Claudia Kofahl , Lars Dörrer , Steffen Ganschow , Hendrik Wulfmeier , Holger Fritze , Harald Schmidt
{"title":"Li(Nb,Ta)O3单晶中氢和锂示踪剂扩散系数与氢浓度的关系","authors":"Claudia Kofahl , Lars Dörrer , Steffen Ganschow , Hendrik Wulfmeier , Holger Fritze , Harald Schmidt","doi":"10.1016/j.ssi.2025.116968","DOIUrl":null,"url":null,"abstract":"<div><div>For LiNb<sub>1-x</sub>Ta<sub>x</sub>O<sub>3</sub> single crystals, the ion diffusivities of the species Li and H (as an impurity) have strong influence on the overall conductivity at temperatures below 600 °C. We investigated the diffusion of H and Li in LiNbO<sub>3</sub>, LiTaO<sub>3</sub>, and LiNb<sub>0.15</sub>Ta<sub>0.85</sub>O<sub>3</sub> single crystals as a function of H concentration over two order of magnitude at 510 °C. The hydrogen diffusion experiments were realized by isotope exchange of deuterium (D) and hydrogen (H) in a gaseous D<sub>2</sub>O atmosphere and infra-red spectroscopy. The lithium diffusion experiments were done by <sup>6</sup>Li/<sup>7</sup>Li tracer exchange and Secondary Ion Mass Spectrometry. The diffusivities of both types of species decrease only slightly with increasing hydrogen concentration between 5 × 10<sup>16</sup> cm<sup>−3</sup> and 3 × 10<sup>18</sup> cm<sup>−3</sup> by a maximum factor of two to three for each type of diffusor. We suggest that the increased incorporation of hydrogen up to a concentration of about 3 × 10<sup>18</sup> cm<sup>−3</sup> into the lattice modifies only very slightly the migration of both species.</div></div>","PeriodicalId":431,"journal":{"name":"Solid State Ionics","volume":"429 ","pages":"Article 116968"},"PeriodicalIF":3.3000,"publicationDate":"2025-07-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Hydrogen and lithium tracer diffusivities as a function of hydrogen concentration in Li(Nb,Ta)O3 single crystals\",\"authors\":\"Claudia Kofahl , Lars Dörrer , Steffen Ganschow , Hendrik Wulfmeier , Holger Fritze , Harald Schmidt\",\"doi\":\"10.1016/j.ssi.2025.116968\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div>For LiNb<sub>1-x</sub>Ta<sub>x</sub>O<sub>3</sub> single crystals, the ion diffusivities of the species Li and H (as an impurity) have strong influence on the overall conductivity at temperatures below 600 °C. We investigated the diffusion of H and Li in LiNbO<sub>3</sub>, LiTaO<sub>3</sub>, and LiNb<sub>0.15</sub>Ta<sub>0.85</sub>O<sub>3</sub> single crystals as a function of H concentration over two order of magnitude at 510 °C. The hydrogen diffusion experiments were realized by isotope exchange of deuterium (D) and hydrogen (H) in a gaseous D<sub>2</sub>O atmosphere and infra-red spectroscopy. The lithium diffusion experiments were done by <sup>6</sup>Li/<sup>7</sup>Li tracer exchange and Secondary Ion Mass Spectrometry. The diffusivities of both types of species decrease only slightly with increasing hydrogen concentration between 5 × 10<sup>16</sup> cm<sup>−3</sup> and 3 × 10<sup>18</sup> cm<sup>−3</sup> by a maximum factor of two to three for each type of diffusor. We suggest that the increased incorporation of hydrogen up to a concentration of about 3 × 10<sup>18</sup> cm<sup>−3</sup> into the lattice modifies only very slightly the migration of both species.</div></div>\",\"PeriodicalId\":431,\"journal\":{\"name\":\"Solid State Ionics\",\"volume\":\"429 \",\"pages\":\"Article 116968\"},\"PeriodicalIF\":3.3000,\"publicationDate\":\"2025-07-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Solid State Ionics\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S0167273825001870\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"CHEMISTRY, PHYSICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solid State Ionics","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0167273825001870","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"CHEMISTRY, PHYSICAL","Score":null,"Total":0}
Hydrogen and lithium tracer diffusivities as a function of hydrogen concentration in Li(Nb,Ta)O3 single crystals
For LiNb1-xTaxO3 single crystals, the ion diffusivities of the species Li and H (as an impurity) have strong influence on the overall conductivity at temperatures below 600 °C. We investigated the diffusion of H and Li in LiNbO3, LiTaO3, and LiNb0.15Ta0.85O3 single crystals as a function of H concentration over two order of magnitude at 510 °C. The hydrogen diffusion experiments were realized by isotope exchange of deuterium (D) and hydrogen (H) in a gaseous D2O atmosphere and infra-red spectroscopy. The lithium diffusion experiments were done by 6Li/7Li tracer exchange and Secondary Ion Mass Spectrometry. The diffusivities of both types of species decrease only slightly with increasing hydrogen concentration between 5 × 1016 cm−3 and 3 × 1018 cm−3 by a maximum factor of two to three for each type of diffusor. We suggest that the increased incorporation of hydrogen up to a concentration of about 3 × 1018 cm−3 into the lattice modifies only very slightly the migration of both species.
期刊介绍:
This interdisciplinary journal is devoted to the physics, chemistry and materials science of diffusion, mass transport, and reactivity of solids. The major part of each issue is devoted to articles on:
(i) physics and chemistry of defects in solids;
(ii) reactions in and on solids, e.g. intercalation, corrosion, oxidation, sintering;
(iii) ion transport measurements, mechanisms and theory;
(iv) solid state electrochemistry;
(v) ionically-electronically mixed conducting solids.
Related technological applications are also included, provided their characteristics are interpreted in terms of the basic solid state properties.
Review papers and relevant symposium proceedings are welcome.