典型文献
A new method of preparing NdB6 ultra-fine powders
文献摘要：
Combustion synthesis method was used to prepare NdB6 ultra-fine powders with B2O3,Nd2O3 and Mg powders as the raw materials.The basic thermody-namic data of NdB6 were estimated.The standard forma-tion heat of NdB6 is-357.48 kJ·mol-1.The values of the heat capacity and the standard entropy are 96.87 and 86.60 J·K-1·mol-1,respectively.The adiabatic tempera-ture of the reaction is 2726 K,which is higher than the thermodynamic criterion of 1800 K.This indicates that the combustion synthesis reaction of the B2O3-Nd2O3-Mg system could spontaneously take place by itself to generate NdB6.The NdB6 powders were characterized by X-ray diffractometer(XRD),scanning electron microscopy(SEM)and differential scanning calorimetry-thermo-gravimetry(DSC-TG).The results indicate that the com-bustion products consist of NdB6,MgO,and a few Mg3B2O6 and Nd2B2O6.The leached products consist of single NdB6 phase,and its purity is 98.6 wt％.When the sample preparation pressure is 20 MPa,the average parti-cle size of NdB6 powders is less than 500 nm.The antioxidant ability of NdB6 is very strong,which is oxi-dized step by step.The apparent activation energies of the oxidation reactions are 986.14 and 313.83 kJ·mol-1,respectively.In addition,the reaction orders are 4.10 and 3.75,respectively.
文献关键词：
中图分类号：
作者姓名：
Zhi-He Dou;Ting-An Zhang;Shi-Gang Fan;Qiu-Yang Huang;Jin-Liang Zhang;Hong-Yu Xiao;Nan Fu
作者机构：
Key Laboratory for Ecological Metallurgy of Multimetallic Mineral(Ministry of Education),Northeastern University,Shenyang 110819,China
文献出处：
引用格式：
[1]Zhi-He Dou;Ting-An Zhang;Shi-Gang Fan;Qiu-Yang Huang;Jin-Liang Zhang;Hong-Yu Xiao;Nan Fu-.A new method of preparing NdB6 ultra-fine powders)[J].稀有金属（英文版）,2022(07):2363-2369
A类：
NdB6,Mg3B2O6,Nd2B2O6
B类：
new,method,preparing,ultra,fine,powders,Combustion,synthesis,was,used,prepare,B2O3,Nd2O3,raw,materials,basic,data,were,estimated,standard,forma,heat,kJ,values,capacity,entropy,respectively,adiabatic,tempera,ture,which,higher,than,thermodynamic,criterion,This,indicates,that,combustion,system,could,spontaneously,take,place,by,itself,generate,characterized,ray,diffractometer,scanning,electron,microscopy,differential,calorimetry,gravimetry,DSC,results,products,consist,MgO,few,leached,single,phase,purity,wt,When,sample,preparation,pressure,average,parti,cle,size,less,antioxidant,ability,very,strong,dized,step,apparent,activation,energies,oxidation,reactions,In,addition,orders
AB值：
0.487375
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