典型文献
Compositional dependence of thermophysical properties in binary alkaline earth borate melts:Insights from structure in short-range and intermediate-range order
文献摘要：
In this work,the thermal conductivity of alkaline earth borate melts was measured using hot-wire method from 1323 to 1623 K,and the thermal diffusivity was extrapolated from the thermal conductivity and heat capacity.The compositional dependence of thermophysical properties was interpreted accord-ing to the structure in short-range and intermediate-range order.Based on the Raman spectroscopy,X-ray photoelectron spectroscopy(XPS),and 11B magic-angle spinning nuclear magnetic resonance(MAS-NMR)spectra,modifier cation with higher field strength prefers the formation of non-bridging oxygens(NBOs)for the charge compensation at high BO,.5/MO ratios.A lower amount of covalent bond and greater iso-lation of large borate groups lead to a lower thermal conductivity in calcium borate melt compared with strontium and barium borates.But the large size of Ba2+encounters difficulty in fitting around Bl4l-0-Bl4 linkages inside the overcrowded large borate groups when BO15/BaO=2.5,promoting the formation of NBOs on the edge of borate groups for the charge compensation of modifier cations and leading to the decline in the thermal conductivity.Thermal conductivity plays a major role in regulating the ther-mal diffusivity at a given temperature since the compositional dependence of volumetric heat capacity is relatively weak compared with that of thermal conductivity.
文献关键词：
中图分类号：
作者姓名：
Jian Yang;Il Sohn
作者机构：
Department of Materials Science and Engineering,Yonsei University,Seoul,120749,Korea;State Key Laboratory of Cemented Carbide,Zhuzhou 412000,China
文献出处：
引用格式：
[1]Jian Yang;Il Sohn-.Compositional dependence of thermophysical properties in binary alkaline earth borate melts:Insights from structure in short-range and intermediate-range order)[J].材料科学技术（英文版）,2022(36):195-203
A类：
NBOs,Ba2+encounters,Bl4l,Bl4,overcrowded,BO15
B类：
Compositional,dependence,thermophysical,properties,binary,alkaline,earth,melts,Insights,from,structure,short,range,intermediate,order,this,work,thermal,conductivity,was,measured,using,wire,method,diffusivity,extrapolated,heat,capacity,compositional,interpreted,accord,Based,Raman,spectroscopy,ray,photoelectron,XPS,11B,magic,angle,spinning,nuclear,magnetic,resonance,MAS,NMR,spectra,modifier,higher,field,strength,prefers,formation,bridging,oxygens,charge,compensation,MO,ratios,lower,amount,covalent,bond,greater,iso,lation,large,groups,calcium,compared,strontium,barium,borates,But,size,difficulty,fitting,around,linkages,inside,when,BaO,promoting,edge,cations,leading,decline,Thermal,plays,major,role,regulating,given,temperature,since,volumetric,relatively,weak,that
AB值：
0.505035
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