Crystallization and microstructural evolution of MgO-Al2O3-SiO2-TiO2-La2O3 glass-ceramics
文献类型：期刊论文
| 作者 | Wang, Hui-Juan1,2,3; Zscheckel, Tilman3; Li, Bo-Tao1; Lin, Hui-Xing1; Bocker, Christian3; Russel, Christian3; Luo, Lan1 |
| 刊名 | JOURNAL OF MATERIALS SCIENCE
 |
| 出版日期 | 2017-02-01 |
| 卷号 | 52期号:3页码:1330-1347 |
| 英文摘要 | Crystallization and microstructure of glasses with the molar compositions 1MgO center dot 1.2Al(2)O(3)center dot 2.8SiO(2)center dot 1.2TiO(2)center dot xLa(2)O(3) (x = 0.1 and 0.4) were thermally treated at different temperatures in the range from 950 to 1250 A degrees C and then analyzed by X-ray diffraction and scanning electron microscopy, in combination with energy-dispersive X-ray spectroscopy and electron backscatter diffraction. It was found that the microstructure is first homogeneous with the precipitation of randomly distributed crystals and then indialite domains with embedded perrierite and rutile crystals are formed. For higher temperatures or prolonged times, more domains appear and expand into the bulk of the sample. Finally, the entire sample consists of the indialite domains and the boundaries that are enriched in rutile, perrierite, and magnesium aluminotitanate. Nevertheless, very distinct differences are observed between the samples with different La2O3 concentrations. For the sample with x = 0.4, the domains were detected at lower temperatures, while the quantity and size of the domains increase faster due to the promoted precipitation of indialite. For the sample with x = 0.1, in addition to the domain boundaries, secondary boundaries between the "regions" (assemblages of the domains) are observed in a larger length scale. The average size of the crystalline phases found between the "regions" is larger than that typically observed at the domain boundaries. The sizes of the crystals at the boundaries decrease with higher concentrations of La2O3, and the crystals (especially perrierite) within the domains become larger, resulting in a more homogeneous microstructure. This results in better dielectric properties, i.e., much higher quality factor for the sample with x = 0.4 in comparison to that with x = 0.1 after heat-treatment at 1150 or 1250 A degrees C. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Materials Science, Multidisciplinary |
| 研究领域[WOS] | Materials Science |
| 关键词[WOS] | MICROWAVE DIELECTRIC-PROPERTIES ; SYSTEM MGO/AL2O3/TIO2/ZRO2/SIO2 ; PHASE-TRANSFORMATION ; CORDIERITE ; BEHAVIOR ; MGO ; RESONATORS ; SEPARATION ; ADDITIVES ; FILTERS |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000389409000011 |
| 源URL | [http://ir.sic.ac.cn/handle/331005/21929]  |
| 专题 | 上海硅酸盐研究所_无机功能材料与器件重点实验室_期刊论文 |
| 作者单位 | 1.Chinese Acad Sci, Shanghai Inst Ceram, Key Lab Inorgan Funct Mat & Device, Shanghai 200050, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Univ Jena, Otto Schott Inst, D-07743 Jena, Germany |
| 推荐引用方式 GB/T 7714 | Wang, Hui-Juan,Zscheckel, Tilman,Li, Bo-Tao,et al. Crystallization and microstructural evolution of MgO-Al2O3-SiO2-TiO2-La2O3 glass-ceramics[J]. JOURNAL OF MATERIALS SCIENCE,2017,52(3):1330-1347. |
| APA | Wang, Hui-Juan.,Zscheckel, Tilman.,Li, Bo-Tao.,Lin, Hui-Xing.,Bocker, Christian.,...&Luo, Lan.(2017).Crystallization and microstructural evolution of MgO-Al2O3-SiO2-TiO2-La2O3 glass-ceramics.JOURNAL OF MATERIALS SCIENCE,52(3),1330-1347. |
| MLA | Wang, Hui-Juan,et al."Crystallization and microstructural evolution of MgO-Al2O3-SiO2-TiO2-La2O3 glass-ceramics".JOURNAL OF MATERIALS SCIENCE 52.3(2017):1330-1347. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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