Passing by the School of Physics~~The ultra-hard laboratory is located to the east of the Physics and Chemistry Building of Jilin University. Many of my classmates went there to take exams. . I heard it’s not bad. The instructors are very good. They hold group meetings every week and organize study and research, which directly makes me and a few of them unable to play Dota. . The prospects are very optimistic, but you have to be able to sit on the bench, be a big brother, and work hard for the boss. .
Superhard materials are typical high-pressure phase materials. They play a key role in the industrial chain of many industries in the country and determine the country's industrial level. They are called "strategic materials" by developed countries. High-pressure science is the scientific basis and important frontier for the development of superhard materials. The high-pressure phase that appears under high pressure and is different from the normal material structure and properties is the source of exploring new materials. High-pressure research is an important way to obtain critical data for modern defense. The laboratory will conduct research around superhard multifunctional materials, new materials that are difficult to prepare under normal pressure, and high-pressure science. Main directions: (1) High temperature and high pressure synthesis of superhard and new functional materials. Research the physical issues and key technologies for synthesizing superhard materials under high temperature and high pressure, improve the quality of superhard materials, explore the use of high temperature and high pressure conditions to prepare new functional materials and new materials that are difficult to prepare under normal pressure, and promote the industrialization of research results. (2) Super hard multifunctional film materials. Research key preparation technologies and basic physical issues of superhard multifunctional thin film materials; develop and promote the application of superhard thin film materials in finishing tools and other aspects; study their prototype device structure and preparation technology, and explore the application of new materials in high-power optoelectronic devices and resistors Applications in high-tech fields such as radiation-resistant high-temperature semiconductors. (3) The impact of high pressure on the structure and properties of matter and high-pressure phase changes. Develop high-pressure in-situ micro-area measurement technologies such as Raman spectroscopy, X-ray diffraction, infrared spectroscopy, Brillouin scattering, and electrical measurements under high pressure, establish a theoretical system under high pressure, and explore the structure, properties, and phase changes of bulk materials and nanomaterials under high pressure. The laws provide experimental and theoretical basis for the preparation of superhard and multifunctional high-pressure phase materials. Carry out research on high voltage technology in other disciplines. Since the establishment of the laboratory, scientific research work has made significant progress: 1. High-temperature and high-pressure synthesis of superhard and new functional materials. Independently research and develop more than 20 types of high-grade diamond single crystals and special high-grade industrial diamond synthesis technologies, conduct a series of application basic research, promote the growth of the industry, and lead the development of the industry. 2. Super hard multifunctional film materials. Improved the technology and process for preparing large-sized and high-quality diamond thick films; prepared high thermal conductivity diamond film heat sinks for high-power semiconductor lasers; realized the application of diamond thick films in the field of precision machining. First to discover the superconducting properties of boron-doped diamond thick films, determine the superconducting transition temperature and zero resistance temperature; make breakthroughs in the performance calibration, energy level model and carrier transport characteristics of diamond-based broadband heterojunctions; system The growth, structure and corresponding field emission characteristics of high-hardness carbon-nitrogen (CNx) film were given in detail; the vapor phase epitaxial growth of diamond single crystal was realized, and large-sized diamond single crystal was prepared. 3. The impact of high pressure on the structure and properties of matter and high-pressure phase changes. It was discovered that metallic sodium transforms into a "transparent" wide-bandgap insulator at 2 million atmospheres. Discovered a new molecular crystal phase of iodine. Explain the presence of two new vibrational modes observed in the high-pressure in situ Raman spectra of iodine and bromine. Two intramolecular valent bonds with different bond lengths exist in the same system, which has important guiding significance for understanding molecular dissociation and the study of metallic hydrogen. On the experimental platform for in-situ material structure analysis and performance testing under ultra-high pressure and the high-pressure theoretical calculation platform constructed in the laboratory, it was discovered that pressure can effectively improve the thermoelectric efficiency of thermoelectric materials and other new high-pressure effects; it was observed that liquids under high temperature and high pressure New phase changes such as first-order phase change and pressure-induced structural metallization phase change; reveal the physical mechanism of pressure-induced phase change that was difficult to determine in many substances in the past; realize the pressure-induced pressure-induced phase change of C60 in C60 nanorods and carbon nanotubes for the first time* **Valent bond polymerization is used to obtain new quasi-one-dimensional nanomaterials with excellent properties that are difficult to obtain by normal pressure methods. These important research progress and results have published a number of high-quality papers in journals such as Nature, PNAS, and Physical Review Letters. They have won provincial and ministerial science and technology awards for many years in a row, and obtained a number of invention patents, which have improved the scientific research capabilities of the laboratory.
The laboratory promotes open exchanges through open projects, international cooperation, visiting scholars, and hosting international conferences. Many scientific research units such as the Institute of Physics of the Chinese Academy of Sciences have undertaken open projects in the laboratory. They have maintained good long-term cooperative relations with internationally renowned research institutions such as the Carnegie Institution of Washington in the United States, and hosted international conferences such as the "International Academic Invitational Conference on High Voltage Materials". Every year, senior visiting scholars from the United States, Sweden, Germany, and South Korea come to the laboratory to attend meetings or give reports at the "Frontier Forum on Material Science" organized by the laboratory. With the strong support of the supporting unit Jilin University, the long-term goal of the laboratory is to reach the international advanced level in its main research directions and to reach the international leading level in several research fields. Academically, we have done important original work, promoted the development of the discipline, and built the laboratory into an internationally important research center for superhard multifunctional materials and high-pressure science. Promote the industrialization of scientific research results and contribute to improving the scientific and technological level of my country's superhard materials industry, enhancing international competitiveness and achieving sustainable development.
Superhard materials are typical high-pressure phase materials. They play a key role in the industrial chain of many industries in the country and determine the country's industrial level. They are called "strategic materials" by developed countries. High-pressure science is the scientific basis and important frontier for the development of superhard materials. The high-pressure phase that appears under high pressure and is different from the normal material structure and properties is the source of exploring new materials. High-pressure research is an important way to obtain critical data for modern defense. The laboratory will conduct research around superhard multifunctional materials, new materials that are difficult to prepare under normal pressure, and high-pressure science. Main directions: (1) High temperature and high pressure synthesis of superhard and new functional materials. Research the physical issues and key technologies for synthesizing superhard materials under high temperature and high pressure, improve the quality of superhard materials, explore the use of high temperature and high pressure conditions to prepare new functional materials and new materials that are difficult to prepare under normal pressure, and promote the industrialization of research results. (2) Super hard multifunctional film materials. Research key preparation technologies and basic physical issues of superhard multifunctional thin film materials; develop and promote the application of superhard thin film materials in finishing tools and other aspects; study their prototype device structure and preparation technology, and explore the application of new materials in high-power optoelectronic devices and resistors Applications in high-tech fields such as radiation-resistant high-temperature semiconductors. (3) The impact of high pressure on the structure and properties of matter and high-pressure phase changes. Develop high-pressure in-situ micro-area measurement technologies such as Raman spectroscopy, X-ray diffraction, infrared spectroscopy, Brillouin scattering, and electrical measurements under high pressure, establish a theoretical system under high pressure, and explore the structure, properties, and phase changes of bulk materials and nanomaterials under high pressure. The laws provide experimental and theoretical basis for the preparation of superhard and multifunctional high-pressure phase materials. Carry out research on high voltage technology in other disciplines. Since the establishment of the laboratory, scientific research work has made significant progress: 1. High-temperature and high-pressure synthesis of superhard and new functional materials. Independently research and develop more than 20 types of high-grade diamond single crystals and special high-grade industrial diamond synthesis technologies, conduct a series of application basic research, promote the growth of the industry, and lead the development of the industry. 2. Super hard multifunctional film materials. Improved the technology and process for preparing large-sized and high-quality diamond thick films; prepared high thermal conductivity diamond film heat sinks for high-power semiconductor lasers; realized the application of diamond thick films in the field of precision machining. First to discover the superconducting properties of boron-doped diamond thick films, determine the superconducting transition temperature and zero resistance temperature; make breakthroughs in the performance calibration, energy level model and carrier transport characteristics of diamond-based broadband heterojunctions; system The growth, structure and corresponding field emission characteristics of high-hardness carbon-nitrogen (CNx) film were given in detail; the vapor phase epitaxial growth of diamond single crystal was realized, and large-sized diamond single crystal was prepared. 3. The impact of high pressure on the structure and properties of matter and high-pressure phase changes. It was discovered that metallic sodium transforms into a "transparent" wide-bandgap insulator at 2 million atmospheres. Discovered a new molecular crystal phase of iodine. Explain the presence of two new vibrational modes observed in the high-pressure in situ Raman spectra of iodine and bromine. Two intramolecular valent bonds with different bond lengths exist in the same system, which has important guiding significance for understanding molecular dissociation and the study of metallic hydrogen.
On the experimental platform for in-situ material structure analysis and performance testing under ultra-high pressure and the high-pressure theoretical calculation platform constructed in the laboratory, it was discovered that pressure can effectively improve the thermoelectric efficiency of thermoelectric materials and other new high-pressure effects; it was observed that liquids under high temperature and high pressure New phase changes such as first-order phase change and pressure-induced structural metallization phase change; reveal the physical mechanism of pressure-induced phase change that was difficult to determine in many substances in the past; realize the pressure-induced pressure-induced phase change of C60 in C60 nanorods and carbon nanotubes for the first time* **Valent bond polymerization is used to obtain new quasi-one-dimensional nanomaterials with excellent properties that are difficult to obtain by normal pressure methods. These important research progress and results have published a number of high-quality papers in journals such as Nature, PNAS, and Physical Review Letters. They have won provincial and ministerial science and technology awards for many years in a row, and obtained a number of invention patents, which have improved the scientific research capabilities of the laboratory.
The laboratory promotes open exchanges through open projects, international cooperation, visiting scholars, and hosting international conferences. Many scientific research units such as the Institute of Physics of the Chinese Academy of Sciences have undertaken open projects in the laboratory. They have maintained good long-term cooperative relations with internationally renowned research institutions such as the Carnegie Institution of Washington in the United States, and hosted international conferences such as the "International Academic Invitational Conference on High Voltage Materials". Every year, senior visiting scholars from the United States, Sweden, Germany, and South Korea come to the laboratory to attend meetings or give reports at the "Frontier Forum on Material Science" organized by the laboratory. With the strong support of the supporting unit Jilin University, the long-term goal of the laboratory is to reach the international advanced level in its main research directions and to reach the international leading level in several research fields. Academically, we have done important original work, promoted the development of the discipline, and built the laboratory into an internationally important research center for superhard multifunctional materials and high-pressure science. Promote the industrialization of scientific research results and contribute to improving the scientific and technological level of my country's superhard materials industry, enhancing international competitiveness and achieving sustainable development.