Additive Manufacturing of Inorganic Crystalline Materials
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Solution Overview
Problem
Current methods for producing semiconductor materials, laser crystals, and scintillators are time-consuming and costly, requiring bulk crystal growth and complex deposition techniques that do not effectively control their mechanical, electrical, photonic, and optical properties.
Innovation Solution
Additive manufacturing techniques using a directed heat source to locally heat and cool combined starting materials, allowing for precise control of properties and reducing the need for sequential purification and synthesis steps, enabling the creation of high-purity, uniform single crystalline products with tailored properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If bulk crystal growth techniques are used, then high-purity crystalline materials are produced, but the process requires significant time and energy expenditure
Solution Approach 1:
The bulk crystal growth process is segmented into localized regions that are independently heated and processed. The directed heat source moves through the charge, creating sequential melting and crystallization zones, allowing parallel processing of multiple regions simultaneously rather than growing one large crystal at a time.
Solution Approach 2:
The invention changes the thermal parameters by using a directed heat source that rapidly heats specific regions above the melting point and then allows controlled cooling. This dynamic temperature control enables faster crystallization compared to traditional slow bulk growth methods while maintaining material purity.
2Manufacturing precision
If complex chemical vapor deposition techniques are used, then thin film materials are produced, but the process requires significant time and energy expenditure
Solution Approach 1:
The invention replaces complex chemical vapor deposition processes with a thermal-based additive manufacturing approach. Instead of using chemical reactions in vacuum chambers, the directed heat source directly melts and crystallizes the charge materials, eliminating the need for complex deposition equipment and reducing energy consumption.
3Manufacturing precision
If traditional sequential processing steps are used, then pure crystalline materials are produced, but multiple sequential steps increase manufacturing complexity and time
Solution Approach 1:
The invention merges multiple sequential processing steps (purification, synthesis, crystal growth, and fabrication) into a single additive manufacturing process. The directed heat source performs all these functions simultaneously by controlling the melting and crystallization of the charge materials in place, eliminating the need for separate processing equipment and steps.
4Manufacturing precision
If bulk crystal growth is used, then crystalline materials are produced, but post-growth fabrication is required to create appropriately sized materials
Solution Approach 1:
The invention performs preliminary sizing and shaping during the crystal growth process itself. The directed heat source creates crystals of the desired size and geometry directly through controlled melting and crystallization, eliminating the need for subsequent post-growth fabrication steps to cut and shape the crystals.
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 significant cost reductions, improved material quality, and the ability to control functional properties of inorganic crystalline materials, enabling their use in applications like microelectronics and radiation detection with enhanced efficiency and precision.
Implementation Method 1
A directed heat source, such as a laser, electron beam, or infrared radiation, is then used to additively manufacture the crystals by precisely locally heating regions within the charge above the alloying point in succession
Implementation Method 2
Another approach is to synthesize the compound prior to additive manufacturing and then use the sequentially directed heat source to take very small regions above the melting point in order to melt the material in succession
Implementation Method 3
As the directed heat source moves to an adjacent region within the charge, the previous location begins to cool and crystallize
Data Source
AI summary
A method for the additive manufacturing of inorganic crystalline materials, including: physically combining a plurality of starting materials that are used to form an inorganic crystalline compound to be used as one or more of a semiconductor, scintillator, laser crystal, and optical filter; heating or melting successive regions of the combined starting materials using a directed heat source having a predetermined energy characteristic, thereby facilitating the reaction of the combined starting materials; and allowing each region of the combined starting materials to cool in a controlled manner, such that the desired inorganic crystalline compound results. The method also includes, prior to heating or melting the successive regions of the combined starting materials using the directed heat source, heating the combined starting materials to facilitate initial reaction of the combined starting materials. The method further includes translating the combined starting materials and/or the directed heat source between successive locations. The method still further includes controlling the mechanical, electrical, photonic, and/or optical properties of the inorganic crystalline compound.