{"title":"镧掺杂对溶胶-凝胶法制备K0.5Bi0.5TiO3陶瓷结构和光学性能的影响","authors":"Saloni Bhardwaj, Shammi Kumar, Nagesh Thakur","doi":"10.1007/s10971-025-06873-8","DOIUrl":null,"url":null,"abstract":"<div><p>Lanthanum doped K<sub>0.5</sub>(Bi<sub>1−x</sub> a<sub>x</sub>)<sub>0.5</sub>TiO<sub>3</sub> at x = 0.0, 0.1, 0.2, and 0.3 ceramics are prepared by using solution based sol-gel route. The effect of lanthanum doping on structural and optical parameters of K<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> ceramics has been investigated systematically. X-ray diffraction analysis confirmed the formation of perovskite phase crystallized in tetragonal structure (space group P4mm) and incorporation of lanthanum ions in the crystal lattice. Raman study reveals significant changes in vibrational mode of lanthanum doped KBT ceramics with increase in lanthanum ions concentrations. The various optical parameters such as optical band gap, Urbach energy, refractive index and extinction coefficient have been investigated by using UV-visible spectroscopy. The direct optical bandgap of ceramics are analysed by using Tauc’s plots and decrease with increase in lanthanum ions concentration.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":664,"journal":{"name":"Journal of Sol-Gel Science and Technology","volume":"115 3","pages":"1665 - 1676"},"PeriodicalIF":3.2000,"publicationDate":"2025-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Effect of lanthanum doping on structural and optical properties of K0.5Bi0.5TiO3 ceramics prepared by sol–gel technique\",\"authors\":\"Saloni Bhardwaj, Shammi Kumar, Nagesh Thakur\",\"doi\":\"10.1007/s10971-025-06873-8\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Lanthanum doped K<sub>0.5</sub>(Bi<sub>1−x</sub> a<sub>x</sub>)<sub>0.5</sub>TiO<sub>3</sub> at x = 0.0, 0.1, 0.2, and 0.3 ceramics are prepared by using solution based sol-gel route. The effect of lanthanum doping on structural and optical parameters of K<sub>0.5</sub>Bi<sub>0.5</sub>TiO<sub>3</sub> ceramics has been investigated systematically. X-ray diffraction analysis confirmed the formation of perovskite phase crystallized in tetragonal structure (space group P4mm) and incorporation of lanthanum ions in the crystal lattice. Raman study reveals significant changes in vibrational mode of lanthanum doped KBT ceramics with increase in lanthanum ions concentrations. The various optical parameters such as optical band gap, Urbach energy, refractive index and extinction coefficient have been investigated by using UV-visible spectroscopy. The direct optical bandgap of ceramics are analysed by using Tauc’s plots and decrease with increase in lanthanum ions concentration.</p><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>\",\"PeriodicalId\":664,\"journal\":{\"name\":\"Journal of Sol-Gel Science and Technology\",\"volume\":\"115 3\",\"pages\":\"1665 - 1676\"},\"PeriodicalIF\":3.2000,\"publicationDate\":\"2025-07-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Sol-Gel Science and Technology\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10971-025-06873-8\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Sol-Gel Science and Technology","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s10971-025-06873-8","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Effect of lanthanum doping on structural and optical properties of K0.5Bi0.5TiO3 ceramics prepared by sol–gel technique
Lanthanum doped K0.5(Bi1−x ax)0.5TiO3 at x = 0.0, 0.1, 0.2, and 0.3 ceramics are prepared by using solution based sol-gel route. The effect of lanthanum doping on structural and optical parameters of K0.5Bi0.5TiO3 ceramics has been investigated systematically. X-ray diffraction analysis confirmed the formation of perovskite phase crystallized in tetragonal structure (space group P4mm) and incorporation of lanthanum ions in the crystal lattice. Raman study reveals significant changes in vibrational mode of lanthanum doped KBT ceramics with increase in lanthanum ions concentrations. The various optical parameters such as optical band gap, Urbach energy, refractive index and extinction coefficient have been investigated by using UV-visible spectroscopy. The direct optical bandgap of ceramics are analysed by using Tauc’s plots and decrease with increase in lanthanum ions concentration.
期刊介绍：
The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.
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