| Li_(0.025)Na_(0.0975)NbO_3的低温热电性及其测量 |
| |
| 引用本文： | 张沛霖,钟维烈,赵焕绥,李翠平,陈焕矗,陈福生,宋永远.Li_(0.025)Na_(0.0975)NbO_3的低温热电性及其测量[J].山东大学学报(理学版),1989(2). |
| |
| 作者姓名： | 张沛霖 钟维烈 赵焕绥 李翠平 陈焕矗 陈福生 宋永远 |
| |
| 作者单位： | 山东大学物理系，山东大学物理系，山东大学实验中心，山东大学实验中心，山东大学晶体材料研究所，山东大学晶体材料研究所，山东大学晶体材料研究所 |
| |
| 摘 要： | 在300K至20K的温废范围内,研究了Li_(0.025)Na_(0.975)NbO_3晶体的热电性。在降温和升温过程中,热电系数分别在180K附近和260K附近显示峰值。这表示晶体中发生了低温相变而且该相变有很大的热滞(约80K)。观测了热电电荷随时间的变化。在降温和升温过程中,热电响应分别在180K附近和260K附近随时间改变极性。这一现象被认为是相变过程中两相共存的结果。
|
| 关 键 词： | 热电响应 铌酸锂钠晶体 |
LOW TEMPERATURE PYROELECTRIC PROPERTIES OF Li_(0.025) Na_(0.975) NbO_3 AND THEIR MEASUREMENT |
| |
| Zhang Peilin,Zhong Weilie.LOW TEMPERATURE PYROELECTRIC PROPERTIES OF Li_(0.025) Na_(0.975) NbO_3 AND THEIR MEASUREMENT[J].Journal of Shandong University,1989(2). |
| |
| Authors: | Zhang Peilin Zhong Weilie |
| |
| Abstract: | Pyroelectric properties of Li_(0.025) Nb_(0.975) NbO_3 crystals have been investigated in the temperature range from, 300K to 20K. The pyroelectric coefficient shows a peak at about 180K on cooling and at about 260K on heating. This is indicative of a low temperature phase transition with a large thermal hysteresis (about 80K). The pyroelectric time response has been observed. It changes its polarity with time at about 180K on cooling and at about 260K on heating. This phenomenon is attributed to the coexistence of two phases in the process of phase transition. |
| |
| Keywords: | Pyroelectric response Lithium-Sodium Niobate crystals |
| 本文献已被 CNKI 等数据库收录！ |
