English

Shanghai Institute of Optics and Mechanics has made progress in studying the structure and properties of aluminum phosphate glass

1193
2023-09-15 15:19:48
See translation

Recently, Hu Lili, a research team of the High Power Laser Unit Technology Laboratory of the Chinese Academy of Sciences Shanghai Institute of Optics and Fine Mechanics, used a method combining experiment, molecular dynamics simulation and quantitative structure property relationship analysis (QSPR) to study aluminum phosphate glass, and the related research results were published in the Journal of the American Ceramic Society.

At present, aluminum phosphate glass is widely used in many fields, including biomedical materials, optical components, sealing materials, and nuclear waste solidification. There have been many studies on the short range structure of aluminum phosphate glass through experimental techniques, but the relationship between its properties and the medium range structure is still unclear. Molecular dynamics simulation has become an effective tool for research, playing an increasingly important role in revealing the structural origins of glass properties.

In this study, researchers combined experimental and molecular dynamics simulation methods to study the effect of Al2O3 on the short and medium range structures of aluminum phosphate glass, and established its structural property model using QSPR method. The accuracy of the simulation was verified through experimental results such as Raman and synchrotron radiation.

The simulation results indicate that the P-O-P bonds present in the glass network are gradually replaced by P-O-Al bonds as the Al2O3 content changes, playing an important role in the performance changes of the glass. Meanwhile, the long chains in aluminum phosphate glass are prone to form circular structures and are concentrated in the 4 to 20 membered rings. In addition, the QSPR model was established using three different structural descriptors and successfully correlated experimental data with simulation results, demonstrating good model predictability. This method provides new ideas for predicting glass properties and designing glass components.

Figure 1 establishes a quantitative structure performance relationship model using the (a) coordination number (CN), (b) Qn, and (c) ring size of aluminum phosphate glass as structural inputs. The columns from left to right show the relationship between the structural descriptor Fnet and experimental density, hardness, glass transition temperature, and thermal expansion coefficient, respectively.

Source: Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences

Related Recommendations
  • Sweden's powerful laser system generates ultra short laser pulses

    For the first time, researchers at Umeå University, Sweden, have demonstrated the full capabilities of their large-scale laser facility. The team reports generating a combination of ultrashort laser pulses, extreme peak power, and precisely controlled waveforms that make it possible to explore the fastest processes in nature.Umeå’s laser is 11 m long and generates very short pulses László Vei...

    08-20
    See translation
  • Research has found that inorganic perovskite materials are easy to prepare and process, making them suitable for manufacturing lasers

    According to research from Busan National University, inorganic perovskite materials are easy to prepare and process, making them suitable for manufacturing lasers.The perovskite of interest is CsPbBr3, which must form "nanosheets" within the specific structure invented by the Busan team to obtain sufficient laser gain.It is not that the laser has been achieved, as the research project aims to cha...

    2024-01-04
    See translation
  • New discoveries bring progress in photon calculation

    International researchers led by Philip Walther from the University of Vienna have made significant breakthroughs in the field of quantum technology, successfully demonstrating quantum interference between multiple single photons using a new resource-saving platform. This work, published in Science Advances, represents a significant advancement in the field of quantum computing and paves the way f...

    2024-04-27
    See translation
  • Filatek: Leading the Development of Laser, Shining "Additive Prince"

    In recent years, the field of laser technology has received widespread attention from the outside world. At that time, the Munich Shanghai Electronic Production Equipment Exhibition was successfully held in Shanghai, and Suzhou Feilaitek Laser Technology Co., Ltd. (hereinafter referred to as "Feilaitek"), a leading enterprise in the field of industrial laser 3D dynamic focusing systems, appeared a...

    2024-04-12
    See translation
  • Laser technology helps wafer bonding, creating a cutting-edge laser system production factory

    Recently, Coherent LaserSystems, the global leader in laser and photon solutions, and Fraunhofer IZM-ASSID jointly announced that they have reached a strategic partnership to develop and optimize alternative bonding and debonding technologies for advanced CMOS and heterogeneous integrated applications (including quantum computing), in which laser technology plays a crucial role. It is reported t...

    2024-06-19
    See translation