{"title":"通过缺陷工程和复合效应制备高可调氧化锌/Al2O3-BST50 复合陶瓷","authors":"Xianxin Zhang, Zengli Gao, Le Xin, Mingwei Zhang, Luchao Ren, Xin Geng, Panpan Lyu, Cuncheng Li, Hui Peng, Jiwei Zhai","doi":"10.1016/j.ceramint.2024.07.073","DOIUrl":null,"url":null,"abstract":"<p>A series of new <em>x</em>(<em>y</em>ZnO/Al<sub>2</sub>O<sub>3</sub>)-(1-<em>x</em>)Ba<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub> (<em>x</em> = 10, 20, 50 wt%, <em>y</em> = 1, 1.3, 1.5 mol) ceramics were prepared by solid-phase method. The effects of ion diffusion and compound effect on the lattice vibration and dielectric properties of Ba<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub> were studied. When ZnO and Al<sub>2</sub>O<sub>3</sub> are equimolar, the two react to form ZnAl<sub>2</sub>O<sub>4</sub>. Under the composite effect, the dielectric permittivity of Ba<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub> is effectively reduced, <em>T</em><sub><em>c</em></sub> moves to high temperature, and the tunability gradually increases. When ZnO is in excess, <em>T</em><sub><em>c</em></sub> remains basically unchanged, proving the unique role of the spinel structure. Because ZnO can fully diffuse into Ba<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub>, extremely high tunability is achieved through defect engineering. 50 wt%(ZnO/Al<sub>2</sub>O<sub>3</sub>)-50 wt%Ba<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub> achieved excellent microwave dielectric properties, with dielectric permittivity, tunability and Q value of 201, 23.6% and 368, respectively. In addition, ZnAl<sub>2</sub>O<sub>4</sub>-Ba<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub> composite ceramics were successfully prepared by directly compounding Ba<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub> with oxides, which greatly reduced energy loss.</p>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":null,"pages":null},"PeriodicalIF":5.1000,"publicationDate":"2024-07-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Preparation of Highly Tunable ZnO/Al2O3-BST50 Composite Ceramics via Defect Engineering and Composite Effect\",\"authors\":\"Xianxin Zhang, Zengli Gao, Le Xin, Mingwei Zhang, Luchao Ren, Xin Geng, Panpan Lyu, Cuncheng Li, Hui Peng, Jiwei Zhai\",\"doi\":\"10.1016/j.ceramint.2024.07.073\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>A series of new <em>x</em>(<em>y</em>ZnO/Al<sub>2</sub>O<sub>3</sub>)-(1-<em>x</em>)Ba<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub> (<em>x</em> = 10, 20, 50 wt%, <em>y</em> = 1, 1.3, 1.5 mol) ceramics were prepared by solid-phase method. The effects of ion diffusion and compound effect on the lattice vibration and dielectric properties of Ba<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub> were studied. When ZnO and Al<sub>2</sub>O<sub>3</sub> are equimolar, the two react to form ZnAl<sub>2</sub>O<sub>4</sub>. Under the composite effect, the dielectric permittivity of Ba<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub> is effectively reduced, <em>T</em><sub><em>c</em></sub> moves to high temperature, and the tunability gradually increases. When ZnO is in excess, <em>T</em><sub><em>c</em></sub> remains basically unchanged, proving the unique role of the spinel structure. Because ZnO can fully diffuse into Ba<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub>, extremely high tunability is achieved through defect engineering. 50 wt%(ZnO/Al<sub>2</sub>O<sub>3</sub>)-50 wt%Ba<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub> achieved excellent microwave dielectric properties, with dielectric permittivity, tunability and Q value of 201, 23.6% and 368, respectively. In addition, ZnAl<sub>2</sub>O<sub>4</sub>-Ba<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub> composite ceramics were successfully prepared by directly compounding Ba<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub> with oxides, which greatly reduced energy loss.</p>\",\"PeriodicalId\":267,\"journal\":{\"name\":\"Ceramics International\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":5.1000,\"publicationDate\":\"2024-07-07\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Ceramics International\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1016/j.ceramint.2024.07.073\",\"RegionNum\":2,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ceramics International","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1016/j.ceramint.2024.07.073","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Preparation of Highly Tunable ZnO/Al2O3-BST50 Composite Ceramics via Defect Engineering and Composite Effect
A series of new x(yZnO/Al2O3)-(1-x)Ba0.5Sr0.5TiO3 (x = 10, 20, 50 wt%, y = 1, 1.3, 1.5 mol) ceramics were prepared by solid-phase method. The effects of ion diffusion and compound effect on the lattice vibration and dielectric properties of Ba0.5Sr0.5TiO3 were studied. When ZnO and Al2O3 are equimolar, the two react to form ZnAl2O4. Under the composite effect, the dielectric permittivity of Ba0.5Sr0.5TiO3 is effectively reduced, Tc moves to high temperature, and the tunability gradually increases. When ZnO is in excess, Tc remains basically unchanged, proving the unique role of the spinel structure. Because ZnO can fully diffuse into Ba0.5Sr0.5TiO3, extremely high tunability is achieved through defect engineering. 50 wt%(ZnO/Al2O3)-50 wt%Ba0.5Sr0.5TiO3 achieved excellent microwave dielectric properties, with dielectric permittivity, tunability and Q value of 201, 23.6% and 368, respectively. In addition, ZnAl2O4-Ba0.5Sr0.5TiO3 composite ceramics were successfully prepared by directly compounding Ba0.5Sr0.5TiO3 with oxides, which greatly reduced energy loss.
期刊介绍：
Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties.
Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour.
Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.
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