{"title":"掺锌透辉石类 La2Ti2O7 陶瓷的高温电荷载流子传输行为","authors":"Wangxin Li, Liming Quan, Kaiyuan Chen, Biao Zhang, Yu Huang, Shuhang Yu, Feifei Han, Laijun Liu","doi":"10.1007/s00339-024-07973-y","DOIUrl":null,"url":null,"abstract":"<div><p>La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> ceramic has a perovskite-like structure with super-high Cuire temperature (<i>T</i><sub><i>c</i></sub> ~ 1460 ℃), which is an excellent candidate for the application as a high-temperature accelerator sensor used at beyond 1000 ℃. The high temperature electrical conductivity resulting from charge carrier transport has a major influence on the sensitivity of sensors. Here, Zn was introduced as an acceptor into La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> ceramics for high-temperature electrical properties. All the samples show pure perovskite-like structure with <i>P</i>2<sub>1</sub> space group and compact microstructure. With the introduction of Zn up to <i>x</i> = 0.08, the insulation resistance of the ceramics was enhanced more than 1000 times. Impedance spectroscopy and modulus spectroscopy were used to investigate the high-temperature transport of charged carrier. Interestingly, the acceptor doping resulted in an increasing concentration of oxygen vacancies, but a significant increase in both electrical insulation and activation energy of the ceramics was observed. The thermal activation mechanism is responsible for the high-temperature charge carrier transport. It is suggested that although the concentration of oxygen vacancies increase, Zn doping depresses the motion of oxygen vacancies in perovskite-like structure. The results provide a method to improve the insultation of high-temperature piezoelectric ceramics.</p></div>","PeriodicalId":473,"journal":{"name":"Applied Physics A","volume":null,"pages":null},"PeriodicalIF":2.5000,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"High-temperature charge carrier transportation behavior of Zn doped perovskite-like La2Ti2O7 ceramics\",\"authors\":\"Wangxin Li, Liming Quan, Kaiyuan Chen, Biao Zhang, Yu Huang, Shuhang Yu, Feifei Han, Laijun Liu\",\"doi\":\"10.1007/s00339-024-07973-y\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> ceramic has a perovskite-like structure with super-high Cuire temperature (<i>T</i><sub><i>c</i></sub> ~ 1460 ℃), which is an excellent candidate for the application as a high-temperature accelerator sensor used at beyond 1000 ℃. The high temperature electrical conductivity resulting from charge carrier transport has a major influence on the sensitivity of sensors. Here, Zn was introduced as an acceptor into La<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> ceramics for high-temperature electrical properties. All the samples show pure perovskite-like structure with <i>P</i>2<sub>1</sub> space group and compact microstructure. With the introduction of Zn up to <i>x</i> = 0.08, the insulation resistance of the ceramics was enhanced more than 1000 times. Impedance spectroscopy and modulus spectroscopy were used to investigate the high-temperature transport of charged carrier. Interestingly, the acceptor doping resulted in an increasing concentration of oxygen vacancies, but a significant increase in both electrical insulation and activation energy of the ceramics was observed. The thermal activation mechanism is responsible for the high-temperature charge carrier transport. It is suggested that although the concentration of oxygen vacancies increase, Zn doping depresses the motion of oxygen vacancies in perovskite-like structure. The results provide a method to improve the insultation of high-temperature piezoelectric ceramics.</p></div>\",\"PeriodicalId\":473,\"journal\":{\"name\":\"Applied Physics A\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":2.5000,\"publicationDate\":\"2024-10-16\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Applied Physics A\",\"FirstCategoryId\":\"4\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s00339-024-07973-y\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Physics A","FirstCategoryId":"4","ListUrlMain":"https://link.springer.com/article/10.1007/s00339-024-07973-y","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
La2Ti2O7 ceramic has a perovskite-like structure with super-high Cuire temperature (Tc ~ 1460 ℃), which is an excellent candidate for the application as a high-temperature accelerator sensor used at beyond 1000 ℃. The high temperature electrical conductivity resulting from charge carrier transport has a major influence on the sensitivity of sensors. Here, Zn was introduced as an acceptor into La2Ti2O7 ceramics for high-temperature electrical properties. All the samples show pure perovskite-like structure with P21 space group and compact microstructure. With the introduction of Zn up to x = 0.08, the insulation resistance of the ceramics was enhanced more than 1000 times. Impedance spectroscopy and modulus spectroscopy were used to investigate the high-temperature transport of charged carrier. Interestingly, the acceptor doping resulted in an increasing concentration of oxygen vacancies, but a significant increase in both electrical insulation and activation energy of the ceramics was observed. The thermal activation mechanism is responsible for the high-temperature charge carrier transport. It is suggested that although the concentration of oxygen vacancies increase, Zn doping depresses the motion of oxygen vacancies in perovskite-like structure. The results provide a method to improve the insultation of high-temperature piezoelectric ceramics.
期刊介绍:
Applied Physics A publishes experimental and theoretical investigations in applied physics as regular articles, rapid communications, and invited papers. The distinguished 30-member Board of Editors reflects the interdisciplinary approach of the journal and ensures the highest quality of peer review.