Like information technology and biotechnology, every innovation in materials science and technology will lead to a revolution in production technology, accelerate social development and bring about changes in social production and lifestyle.
The performance of new materials is superior to that of traditional materials. At present, the variety of new materials in the world is increasing at a rate of about 5% per year. Strolling through the exhibition hall of new materials specialty in the Civic Center, people are overwhelmed with nano-materials, superconducting materials, special functional materials and new materials. The application of superconducting materials has unlimited business opportunities.
In the exhibition area of Beijing Institute of Nonferrous Metals, in addition to a brand-new Ni-MH battery test vehicle, the ongoing high-temperature superconducting magnetic levitation teaching demonstration on the booth also attracted many interested exhibitors.
On a cylindrical metal block filled with superconducting materials, there is a permanent magnet weighing 30 kilograms. After the staff poured liquid nitrogen at minus 196 degrees Celsius into the hollow magnet, the magnet immediately suspended. With a slight push, the magnet began to rotate. It is understood that its maximum suspension force can reach more than 200 kg. The maglev traffic model on the other side also attracted curious audiences. After injecting liquid nitrogen into the car model with superconducting materials, it can be suspended on the magnetic track with a little power.
According to reports, high-temperature superconducting materials can show superconductivity, that is, zero resistance and diamagnetism, at the temperature of liquid nitrogen (MINUS 196 degrees Celsius). Because there is no contact and friction between moving objects in suspension, it can realize high-speed movement with almost no resistance, and can be used to make frictionless bearings, flywheel energy storage devices and magnetic levitation vehicles.
According to Professor Cao Bisong from Institute of Physics, Chinese Academy of Sciences, HTS materials are an extremely important achievement of basic research in the 20th century. At present, HTS materials have made great breakthroughs in communication, satellite, radar, electronic warfare system and other fields. Among them, in the field of mobile communication, global industrialization has begun to take shape. The HTS filter made of superconducting film can improve the anti-interference ability of the receiver, increase the capacity of the base station, expand the coverage, improve the call quality and reduce the transmission power required by the mobile phone. At present, Europe, America, Japan and other countries and regions have started commercial operations. He said that HTS microwave subsystem can also bring revolutionary changes to satellites and military weapons and equipment. The missile guidance is accurate, the radar detection ability is enhanced, and the satellite payload performance can be greatly improved. All-round penetration of nanotechnology
In the exhibition hall of new materials, the word nano is no longer a mysterious concept. The extensive penetration of nanotechnology in ceramics, bathroom, building materials, waterproof materials, special materials, biomedicine and other fields has made exhibitors truly feel the affinity of nanotechnology.
Professor Zhang Dayou from the Scientific Research Department of Wuhan University of Technology told the reporter that among the five excellent projects brought by the school, such as photoelectric material technology and optical fiber sensors, the most popular one is the cancer suppression project of bio-inorganic nanoparticles.
He said that after seeing relevant reports, many people just bought tickets for this cancer suppression project. According to reports, studies have shown that some inorganic nanoparticles have the specificity to kill cancer cells. When these inorganic nanoparticles are as small as nanometers, they can enter cancer cells, change the expression of oncogenes, prevent the proliferation of cancer cells and inhibit the growth of cancer cells, with little impact on normal cells. Cell culture and animal experiments show that hydroxyapatite nanoparticles have the specificity of killing cancer cells. With the entry of nanotechnology, new broad-spectrum anticancer drugs may appear, opening up a new world for cancer treatment.
It is understood that the project is currently in the stage of animal experiments and no clinical experiments have been conducted. Even so, many exhibitors leave their phone numbers, and some are even willing to do clinical experiments with sick relatives.