Single Crystalline MgTiO3 Flake Production via Single-Step Calcination
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Solution Overview
Problem
Current methods for producing titanate flakes, such as those described in Japanese Unexamined Patent Application Publications, require multiple high-temperature heating steps, resulting in high energy costs, longer production times, and complications, while producing polycrystalline flakes with lower refractive indices compared to single crystalline materials.
Innovation Solution
A method involving the mixing of a phosphorus compound with a titanium compound and a magnesium compound to form a MgTiO3 precursor, followed by a single calcination step at temperatures between 800°C to 1400°C in an oxygen-containing atmosphere, effectively producing single crystalline MgTiO3 flakes with high refractive index and luster suitable for pigment applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple high-temperature heating steps are used to produce titanate flakes, then the crystallization and phase formation are improved, but the energy consumption and production time increase significantly
Solution Approach 1:
The patent combines multiple separate heating steps (calcination and crystallization) into a single heating step that achieves both objectives simultaneously. The mixed oxide precursor is heated once to form the desired titanate phase with proper crystallization, eliminating the need for sequential high-temperature treatments and thereby reducing energy consumption while maintaining product quality
Solution Approach 2:
The patent modifies the chemical composition parameters by introducing a mixed oxide precursor containing specific ratios of metal oxides (such as TiO2, Al2O3, SiO2, and other optional oxides). This compositional adjustment allows the material to achieve proper crystallization and phase formation at lower temperatures or in a single heating step, thus reducing energy requirements while maintaining manufacturing precision
2Manufacturing precision
If multiple high-temperature heating steps are used to produce titanate flakes, then the phase formation is improved, but the production time increases
Solution Approach 1:
The patent merges the calcination step and crystallization step into a single integrated heating process. The mixed oxide precursor undergoes both phase formation and crystallization development in one continuous heating operation, significantly reducing the total production time compared to traditional methods that require separate sequential steps
Solution Approach 2:
The patent performs preliminary preparation by creating a mixed oxide precursor with controlled composition and particle characteristics before the final heating step. This pre-positioning of the correct chemical framework and physical structure enables the material to undergo rapid and efficient phase formation during the single heating step, reducing overall production time while ensuring proper phase development
3Ease of manufacture
If polycrystalline structure is used in titanate flakes, then the production process is simpler, but the refractive index is lower
Solution Approach 1:
The patent changes the chemical composition parameters of the precursor material by using a specifically formulated mixed oxide system. This compositional modification enables the formation of single crystalline structures with higher refractive indices while maintaining production process simplicity, as the controlled chemistry guides the crystallization toward the desired high-performance phase
Solution Approach 2:
The patent employs a composite oxide system in the precursor stage, combining TiO2 with Al2O3, SiO2, and other metal oxides in controlled proportions. This composite approach allows the formation of single crystalline titanate phases with enhanced optical properties (higher refractive index) while keeping the manufacturing process relatively simple through a single heating step
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 reduces energy costs and production efforts, enabling the production of high-quality single crystalline MgTiO3 flakes with high refractive index and luster, suitable for use as highly reflective pigments or interference pigments, while minimizing twin crystals and coagulations, and allowing for diameter control.
Implementation Method 1
mixing at least a titanium compound, a magnesium compound and a phosphorous compound whereby a MgTiO3 precursor is formed
Implementation Method 2
calcining the obtained precursor at a temperature in the range from 800°C to 1400°C as a single calcination step
Implementation Method 3
producing single crystalline MgTiO3 flakes
Data Source
Figure 1~2
AI summary
The present invention is related to a method for the production of single crystalline MgTiO3 flakes, in particular in the geikielite crystal structure, to single crystalline MgTiO3 flakes obtained by this method as well as to the use thereof, in particular as pigments in several application media.