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您的检索式：作者名="J.A.Alonso"
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| 1 | 查看详情显示文摘 | A.Munoz J.A.Alonso M.T.Casais M.J.Martinez-Lope J.L.Martinez and M.T.Fernandez-Diaz | | 0，，： | 1 |
| 2 | Design,synthesis and performance of Ba-doped derivatives of SrMo_(0.9)Fe_(0.1)O_(3-δ)perovskite as anode materials in SOFCs显示文摘The oxides SrMo_(1-x)Fe_(x)O_(3-δ)(x=0.1 and 0.2)have recently been described as excellent anode materials for solid-oxide fuel cells at intermediate temperatures(IT-SOFC)with LSGM as the electrolyte.In this work we have partially replaced Sr by Ba in a compound of formula Sr_(0.9)Ba_(0.1)Mo_(0.9)Fe_(0.1)O_(3-δ),in order to expand the unit-cell size and thereby improve the ionic diffusion of O^(2-)ions through the crystal lattice.The anode materials must be stable under reducing conditions,since they work in the presence of the fuel(H_(2))at elevated temperatures.These anodes are inspired in the SrMoO_(3)perovskite,which contains Mo4+ions,stable in very reducing conditions.This novel oxide has been structurally characterized from x-ray(XRD)and neutron powder diffraction(NPD)data;the structure is defined at room temperature in the Pm-3m space group,and shows oxygen vacancies,necessary for the performance of this material as mixed ionic-electronic(MIEC)oxide.In single test cells supported on LSGM,the materials generated output powers close to 500 mW/cm^(2)at 850℃using pure H_(2)as fuel.The thermal expansion is linear,with TEC=10.93×10^(-6)K^(-1).The chemical compatibility with the LSGM electrolyte was also verified. | S.Sydyknazar V.Cascos M.T.Fernandez-Diaz J.A.Alonso | 2019 | Journal of Materiomics2019，5，2： | 1 |
| 3 | 查看详情显示文摘 | A.Munoz M.T.Casais J.A.Alonso M.J.Martinez-Lope J.L.Martinez and M.T.Fernandez-Diaz | | 0，，05： | 1 |
| 4 | Building Crystals from Clusters显示文摘Ab initio total energy calculations are used to simulate the building of equiatomic solid APballoys (A=Li, Na, K) with A4Pb4 clusters which are particularly stable in the gas phase. Theeight clusters per unit cell were drawn together by shrinking the cell in stages, and allowingfull atomic relaxation at each stage. Charged Pb4 tetrahedral units dominate the structuraland electronic properties, and these units are remarkably robust and insensitive to their alkalienvironment. The stability of the Pb4 units diminishes as we progress from K to Li and lead totheir absence in the LiPb alloy in accordance with experiment. The distance between Pb4 unitsseems to be the critical factor responsible for the structural trends, which is determined by theatomic size of the alkali. | M.J.Stottt(Department of Physics, Queen’s University, Kingston, Ontario K7L 3N6, Canada)L.M.Molina and J.A.Alonso(Departamento de Fisica Terica, Universidad de Valladolid, E-47011 Valladolid, Spain)To whom correspondence should be addressed E-mail: stott@ | 1999 | Journal of Materials Science & Technology1999，15，4： | 0 |
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