Multidimensional coupled structure-activity relationship models for replacement of SF_(6)  

作　　者：Mi Zhang Hua Hou Baoshan Wang 

机构地区：[1]College of Chemistry and Molecular Sciences,Wuhan University,Wuhan,China

出　　处：《High Voltage》2024年第2期484-494,共11页高电压（英文）

基　　金：National Key Research and Development Program of China,Grant/Award Number:2021YFB2401400。

摘　　要：Computational screening of single gases to replace SF_(6)for electrical insulation has been challenged by the difficulty in combining various mutually exclusive properties especially for dielectric performance with liquefaction and environmental properties.To reveal the inherent correlations between dielectric strength(Er),boiling point(Tb),and global warming potential(GWP)of dielectric materials,a coupled structure-activity relationship(CSAR)model has been proposed for the first time.By means of the generic descriptors,as deduced from the electrostatic potentials,and the specific descriptors,as introduced from the respective microscopic mechanisms,the complex interdependence between Er,Tb,and GWP of the insulation gases is quantitatively characterised by the 3-D coupling matrix.The coupling mechanism for the right balance of properties is uncovered in terms of the first-principle descriptors.The CSAR model outperforms the previous SAR models in predicting Er,Tb,and GWP simultaneously in a self-consistent manner.More importantly,the concept of CSAR could be extended readily to any multidimensional macroscopic properties.Novel replacement compounds have been identified tentatively to be the promising candidates to replace SF_(6)using the CSAR model.

关 键 词：properties. DIELECTRIC INSULATION 

分 类 号：TM21[一般工业技术—材料科学与工程]