Li Jian, male, 1963, was born in Chenggong, Yunnan. College degree, the first level of secondary education. 1983 graduated from the chemistry department of Yuxi Normal University, Yunnan Province, and has been engaged in chemistry teaching and research in middle schools for a long time. Now he is in charge of teaching and scientific research in the chemical biology laboratory. In 2006, he won the first prize of self-made teaching AIDS from Hongta District Education Bureau, the first prize of self-made teaching AIDS from Yuxi City in 2006 and the second prize of self-made teaching AIDS from Yunnan Province in 2006. Invented a demonstrator of material conductivity, patent number: ZL2006200 19496.8. Summary of the Invention: This patent is a demonstrator of conductive substances. In the current textbook, it is said that "the aqueous solution of acid, alkali and salt is a conductor", which is difficult for students to understand. The existing physical structure is complex and bulky, and the connection relationship of circuit elements is not intuitive, which greatly affects students' understanding of experimental operation steps and results. Using external ordinary alternating current as power supply and transforming through transformer makes the circuit control system too complicated and increases the manufacturing cost, which is not convenient to popularize. In addition, the instrument can't demonstrate the conductivity of bulk materials. The utility model has the advantages of integrated design, compact appearance, convenient carrying, simple operation, stable performance and easy maintenance. Summary: The invention provides a simple physical structure and intuitive circuit connection. By concentrating the wires on the panel, the panel can be easily disassembled, so that students can intuitively see the actual circuit connection of the instrument, thus more clearly and profoundly understanding the operation steps and principles of the experiment. Using dry battery as power supply makes the experimental process safer. Two metal sheets are installed at the connection between the panel and any pair of electrodes, so that the instrument can not only do the conductivity experiments of substances in physics, but also do the conductivity experiments of acids, alkalis and salts in chemistry, and demonstrate the conductivity of massive substances at the same time. The demonstrator won the first prize of Yuxi's self-made teaching aid in 2006. In the past two years, teachers and students have responded well and unanimously praised it as a good invention. The equipment has the advantages of simple physical structure, low technical requirements, easily available materials, low manufacturing cost and easy popularization. It is suitable for physical chemistry teaching in middle schools and has a broad market prospect.
Li Jian, male, Han nationality, professor, 196 1 born in Donggou County, Liaoning Province, 1985 graduated from Liaoning University with a master's degree in philosophy. Now he is a professor in the Department of Administration and Public Administration, a tutor for master students and a doctoral student. He is also a member of Shenyang CPPCC and the executive director of Liaoning Social Society. 200 1 won the young and middle-aged backbone teacher in Liaoning province.