Zhiping Zhang, Hang Zhang, Feiyu Huang, Wei Wang, Hongfei Liu
{"title":"制备 Al1.6Sc0.4Mo3O12 纳米纤维及其负热膨胀特性","authors":"Zhiping Zhang, Hang Zhang, Feiyu Huang, Wei Wang, Hongfei Liu","doi":"10.1007/s10853-024-10055-2","DOIUrl":null,"url":null,"abstract":"<p>One-dimensional negative thermal expansion material has important applications in thermal expansion control and fiber toughened composite. Orthorhombic Al<sub>1.6</sub>Sc<sub>0.4</sub>Mo<sub>3</sub>O<sub>12</sub> nanofibers have been prepared by electrospinning. The phase composition, microstructure, morphology, and thermal expansion performance of the samples prepared at various temperatures were investigated. Results show that as-prepared Al<sub>1.6</sub>Sc<sub>0.4</sub>Mo<sub>3</sub>O<sub>12</sub> nanofibers are smooth and homogeneous with a fiber diameter of about 370.00 nm, but they show an amorphous structure. Orthorhombic Al<sub>1.6</sub>Sc<sub>0.4</sub>Mo<sub>3</sub>O<sub>12</sub> nanofibers can be obtained at 550 ℃ with a diameter of around 140.00 nm. With the increase of post-annealing temperatures, the crystallization of the samples was improved. However, higher post-annealing temperatures will destroy the nanofiber structure of the samples. HTXRD reveals that orthorhombic Al<sub>1.6</sub>Sc<sub>0.4</sub>Mo<sub>3</sub>O<sub>12</sub> nanofibers show anisotropic NTE in 25–700 °C. The expansion coefficients <i>α</i><sub>a</sub>, <i>α</i><sub>b</sub>, and <i>α</i><sub>c</sub> of Al<sub>1.6</sub>Sc<sub>0.4</sub>Mo<sub>3</sub>O<sub>12</sub> nanofibers are −5.05 × 10<sup>–6</sup> °C<sup>−1</sup>, 4.41 × 10<sup>–6</sup> °C<sup>−1</sup>, and −3.18 × 10<sup>–6</sup> °C<sup>−1</sup>, respectively. The <i>α</i><sub>v</sub> is −3.83 × 10<sup>–6</sup> °C<sup>−1</sup>, and the corresponding <i>α</i><sub>l</sub> is −1.28 × 10<sup>–6</sup> °C<sup>−1</sup>.</p>","PeriodicalId":645,"journal":{"name":"Journal of Materials Science","volume":null,"pages":null},"PeriodicalIF":3.5000,"publicationDate":"2024-08-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Preparation of Al1.6Sc0.4Mo3O12 nanofibers and their negative thermal expansion properties\",\"authors\":\"Zhiping Zhang, Hang Zhang, Feiyu Huang, Wei Wang, Hongfei Liu\",\"doi\":\"10.1007/s10853-024-10055-2\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<p>One-dimensional negative thermal expansion material has important applications in thermal expansion control and fiber toughened composite. Orthorhombic Al<sub>1.6</sub>Sc<sub>0.4</sub>Mo<sub>3</sub>O<sub>12</sub> nanofibers have been prepared by electrospinning. The phase composition, microstructure, morphology, and thermal expansion performance of the samples prepared at various temperatures were investigated. Results show that as-prepared Al<sub>1.6</sub>Sc<sub>0.4</sub>Mo<sub>3</sub>O<sub>12</sub> nanofibers are smooth and homogeneous with a fiber diameter of about 370.00 nm, but they show an amorphous structure. Orthorhombic Al<sub>1.6</sub>Sc<sub>0.4</sub>Mo<sub>3</sub>O<sub>12</sub> nanofibers can be obtained at 550 ℃ with a diameter of around 140.00 nm. With the increase of post-annealing temperatures, the crystallization of the samples was improved. However, higher post-annealing temperatures will destroy the nanofiber structure of the samples. HTXRD reveals that orthorhombic Al<sub>1.6</sub>Sc<sub>0.4</sub>Mo<sub>3</sub>O<sub>12</sub> nanofibers show anisotropic NTE in 25–700 °C. The expansion coefficients <i>α</i><sub>a</sub>, <i>α</i><sub>b</sub>, and <i>α</i><sub>c</sub> of Al<sub>1.6</sub>Sc<sub>0.4</sub>Mo<sub>3</sub>O<sub>12</sub> nanofibers are −5.05 × 10<sup>–6</sup> °C<sup>−1</sup>, 4.41 × 10<sup>–6</sup> °C<sup>−1</sup>, and −3.18 × 10<sup>–6</sup> °C<sup>−1</sup>, respectively. The <i>α</i><sub>v</sub> is −3.83 × 10<sup>–6</sup> °C<sup>−1</sup>, and the corresponding <i>α</i><sub>l</sub> is −1.28 × 10<sup>–6</sup> °C<sup>−1</sup>.</p>\",\"PeriodicalId\":645,\"journal\":{\"name\":\"Journal of Materials Science\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":3.5000,\"publicationDate\":\"2024-08-12\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Materials Science\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.1007/s10853-024-10055-2\",\"RegionNum\":3,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Materials Science","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s10853-024-10055-2","RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
Preparation of Al1.6Sc0.4Mo3O12 nanofibers and their negative thermal expansion properties
One-dimensional negative thermal expansion material has important applications in thermal expansion control and fiber toughened composite. Orthorhombic Al1.6Sc0.4Mo3O12 nanofibers have been prepared by electrospinning. The phase composition, microstructure, morphology, and thermal expansion performance of the samples prepared at various temperatures were investigated. Results show that as-prepared Al1.6Sc0.4Mo3O12 nanofibers are smooth and homogeneous with a fiber diameter of about 370.00 nm, but they show an amorphous structure. Orthorhombic Al1.6Sc0.4Mo3O12 nanofibers can be obtained at 550 ℃ with a diameter of around 140.00 nm. With the increase of post-annealing temperatures, the crystallization of the samples was improved. However, higher post-annealing temperatures will destroy the nanofiber structure of the samples. HTXRD reveals that orthorhombic Al1.6Sc0.4Mo3O12 nanofibers show anisotropic NTE in 25–700 °C. The expansion coefficients αa, αb, and αc of Al1.6Sc0.4Mo3O12 nanofibers are −5.05 × 10–6 °C−1, 4.41 × 10–6 °C−1, and −3.18 × 10–6 °C−1, respectively. The αv is −3.83 × 10–6 °C−1, and the corresponding αl is −1.28 × 10–6 °C−1.
期刊介绍:
The Journal of Materials Science publishes reviews, full-length papers, and short Communications recording original research results on, or techniques for studying the relationship between structure, properties, and uses of materials. The subjects are seen from international and interdisciplinary perspectives covering areas including metals, ceramics, glasses, polymers, electrical materials, composite materials, fibers, nanostructured materials, nanocomposites, and biological and biomedical materials. The Journal of Materials Science is now firmly established as the leading source of primary communication for scientists investigating the structure and properties of all engineering materials.