Titanium Phosphate Powder Production via Controlled Hydrothermal Synthesis
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Solution Overview
Problem
Existing methods for producing titanium phosphate powder often result in high formation of byproducts, which reduces the purity and efficiency of plate-like particle formation, due to high heating temperatures and vigorous stirring that lead to uneven reactions and increased collision frequencies between particles.
Innovation Solution
A method involving storing an acidic raw material aqueous solution containing phosphorus and titanium in a sealed vessel at a constant temperature between 40°C and 100°C for 2 hours or more, with optional stirring at a low swirl flow rate, to reduce byproduct formation and enhance crystallinity and plate-like particle formation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high heating temperature and vigorous stirring are used in existing production methods, then reaction speed increases, but byproduct formation increases and manufacturing precision deteriorates
Solution Approach 1:
The invention changes the temperature parameter from high heating temperature to moderate temperature range (40-100°C), and changes the stirring parameter from vigorous stirring to gentle stirring or no stirring. This parameter optimization resolves the contradiction by achieving adequate reaction speed while preventing excessive particle collision and byproduct formation, thereby improving particle shape control and reducing byproduct content to 20% or less.
2Productivity
If high heating temperature is used, then reaction efficiency improves, but byproduct formation increases
Solution Approach 1:
The invention optimizes the temperature parameter to a moderate range (40-100°C) rather than using high heating temperature. This parameter change maintains adequate reaction efficiency while significantly reducing byproduct formation, as the moderate temperature prevents excessive thermal energy that leads to unwanted side reactions and byproduct generation.
Solution Approach 2:
The invention employs extended storage time (2 hours or more) at moderate temperature, replacing the need for high heating temperature. This time-temperature combination allows the reaction to proceed efficiently through prolonged exposure to moderate conditions, achieving high productivity without the harmful effects of high temperature-induced byproduct formation.
3Stability of the object's composition
If vigorous stirring is applied, then mixing efficiency improves, but particle collision frequency increases leading to reduced manufacturing precision
Solution Approach 1:
The invention applies gentle stirring or no stirring instead of vigorous stirring, using just enough mixing action to maintain homogeneity without excessive particle collision. This partial action approach achieves adequate mixing efficiency while preserving the integrity of plate-like particle formation, thereby maintaining high manufacturing precision.
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 significantly reduces the formation of byproducts, resulting in a titanium phosphate powder with a high concentration of plate-like particles and improved crystallinity, as evidenced by XRD measurements and SEM images, with a ratio of non-plate-like particles reduced to 20% or less.
Implementation Method 1
storing the sealed vessel containing the raw material aqueous solution for a period of 2 hours or more, with the ambient temperature of the sealed vessel maintained under a constant temperature condition within a range of 40° C. or more and less than 100° C.
Implementation Method 2
the raw material aqueous solution is not stirred, or during the storage, the raw material aqueous solution is stirred, and in the case where the raw material aqueous solution is stirred during the storage, a swirl flow rate in stirring the raw material aqueous solution is within a range of more than 0 m/s and 0.30 m/s or less
Data Source
AI summary
A titanium phosphate powder containing plate-like particles with a reduced content ratio of byproducts other than the plate-like particles, and exhibiting crystallinity of titanium phosphate represented by a chemical formula Ti(HPO4)2·nH2O (0≤n≤1) is provided in the present disclosure. The present disclosure relates to a method for producing a titanium phosphate powder exhibiting crystallinity of titanium phosphate represented by a chemical formula Ti(HPO4)2·nH2O (0≤n≤1), and containing plate-like particles, the method comprising putting an acidic raw material aqueous solution containing phosphorus and titanium in a sealed vessel, and storing the sealed vessel containing the raw material aqueous solution for a period of 2 hours or more, with the ambient temperature of the sealed vessel maintained under a constant temperature condition within a range of 40° C. or more and less than 100° C., wherein during the storage, the raw material aqueous solution is not stirred, or during the storage, the raw material aqueous solution is stirred, and in the case where the raw material aqueous solution is stirred during the storage, a swirl flow rate in stirring the raw material aqueous solution is within a range of more than 0 m/s and 0.30 m/s or less.