Rotating Annular Crucible Layout for Continuous Silicon Nanopowder Production
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Solution Overview
Problem
Existing silicon production methods, such as carbothermal reduction, face limitations in scaling up for mass production and efficiently separating reduced silicon nanopowder, particularly due to the need for large-capacity crucibles and difficulties in continuous processing and powder separation.
Innovation Solution
An apparatus featuring a rotating annular raw material container with a motor-driven magnetic coupling, laser beam irradiation, and a collector with a filter to continuously produce and separate reduced silicon nanopowder, allowing for increased raw material loading and efficient collection of silicon nanoparticles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a large-capacity crucible is used for mass production of silicon, then the production quantity increases, but the device complexity and difficulty of separating reduced silicon nanopowder increase
Solution Approach 1:
The patent divides the production system into multiple small crucibles arranged in an array rather than using one large crucible. Each crucible can be independently processed by the laser beam, allowing parallel production while maintaining simple separation of nanopowder from each small crucible. This segmentation resolves the contradiction by achieving mass production through parallel processing of multiple small units rather than one large unit.
Solution Approach 2:
The patent introduces an intermediary collection chamber where reduced silicon nanopowder from multiple crucibles is gathered and separated. This intermediary space allows the nanopowder to be collected and separated from the crucibles without requiring complex separation mechanisms for each individual crucible, thus resolving the contradiction between mass production and separation difficulty.
2Ease of manufacture
If raw material powder is loaded into a stationary raw material container, then the setup is simple, but the production process cannot be continuous and productivity is limited
Solution Approach 1:
The patent transforms the stationary raw material container into a rotating container that moves through the laser beam path. This dynamic configuration allows continuous irradiation of fresh raw material powder while maintaining a relatively simple setup. The rotation enables multiple crucibles to be sequentially exposed to the laser beam, achieving continuous production without complex machinery.
Solution Approach 2:
The rotating array of crucibles ensures that the laser beam continuously acts on fresh raw material powder without interruption. As each crucible passes through the laser path, reduction occurs, and the rotation maintains continuous processing. This eliminates idle time between processing batches, achieving continuous production while keeping the system relatively simple.
3Device complexity
If reduced silicon powder is deposited on raw material powder in a stationary container, then the production process is simple, but the separation of reduced silicon nanopowder becomes very difficult
Solution Approach 1:
The patent extracts the reduced silicon nanopowder from the crucibles into a separate collection chamber, physically separating the product from the raw material sources. This extraction allows the nanopowder to be collected in a dedicated space where separation can occur more easily, resolving the contradiction between simple production process and difficult powder separation.
Solution Approach 2:
The patent separates the production and collection functions in different spatial dimensions. The crucibles are arranged in an array where reduction occurs, while the collection chamber is positioned in a different spatial zone where nanopowder accumulation and separation occur. This dimensional separation allows simple production in one area while enabling easy separation in another area.
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
Enables continuous production of a large amount of reduced silicon nanopowder within the same processing time, improving separation efficiency and scalability by using a rotating container and filter-based collection system.
Implementation Method 1
a motor shaft of the motor and the raw material container may be coupled to each other by virtue of magnetic force between first and second magnets provided in the motor and the raw material container, respectively
Implementation Method 2
a laser beam generator for generating laser beams irradiated to the raw material powder of the raw material container through the inlet port
Implementation Method 3
Silicon (Si) is prepared by heating silica (SiO2) powder and carbon powder in a reactor, which is called 'carbothermal reduction'
Data Source
AI summary
Disclosed is an apparatus for producing reduced silicon nanopowder, comprising: a housing having an inlet port on its top and an outlet port on its bottom; a motor installed in the housing; an annular raw material container installed inside the housing with raw material powder including silica and carbon being loaded and provided with an outer surface spaced apart from an inner surface of the housing, the raw material container rotating by receiving rotational force from the motor; and a laser beam generator for generating laser beams irradiated to the raw material powder of the raw material container through the inlet port. It is possible to load a large amount of raw material powder and thus produce more silicon nanopowder in a continuous process.