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Вид документа : Статья из журнала
Шифр издания :
Автор(ы) : Liu Y., Jiang X., Molokeev M. S., Zhang X., Lin Z.
Заглавие : Zn3GaB6O12As and Zn4P6N12S: Isotropic zero thermal expansion materials based on the "cage-restricting" model
Место публикации : Chem. Mater. - 2022. - Vol. 34, Is. 22. - P.9915-9922. - ISSN 08974756 (ISSN), DOI 10.1021/acs.chemmater.2c01947
Примечания : Cited References: 41. - This work was supported by the National Scientific Foundation of China (grant nos 12274425, 51872297, 11974360, and 51890864) and Fujian Institute of Innovation (FJCXY18010201) in CAS. X.X.J. acknowledges the support from Youth Talent Promotion Project from China Association for Science and Technology and the CAS Project for Young Scientists in Basic Research (grant YSBR-024)
Аннотация: With the capability to keep the size invariant along all dimensions over a certain temperature range, isotropic zero thermal expansion (ZTE) materials have been attracting wide interest in many scientific and engineering fields. Herein, based on the “cage-restricting” model for the ZTE materials with β-sodalite-like structures, we design and synthesize two new isotropic ZTE materials, Zn3GaB6O12As (ZGBA) and Zn4P6N12S (ZPNS), from the molecular engineering strategies of enhancing the cage-restricting force and of increasing the rigidity of β-sodalite cages, respectively. ZGBA and ZPNS exhibit isotropic ZTE behaviors in the temperature range from 20 to 300 K, with the coefficients of thermal expansion 1.18(17)/MK and 1.37(17)/MK, respectively, both of which are lowered by ∼30–20% in comparison with their template compound Zn4B6O12S (ZBS). The mechanisms of improved isotropic ZTE in ZGBA and ZPNS are unraveled by lattice dynamic analysis and temperature-dependent crystal structure evolution. This study paves new avenues to enhance the ZTE behavior in the materials with cage-like structures and has great implication on the exploration of isotropic ZTE materials.
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