Whitlockite Production via Precursor Crystallization
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Solution Overview
Problem
Current methods for producing whitlockite face challenges in achieving high-purity production on a large scale, with existing processes being complex and resulting in low yields, and difficulties in controlling the ratio of whitlockite to hydroxyapatite for effective bone or teeth tissue repair applications.
Innovation Solution
A method involving the preparation of a precursor solution by mixing calcium and magnesium ion source materials with a phosphate source material, followed by heat-treatment and purification, which allows for the stable production of high-purity whitlockite nanocrystals with controlled particle shape and composition, even in scaled-up processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional methods are used to produce whitlockite, then the production process can be simplified, but the manufacturing precision and purity of whitlockite decrease
Solution Approach 1:
The patent applies preliminary action by pre-mixing calcium and magnesium salts with phosphoric acid to form a precursor solution containing controlled molar ratios of Ca2+, Mg2+, and PO4 3- ions. This preliminary preparation ensures that when heat treatment is applied, the whitlockite crystallizes with high purity (95% or more) without requiring complex multi-step synthesis procedures, thus resolving the contradiction between process simplicity and manufacturing precision.
Solution Approach 2:
The patent utilizes parameter changes by controlling the molar ratio of Ca2+ to PO4 3- between 1:3.7 and 1:4.3, and Mg2+ to PO4 3- between 1:0.3 and 1:1.7 in the precursor solution, along with heat treatment temperature (400-1000°C) and time (1-48 hours). By optimizing these parameters, the method achieves high-purity whitlockite production through a relatively simple one-step heat treatment process, simultaneously improving ease of manufacture and manufacturing precision.
2Device complexity
If conventional methods are used to produce whitlockite, then the process can be carried out with basic equipment, but the productivity and yield of whitlockite are low
Solution Approach 1:
The patent implements continuity of useful action by using a one-step heat treatment process that continuously transforms the precursor solution into high-purity whitlockite without requiring intermediate purification steps or multiple synthesis cycles. This continuous transformation approach significantly improves productivity and yield while maintaining basic equipment requirements, resolving the contradiction between device complexity and productivity.
Solution Approach 2:
By optimizing heat treatment parameters (temperature range 400-1000°C, time 1-48 hours) and precursor solution composition (specific molar ratios of Ca2+, Mg2+, and PO4 3-), the patent achieves high whitlockite yield (70% or more) using simple equipment. The parameter optimization ensures complete conversion of precursors to product in a single step, eliminating the need for complex equipment while maximizing productivity.
3Ease of manufacture
If conventional methods are used to produce whitlockite, then the process steps are fewer, but the ability to control the ratio of whitlockite to hydroxyapatite is poor
Solution Approach 1:
The patent applies feedback by establishing a direct relationship between precursor solution composition parameters and final product phase ratio. By controlling the molar ratios of Ca2+ to PO4 3- (1:3.7 to 1:4.3) and Mg2+ to PO4 3- (1:0.3 to 1:1.7) in the precursor solution, the method provides feedback control over the whitlockite to hydroxyapatite ratio in the product, enabling precise phase composition control through a simple one-step process without requiring multiple adjustment steps.
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 enables the efficient production of high-purity whitlockite and controlled mixtures with hydroxyapatite, facilitating industrially meaningful mass production and ensuring the quality and yield of whitlockite particles, suitable for bone or teeth tissue repair applications.
Implementation Method 1
a heat-treatment step of heat-treating the precursor solution
Implementation Method 2
a step of separating and purifying a precipitate formed in the solution, after the heat-treatment step
Data Source
AI summary
The present invention relates to a method for producing whitlockite, and whitlockite produced thereby. A method for producing whitlockite according to one embodiment of the present invention comprises: a step of preparing a precursor solution by mixing a first solution containing a calcium (Ca) ion source material, a second solution containing a magnesium (Mg) ion source material, and a third solution containing a phosphate (PO4) source material; a heat-treatment step of heat-treating the precursor solution; and a step of separating and purifying the precipitate formed in the solution, after the heat-treatment step.