期刊論文
| 學年 | 72 |
|---|---|
| 學期 | 1 |
| 出版（發表）日期 | 1983-11-01 |
| 作品名稱 | Ferrobielastic switching in quartz at high temperatures |
| 作品名稱（其他語言） | |
| 著者 | 蕭秀美; Shiau, S.M. |
| 單位 | 淡江大學物理學系 |
| 出版者 | |
| 著錄名稱、卷期、頁數 | Ferroelectrics 50(1-4), pp.569 |
| 摘要 | Quartz is ferrobielastic with Dauphine twins differing in the orientation of the elastic compliance and piezoelectric tensor. Therefore a suitably-oriented stress can produce different strain in the two domains, causing a free energy difference between the two domain states and producing a driving force for domain reorientation and twin wall motion. Ferrobielastic twinning has been studied optically utilizing the photoelastic effect from room temperature up to 400°C. The coercive stress for ferrobielastic switching decrease with increasing temperature. The coercive stress needed to cause switchover in synthetic crystals is about 7 × 108 Pa at room temperature. Experiments at 150°C show switchover at 5·2 × 108 Pa and at 200°C about 1·9 × 108 Pa. The coercive stress data decrease monotonically with increasing temperature up to 250°C, above which the domain patterns depart radically from those observed at lower temperatures. The inverse relationship between coercive stress and temperature continued at higher temperature but with a discontinuity at 250°C separating two apparently linear segments. Beyond 400°C even very small stresses are sufficient to induce twinning and it becomes difficult to observe optically, therefore the electrical method is used to study twinning at near the α-β transition. Additional details concerning high temperature twinning will be presented at the meeting. |
| 關鍵字 | |
| 語言 | en |
| ISSN | |
| 期刊性質 | 國內 |
| 收錄於 | |
| 產學合作 | |
| 通訊作者 | |
| 審稿制度 | 否 |
| 國別 | TWN |
| 公開徵稿 | |
| 出版型式 | ,電子版 |
| 相關連結 |
機構典藏連結 ( http://tkuir.lib.tku.edu.tw:8080/dspace/handle/987654321/72658 ) |