Patent registered for Method for manufacturing N-type thermoelectric carbon nanotubes
The invention relates to technologies for the construction of thermal generators using n-type and p-type semiconductor materials. The method of manufacturing carbon nanotubes with n-type conductivity increases the thermal stability of thermoelectric materials and improves the thermoelectric and electrical properties in the way required for technological applications.
The invention relates to the improvement of the properties of n-type thermoelectric materials required for the construction of thermogenerators. The method of manufacturing carbon nanotubes (CNTs) with n-type conductivity increases the thermal stability of thermoelectric materials, ensuring the operation of thermogenerators at elevated temperatures. CNTs with n-type conductivity are produced by the chemical vapor deposition (CVD) method. CNT synthesis uses a mixture of liquid hydrocarbons for CNT synthesis, such as benzene or toluene, and organic compounds, such as pyridine, acetonitrile and aniline, with N atoms that enter the CNT structure during the synthesis process instead of C atoms via covalent chemical bonds. are used as donor-type, n-type conduction defects in the CNT structure. To catalyze the CNT formation process with the help of metal nanoparticles, an organometallic compound, such as ferrocene, is added to the mixture. The method of manufacturing the n-type thermoelectric material developed in the present invention ensures the maintenance of the n-type conductivity at elevated temperatures above 150-200 °C.