Plate-like Titanium Pyrophosphate Production via Hydrothermal Synthesis
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Solution Overview
Problem
Existing methods for producing titanium pyrophosphate struggle to achieve high uniformity in size and specific particle shape, particularly in applications where water is absent and specific shapes are required, as they often result in spherical or pseudo-spherical particles and lack uniformity.
Innovation Solution
The production of plate-like titanium pyrophosphate with an aspect ratio of 5 or more, achieved through hydrothermal synthesis, drying to prevent aggregation, and heat treatment above 700°C, ensuring a narrow particle size distribution and specific particle shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional methods are used to produce titanium pyrophosphate, then the production process is simple, but the particle shape is spherical or pseudo-spherical and uniformity in size is poor
Solution Approach 1:
The patent uses plate-like titanium phosphate as a precursor with pre-formed plate-like particles. By preparing this precursor first through hydrothermal synthesis, the desired plate-like shape and size uniformity are established before the final heat treatment step, thereby achieving high manufacturing precision without requiring complex multi-step formation processes
Solution Approach 2:
The patent employs hydrothermal synthesis conditions (temperature, pressure, pH, time) as controllable parameters to produce plate-like titanium phosphate precursor with specific aspect ratio. By optimizing these parameters, the precursor achieves narrow particle size distribution and uniform plate-like shape, which is then preserved through subsequent drying and heat treatment at controlled temperatures above 700°C
2Reliability
If crystalline titanium phosphate with water of crystallization is used, then the material has good crystalline structure, but water presence causes problems in applications requiring absence of water
Solution Approach 1:
The patent removes water of crystallization from the titanium phosphate structure through heat treatment at temperatures above 700°C. This extraction of water eliminates the reliability problems in applications requiring water-free conditions, while the high-temperature treatment also serves to form the final plate-like titanium pyrophosphate structure
Solution Approach 2:
By changing the thermal treatment parameter (temperature above 700°C), the patent transforms the material from a hydrated crystalline titanium phosphate to an anhydrous plate-like titanium pyrophosphate. This parameter change simultaneously achieves both the removal of water and the formation of the desired final structure
3Shape
If titanium phosphate with pseudo-spherical particle shape is used as raw material, then the raw material is easy to obtain, but it is difficult to produce titanium pyrophosphate with specific particle shape other than spherical
Solution Approach 1:
The patent prepares plate-like titanium phosphate precursor first through hydrothermal synthesis, establishing the desired plate-like shape before the final heat treatment. This preliminary formation of the correct particle shape allows the final product to maintain plate-like morphology rather than transforming from spherical shapes
Solution Approach 2:
The patent deliberately avoids spherical particle formation and instead promotes plate-like geometry with high aspect ratio (5 or more). The hydrothermal synthesis conditions are specifically controlled to produce flat, plate-like crystals rather than spherical particles, achieving the desired non-spherical shape
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 results in plate-like titanium pyrophosphate with enhanced properties, such as improved gas barrier, lubricating, and proton conductive properties, suitable for various applications without water-related issues.
Implementation Method 1
a precursor production step of producing plate-like titanium phosphate, which is a precursor, by hydrothermal synthesis
Implementation Method 2
a precursor drying step of drying the plate-like titanium phosphate by a means capable of drying while suppressing aggregation
Implementation Method 3
a heat treatment step of, after the precursor drying step, heat-treating the plate-like titanium phosphate above 700° C.
Implementation Method 4
heat-treating the plate-like titanium phosphate above 700° C.
Data Source
AI summary
The present invention enables to provide plate-like titanium pyrophosphate, having both high uniformity in size and specific particle shape, which is expected to be highly useful. The present invention relates to plate-like titanium pyrophosphate having an aspect ratio of 5 or more expressed as a ratio of the in-plane length DPL50 of primary particles, at which the cumulative frequency from the smaller particle size side is 50% in a volume-based cumulative particle size distribution, to the thickness DPT50 of primary particles, at which the cumulative frequency from the smaller particle size side is 50% in a volume-based cumulative particle size distribution (the in-plane length DPL50 of primary particles/the thickness DPT50 of primary particles), wherein the relationship among the particle size D10 of secondary particles, at which the cumulative frequency from the smaller particle size side is 10% in a volume-based cumulative particle size distribution, the particle size D50 of secondary particles, at which the cumulative frequency from the smaller particle size side is 50% in a volume-based cumulative particle size distribution, and the particle size D90 of secondary particles, at which the cumulative frequency from the smaller particle size side is 90% in a volume-based cumulative particle size distribution, satisfies a specific relationship; and a method for producing the same.