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首页> 外文期刊>Crystallography reports >Ionic Conductivity of Cold-Pressed Ceramics from Grinding of R_(0.95)M_(0.05)F_(2.95) Solid Electrolytes (R = La, Nd; M = Ca, Sr, Ba) Synthesized by Reaction in Melt
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Ionic Conductivity of Cold-Pressed Ceramics from Grinding of R_(0.95)M_(0.05)F_(2.95) Solid Electrolytes (R = La, Nd; M = Ca, Sr, Ba) Synthesized by Reaction in Melt

机译：通过熔解反应合成R_（0.95）M_（0.05）F_（2.95）固体电解质（R = La，Nd; M = Ca，Sr，Ba）研磨而成的冷压陶瓷离子电导率

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摘要

Cold-pressed ceramics of fluorine-conducting solid electrolytes La_(1 – y)M_yF_(3 – y) (M = Ca, Sr, Ba) and Nd_(1 – y)Ca_yF_(3 – y) with y = 0.95 have been synthesized in a melt of RF_3 (R = La, Nd) and MF_2 components in a fluorinating atmosphere and ground in a ball mill. The as-prepared ceramics require annealing, during which their porosity decreases and the conductivity is stably increased (by a factor of 250 for the R_(1 – y)M_yF_(3 – y) composition at 293 K). The Nd_(0.95)Ca_(0.05)F_(2.95) and Nd_(0.95)Ca_(0.05)F_(2.95) compositions have a maximum ionic conductivity σ(293 K) ～ 5 × 10~(–6) Sm/cm. This value is larger (by a factor of about 10) than σ (293 K) for the R_(1 – y)M_yF_(3 – y) ceramics of tysonite phases prepared by mechanochemical synthesis with the cold pressing of reaction products.
机译：含氟固体电解质La_（1-y）M_yF_（3-y）（M = Ca，Sr，Ba）和Nd_（1-y）Ca_yF_（3-y）y = 0.95的冷压陶瓷在氟化气氛中在RF_3（R = La，Nd）和MF_2组分的熔体中合成并在球磨机中研磨。所制备的陶瓷需要退火，在此期间其孔隙率降低且电导率稳定增加（对于293 K下的R_（1- y）M_yF_（3- y）成分，其系数提高了250倍）。 Nd_（0.95）Ca_（0.05）F_（2.95）和Nd_（0.95）Ca_（0.05）F_（2.95）组成的最大离子电导率σ（293 K）〜5×10〜（–6）Sm / cm。该值比通过机械化学合成和冷压反应产物制备的钛黄铁矿相的R_（1-y）M_yF_（3-y）陶瓷的σ（293 K）大（约10倍）。

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