硅锌矿结晶釉的可控析晶动力学研究

Willemite crystalline art glaze is very famous for its large and different shape crystal flowers precipitated in the glaze melt. With the upgrading of the traditional ceramic industry, it is urgent to investigate the crystallization mechanism of the crystalline glaze in detail. In this project, willemite crystalline was chosen as the research subject. In order to explore the controllable crystallization kinetics, the relationships between the homogeneous/heterogeneous phase nucleation, primary/secondary nucleation and positioning/non-positioning nucleation will be investigated. The relationships among the crystal structure, defects, growth morphology and conditions in the glaze melt will be also explored. Besides, in order to achieve controllable shape, coloring, process and dynamics，we will reveal controllable crystallization mechanism in willemite crystalline glaze. Meanwhile, combining with the numerical simulation, this proposal will establish the crystal growth kinetics model to explain the issues of crystal growth interface, melt structure near the interface, the quality of the interface, heat transport and interfacial reaction. Therefore, the successful implement of the project will provide new ideas for solving the key technical problems in the traditional ceramic industry and possess significant theoretical and applied value.

硅锌矿结晶釉是一种名贵的艺术结晶釉，它以在釉熔体中析出大朵晶花且形状各异而著称。随着我国传统陶瓷产业技术的升级换代，要求从机理上解决影响技术进步的本质因素，因而对结晶釉的析晶机理的研究显得尤为迫切。本项目以硅锌矿结晶釉为研究对象，旨在探索和发现其可控析晶的动力学规律。项目拟通过研究釉熔体中均相成核与非均相成核、一次成核与二次成核、定位成核与非定位成核之间的关系；硅酸锌在釉熔体中的晶体结构、晶体缺陷、晶体生长形态、晶体生长条件四者之间的关系；在原子分子层次上晶体生长界面和界面附近熔体结构，界面的质、热输运和界面反应等问题，达到对硅锌矿晶体的形位可控、呈色可控、过程可控、动力学可控，揭示硅锌矿结晶釉的可控析晶机理，并结合数值模拟，建立该体系下的晶体生长动力学模型。项目的成功实施将为我国传统陶瓷行业的关键技术问题的解决提供新的思路，具有重要的理论意义和应用价值。

采用钠长石，石英，ZnO，石灰石，滑石，高岭土等作为原料，确定了硅酸锌结晶釉的最优配方，研究了硅酸锌结晶釉的结晶过程的影响因素，通过控制工艺条件，能够制备出晶花分布均匀、晶花大小稳定的硅酸锌结晶釉样品。研究了硅酸锌晶体在釉熔体中析晶过程，建立了相应的热力学-动力学模型，实现了硅酸锌结晶釉的可控生长。研究了晶种对于硅酸锌晶化过程的影响，确定了种子诱导结晶釉中硅酸锌晶化机制。研究了着色剂（如MnO2，Co2+等）对硅酸锌结晶釉的析晶过程的影响，建立了其析晶过程的热力学模型，能够制备出具有不同色泽、结构和大小的结晶釉样品，并对其结晶过程进行了深入分析。同时将相应的理论模型进一步推广，研究了不同制备因素对钛酸钡纳米晶体微观结构的影响，确定了钛酸钡纳米晶体的结晶生长机理，以期实现钛酸钡纳米晶体晶化过程的可控性。