Inorganic aerogels with low density,high porosity,large specific surface area,and superior mechanical properties are excellent candidate materials in fields such as thermal management,energy,catalysis,and biomedical a...Inorganic aerogels with low density,high porosity,large specific surface area,and superior mechanical properties are excellent candidate materials in fields such as thermal management,energy,catalysis,and biomedical applications.A comprehensive overview of existing elastic inorganic aerogels is provided,covering their structural units,preparation methods,mechanical performances,and applications.Meanwhile,based on the constituent building blocks and microstructures,a detailed analysis of the mechanical properties and guidelines for elastic design of aerogels is presented.Concluding with a succinct summary of prospective developmental direction,this review deliberates on the challenges and potential opportunities of elastic inorganic aerogels,with the intent of providing a versatile platform for designing new types of elastic inorganic aerogels for various applications.展开更多
Cross-section data of the^(185)Re(n,2n)^(184)mRe,^(185)Re(n,2n)^(184)gRe,^(185)Re(n,α)182m1+m2+gTa,^(187)Re(n,2n)^(186)g,(m)Re,^(187)Re(n,α)^(184)Ta,and^(187)Re(n,p)^(187)W reactions were measured at four neutron en...Cross-section data of the^(185)Re(n,2n)^(184)mRe,^(185)Re(n,2n)^(184)gRe,^(185)Re(n,α)182m1+m2+gTa,^(187)Re(n,2n)^(186)g,(m)Re,^(187)Re(n,α)^(184)Ta,and^(187)Re(n,p)^(187)W reactions were measured at four neutron energies,namely 13.5,14.1,14.4,and 14.8 MeV,by means of the activation technique,relative to the reference cross-section values of the 93Nb(n,2n)92mNb reaction.The neutrons were generated from the T(d,n)4He reaction at the K-400 Neutron Generator at China Academy of Engineering Physics.The inducedγactivities were measured using a high-resolutionγ-ray spectrometer equipped with a coaxial high-purity germanium detector.The excitation functions of the six above-mentioned nuclear reactions at neutron energies from the threshold to 20 MeV were calculated by adopting the nuclear theoretical model program system Talys-1.9 with the relevant parameters properly adjusted.The measured cross sections were analyzed and compared with previous experiments conducted by other researchers,and with the evaluated data of BROND-3.1,ENDF/B-VIII.0,JEFF-3.3,and the theoretical values based on Talys-1.9.The new measured results agree with those of previous experiments and the theoretical excitation curve at the corresponding energies.The theoretical excitation curves based on Talys-1.9 generally match most of experimental data well.展开更多
The cross sections for the 94Zr(n,d*)93m+gY,96Zr(n,γ)97Z,96Zr(n,2n)95Zr,90Zr(n,α)87mSr,94Zr(n,α)91Sr,90Zr(n,p)90mY,92Zr(n,p)92Y,and 94Zr(n,p)94Y reactions have been measured in the neutron energy range of 13.5-14.8...The cross sections for the 94Zr(n,d*)93m+gY,96Zr(n,γ)97Z,96Zr(n,2n)95Zr,90Zr(n,α)87mSr,94Zr(n,α)91Sr,90Zr(n,p)90mY,92Zr(n,p)92Y,and 94Zr(n,p)94Y reactions have been measured in the neutron energy range of 13.5-14.8 MeV by means of the activation technique.The neutrons were produced via the D-T reaction.A high-purity germanium detector with high energy resolution was used to measure the inducedγactivities.In combination with the nuclear reaction theoretical models,the excitation curves of the above-mentioned eight nuclear reactions within the incident neutron energy range from the threshold to 20 MeV were obtained by adopting the nuclear theoretical model program system Talys-1.9.The resulting experimental cross sections were analyzed and compared with the experimental data from published studies.Calculations were performed using Talys-1.9 and are in agreement with our experimental results,previous experimental values,as well as results of the theoretical excitation curves at the corresponding energies.The theoretical excitation curves generally match the experimental data well.展开更多
文摘Inorganic aerogels with low density,high porosity,large specific surface area,and superior mechanical properties are excellent candidate materials in fields such as thermal management,energy,catalysis,and biomedical applications.A comprehensive overview of existing elastic inorganic aerogels is provided,covering their structural units,preparation methods,mechanical performances,and applications.Meanwhile,based on the constituent building blocks and microstructures,a detailed analysis of the mechanical properties and guidelines for elastic design of aerogels is presented.Concluding with a succinct summary of prospective developmental direction,this review deliberates on the challenges and potential opportunities of elastic inorganic aerogels,with the intent of providing a versatile platform for designing new types of elastic inorganic aerogels for various applications.
基金Supported by National Natural Science Foundation of China(11605099,11575090)。
文摘Cross-section data of the^(185)Re(n,2n)^(184)mRe,^(185)Re(n,2n)^(184)gRe,^(185)Re(n,α)182m1+m2+gTa,^(187)Re(n,2n)^(186)g,(m)Re,^(187)Re(n,α)^(184)Ta,and^(187)Re(n,p)^(187)W reactions were measured at four neutron energies,namely 13.5,14.1,14.4,and 14.8 MeV,by means of the activation technique,relative to the reference cross-section values of the 93Nb(n,2n)92mNb reaction.The neutrons were generated from the T(d,n)4He reaction at the K-400 Neutron Generator at China Academy of Engineering Physics.The inducedγactivities were measured using a high-resolutionγ-ray spectrometer equipped with a coaxial high-purity germanium detector.The excitation functions of the six above-mentioned nuclear reactions at neutron energies from the threshold to 20 MeV were calculated by adopting the nuclear theoretical model program system Talys-1.9 with the relevant parameters properly adjusted.The measured cross sections were analyzed and compared with previous experiments conducted by other researchers,and with the evaluated data of BROND-3.1,ENDF/B-VIII.0,JEFF-3.3,and the theoretical values based on Talys-1.9.The new measured results agree with those of previous experiments and the theoretical excitation curve at the corresponding energies.The theoretical excitation curves based on Talys-1.9 generally match most of experimental data well.
基金Supported by the National Natural Science Foundation of China(11575090)。
文摘The cross sections for the 94Zr(n,d*)93m+gY,96Zr(n,γ)97Z,96Zr(n,2n)95Zr,90Zr(n,α)87mSr,94Zr(n,α)91Sr,90Zr(n,p)90mY,92Zr(n,p)92Y,and 94Zr(n,p)94Y reactions have been measured in the neutron energy range of 13.5-14.8 MeV by means of the activation technique.The neutrons were produced via the D-T reaction.A high-purity germanium detector with high energy resolution was used to measure the inducedγactivities.In combination with the nuclear reaction theoretical models,the excitation curves of the above-mentioned eight nuclear reactions within the incident neutron energy range from the threshold to 20 MeV were obtained by adopting the nuclear theoretical model program system Talys-1.9.The resulting experimental cross sections were analyzed and compared with the experimental data from published studies.Calculations were performed using Talys-1.9 and are in agreement with our experimental results,previous experimental values,as well as results of the theoretical excitation curves at the corresponding energies.The theoretical excitation curves generally match the experimental data well.
