由于实验手段的长足进步；理论研究的进一步发展；更重要的是市场对于与日俱增的信息存储与传递的需求，近二十年来，磁电效应以及多铁体成为了研究的热点。本文探究的Fe2Mo3O8便是一种多铁性材料。 本文通过固相烧结法成功合成了Fe2Mo3O8多晶。运用XRD研究了相同反应物在不同气氛条件，如：5%H2/Ar、空气中以及真空中烧结的产物。并且探究了烧结温度对于晶体生长的影响，运用二次再结晶理论成功将其解释。得到了运用固相烧结法合成Fe2Mo3O8的最佳条件。 运用软件模拟的方法，我们对晶体结构进行了研究，将其形象化，并模拟出了Fe2Mo3O8晶体沿（001）方向观察的SADE图。通过TEM，我们从更加微观的角度对晶体进行观察，实验观察图像与软件模拟图像相符，并且计算出的晶格常数与PDF卡片一致，再一次验证了合成样品的正确性。

Because of the progress of experiment method, theory and the requirement of increasing information storage and transmission from society, which is more important, the research of magnetoelectic and multiferroic is a hot topic in recent 20 years. Fe2Mo3O8 is a kind of multiferroics. In this article we use solid state sintering to combine Fe2Mo3O8 polycrystal. And we find out the products which are growing in different atmosphere, like 5%H2/Ar, air and vacuum by x-ray diffraction. At the same time, we study the temperature influence on crystal growing and use the secondary recrystallization theory to explain the experiment successfully. Finally we find out the optimum condition of solid state sintering to combine Fe2Mo3O8. Using the simulation of computer software, we study the crystal structure and get the SADE figure from (001) direction. Using the transmission electron microscopy, we observe the crystal from a more microscopic view. The experiment result is the same as the simulation of computer, what is more, from the experiment result we can calculate the lattice constant which is the same as the PDF card. Taken together we can sure it is Fe2Mo3O8 polycrystal.