processing surfaces arranged to be opposite to each other so as to be able to approach to and separate from each other, at least one of which rotates relative to the other.