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氟离子半径小,仅带一个负电荷;LaF_3中弱的共价键结合以及晶格中空位缺陷,使其表现出高的离子导电性能。有关LaF_3气敏元件的氧敏性质已有不少报道。属六方氟铈镧矿型结构的三氟化物掺杂适量的碱土金属或碱金属氟化物可提高其离子导电率。任玉芳等人研究了数种稀土复合氟化物元件的氧敏性质。掺杂PbF_2的复合稀土复化物的
Fluoride ions with a small radius, with only a negative charge; LaF_3 weak covalent bonding and lattice vacancy defects, it showed high ionic conductivity. There are many reports on the oxygen-sensitive properties of LaF_3 gas sensors. Trifluoroaluminite is a hexafluorophosphate structure doped with an appropriate amount of alkaline earth metal fluoride or alkali metal fluoride can improve its ionic conductivity. Ren Yufang et al. Studied the oxygen-sensitive properties of several rare earth composite fluoride components. Doped PbF_2 composite rare earth compound