Beijing Graphene Research Institute Co., Ltd. purchases HTRT-1600 ultra-high temperature conductive material resistivity tester

Beijing Graphene Research Institute Co., Ltd. (referred to as the "Company") is the achievement transformation platform of BGI's "One Body, Two Wings" industry university research collaborative innovation mechanism.

The company has successively launched a series of graphene materials, large-scale preparation equipment and process packages, and completed the laboratory to large-scale mass production of various materials such as graphene films, single crystal graphene wafers, and graphene glass fibers, as well as independent research and development, design, and production of preparation equipment.

In 2022, significant breakthroughs were achieved in the application of graphene glass fiber materials in national defense equipment, becoming the first application of the graphene new material family. The company has successively cooperated with BOE, Zhonglan Chengguang, Huaneng Group and other companies to fully promote the application of graphene new materials in national defense, aerospace, electronic information, energy conservation and environmental protection, composite materials and other fields.

The HTRT-1600 system is mainly composed of a high-precision and high stability small current source, a high-precision AD sampling chip, an embedded chip, an intelligent management and analysis software for the upper computer, and a vacuum multi-stage temperature control heating device. It is an intelligent storage and analysis instrument for ultra-high temperature conductive resistivity. The testing of conductive metal samples is carried out by arbitrarily setting heating according to the testing process requirements, and analyzing the internal structural changes of the metal such as phase transition, carbides, solid solubility, etc. through precise measurement of resistivity during the process. The device can be directly powered on for heating and applied to graphite self heating, and can also be tested in a high-temperature environment. It is currently an important equipment for researching conductive materials, as well as an important scientific research equipment for universities and production testing units.

1、 Main performance: The electrical characteristics of conductive materials are mainly characterized by resistivity. The factors that affect resistivity include temperature, impurity content, cold deformation, heat treatment, etc. The influence of temperature is often represented by the temperature coefficient of the electrical resistivity of conductive materials. Except for near melting point and ultra-low temperature, the resistivity varies linearly with temperature in the general temperature range.

2、 Composite polymer conductive materials are made by filling composite, surface composite, or layered composite of general polymer materials and various conductive substances. The main varieties include conductive plastics, conductive rubber, conductive fiber fabrics, conductive coatings, conductive adhesives, and transparent conductive films.

The fundamental reason why graphite can serve as a conductive material lies in its structure and electronic properties. Graphite is an allotrope of carbon, composed of layers of carbon atom planes, each layer called graphene. In these planes, carbon atoms form a hexagonal honeycomb structure with sp ^ 2 hybridized orbitals, and each carbon atom is connected to its three nearest carbon atoms through sigma bonds, forming a very stable two-dimensional plane. In addition, each carbon atom also has an electron on the puz orbital that does not participate in the formation of the σ bond, but contributes to the π bond, forming a π electron cloud.