C12A7 Semiconductor Manufacturing via Benzene Ring Decomposition
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Solution Overview
Problem
The preparation of conductive dodecacalcium hepta-aluminate (C12A7) materials is complex, costly, and difficult to control, especially when aiming for monocrystalline forms, which are needed to enhance conductivity.
Innovation Solution
A method involving the use of an organic substance with a benzene ring, calcination, and specific temperature and time controls to produce either polycrystalline or monocrystalline C12A7, where the organic substance decomposes at high temperatures to enhance conductivity without requiring a high vacuum environment, reducing equipment needs and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If monocrystalline C12A7 is used to improve conductivity, then electrical conductivity is enhanced, but preparation complexity and cost increase significantly
Solution Approach 1:
The patent changes the preparation parameters by using polycrystalline material instead of monocrystalline material, and introduces organic substance decomposition as a new parameter to achieve conductivity. This substitution of material form and introduction of chemical decomposition process resolves the contradiction by achieving good conductivity through a simpler polycrystalline route.
Solution Approach 2:
The patent introduces an organic substance as an intermediary that decomposes during heating to release carbon. This carbon then substitutes oxygen in the C12A7 lattice to create conductive properties. The organic substance acts as a mediator that enables conductivity enhancement without requiring complex monocrystalline preparation.
2Ease of manufacture
If conventional calcination methods are used to prepare C12A7, then material can be obtained, but the procedure is complex, difficult to control, and costly
Solution Approach 1:
The patent uses inexpensive organic substances (such as sugar, starch, or cellulose) that are consumed during the heating process. These cheap, disposable organic materials decompose to provide carbon for conductivity enhancement, eliminating the need for expensive monocrystalline preparation while keeping costs low.
Solution Approach 2:
The organic substance serves multiple functions: it acts as a carbon source, a reducing agent, and a process control mechanism. During heating, it automatically decomposes to release carbon and create the necessary reducing atmosphere, making the process self-regulating and easier to control without complex equipment.
3Reliability
If high vacuum environment is used to prevent oxidation during heating, then material purity is maintained, but equipment complexity and cost increase
Solution Approach 1:
Instead of using high vacuum equipment, the patent creates a reducing atmosphere in situ by introducing organic substances that decompose to consume oxygen and release carbon. This inert/reducing environment prevents oxidation of the C12A7 material during heating without requiring complex vacuum equipment, thus maintaining purity while simplifying the apparatus.
Solution Approach 2:
The patent converts the potentially harmful effect of oxygen (which could oxidize the material) into a beneficial process. The organic substance decomposes to consume the oxygen present in the atmosphere, transforming the oxidizing environment into a reducing environment that protects the material and enhances conductivity simultaneously.
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 simplifies the production of C12A7 conductive materials, achieving high electrical conductivity while being economical and easy to operate, with the benzene series providing stable and reactive decomposition products that form a carbon film to prevent oxygen intrusion.
Implementation Method 1
The organic substance containing a benzene ring can be decomposed to yield C4H2, C4H3, C6H2, C8H2, CO, H2, and carbon at high temperatures of 900-1300° C.
Implementation Method 2
Extant studies used a variety of methods, such as redox reaction and ion implantation, to replace O2− ions in the C12A7 to obtain a series of C12A7 derivatives C12A7: M−
Implementation Method 3
the carbon produced via decomposition forms a carbon film around the mouth of the test tube and on the surface of C12A7 material, thus effectively preventing the intrusion of external oxygen
Implementation Method 4
heating the test tube to a temperature of 200-300° C., and holding the temperature for 1 to 3 hours; and continuously heating the test tube to a temperature of 900-1300° C., and holding the temperature for 10-120 hours
Data Source
AI summary
A method of preparation of semiconductor material. The method includes: adding an organic substance containing a benzene ring and dodecacalcium hepta-aluminate (12CaO.7Al2O3 or C12A7) to a test tube, and sealing the test tube; heating the test tube to a temperature of 200-300° C., and holding the temperature for 1 to 3 hours; and continuously heating the test tube to a temperature of 900-1300° C., and holding the temperature for 10-120 hours.