-
为了获得性能更为稳定的ZnO压敏电阻, 研究了含有Ga掺杂的ZnO压敏电阻的稳定特性, 对所获得的实验样品的微观结构和电气特性进行了电子显微镜扫描测试、电压-电流非线性特性测试、电容-电压特性测试、X-射线衍射谱测试、能谱扫描测试、介质损耗测试及交流加速老化测试. 实验结果表明, 随着Ga掺杂量的进一步增加, Ga离子占据了ZnO晶格上的空位, 增加了界面态密度, 提高了肖特基势垒高度, 一方面降低了 ZnO压敏电阻的泄漏电流密度, 另一方面抑制了耗尽层中自由电子的迁移, 提高了ZnO压敏电阻在高荷电率环境下的稳定特性. Al离子固溶到ZnO晶格当中, 产生大量的自由电子, 降低了ZnO晶粒的电阻率, 从而有效降低了ZnO压敏电阻在通过大电流时的残压比. 当Ga的掺杂摩尔分数达到0.6%时, 泄漏电流密度为0.84 μA/cm 2, 残压比为1.97, 非线性系数为66, 其肖特基势垒高度为1.81 eV. 在115 ℃环境下, 对试验样品施加87% E 1 mA, 89% E 1 mA和91% E 1 mA的交流加速老化电压, 老化时间为1000 h, 老化系数分别为0.394, 0.437和0.550. 此研究将有助于进一步提高ZnO避雷器的保护水平, 实现深度限制电网过电压, 提高电力系统的安全稳定性.The insulation level of power equipment in power system is based on the overvoltage protection level of metal oxide arrester represented by zinc oxide valve blade. Owing to its superior nonlinear voltage current characteristics and surge energy absorption capacity, ZnO varistor is widely used as the core component of power system arrester. The electrical characteristics of ZnO varistors are determined by their complex microstructures and grain boundary characteristics. Therefore, to further improve the insulation level of power grid equipment, doping is required to further improve the grain boundary characteristics of ZnO varistors. In order to obtain more stable ZnO varistors, the stability characteristics of Ga doped ZnO varistors are investigated. The microstructural and electrical characteristics of the obtained experimental samples are tested by scanning electron microscope, voltage current nonlinear characteristics, capacitance voltage characteristics, X-ray diffraction spectrum, energy spectrum scanning, dielectric loss, and AC acceleration aging. The experimental results show that with the further increase of gallium doping, gallium ions occupy the vacancies on the zinc oxide lattice, increasing the interface state density, and improving the Schottky barrier height. On the one hand, the leakage current density of ZnO varistor is reduced, on the other hand, the migration of free electrons in the depletion layer is suppressed, and the stability of ZnO varistor in the high charge rate environment is improved. Aluminum ions are dissolved into the ZnO lattice to generate a large number of free electrons, thereby reducing the resistivity of ZnO grains, which can effectively reduce the residual voltage ratio of ZnO varistor when large current passes through it. When the doping amount of Ga reaches 0.6%, the leakage current is 0.84 μA/cm 2, the residual voltage ratio is 1.97, the nonlinear coefficient is 66, and the Schottky barrier height is 1.81 eV. At 115 ℃, AC accelerated aging voltages of 87% E 1 mA, 89% E 1 mAand 91% E 1 mAare applied to the test sample separately. The aging time is 1000 h, and the aging coefficients are 0.394, 0.437 and 0.550 separately. This research will help to further improve the protection level of zinc oxide surge arresters, achieving the deep limitation of grid overvoltage, and improving the security and stability of power systems.
-
Keywords:
- ZnO varistor/
- aging stability/
- electrical properties/
- charge rate
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] -
样品编号 Ga content/% d/μm E1 mA/(V·mm–1) JL/(μA·cm–2) α Nd/(1023m–3) Ni/(1016m–2) $ {\phi _{\text{b}}} $/eV K Kt 老
化
前#1 0 8.2 373.1 1.76 54 0.87 1.40 1.45 2.35 — #2 0.2 7.9 423.2 1.34 57 0.92 1.51 1.60 2.17 — #3 0.4 7.7 440.4 0.89 63 1.07 1.64 1.62 1.99 — #4 0.6 7.4 454.4 0.84 66 1.13 1.78 1.81 1.97 — #5 0.8 7.3 478.5 1.12 61 1.25 1.75 1.58 2.14 — 老
化
后#4-87% 436.3 1.12 61 1.26 1.77 1.60 — 0.394 变化率 –3.98% 33.30% –7.60% 11.50% –0.56% –11.60% — — #4-89% 427.2 1.15 58 1.29 1.74 1.51 — 0.437 变化率 –5.99% 36.90% –12.10% 14.16% –2.25% –16.57% — — #4-91% 418.1 1.23 55 1.34 1.69 1.38 — 0.550 变化率 –7.99% 46.40% –16.70% 18.58% –5.06% –23.76% — — 
下载:
导出CSV
-
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] -
[1] 刘泰齐, 陈少永, 牟茂淋, 唐昌建.超电阻对气球模线性不稳定性影响的理论研究. 必威体育下载 , 2023, 72(14): 145201.doi:10.7498/aps.72.20230308 [2] 李亚莎, 刘世冲, 刘清东, 夏宇, 胡豁然, 李光竹.外电场下含有缔合缺陷的ZnO/ ${\boldsymbol{\beta }}$ -Bi2O3界面电学性能. 必威体育下载 , 2022, 71(2): 026801.doi:10.7498/aps.71.20210635[3] 李亚莎, 刘世冲, 刘清东, 夏宇, 胡豁然, 李光竹.外电场下含有缔合缺陷的ZnO/β-Bi2O3界面电学性能研究. 必威体育下载 , 2021, (): .doi:10.7498/aps.70.20210635 [4] 张登魁, 赵金良, 张红国, 岳明.LaFe11.5Si1.5化合物氢化特性及稳定性的研究. 必威体育下载 , 2014, 63(19): 197501.doi:10.7498/aps.63.197501 [5] 王辉, 蔺家骏, 何锦强, 廖永力, 李盛涛.沉淀剂对ZnO压敏陶瓷缺陷结构和电气性能的影响. 必威体育下载 , 2013, 62(22): 226103.doi:10.7498/aps.62.226103 [6] 李红霞, 陈雪平, 陈琪, 毛启楠, 席俊华, 季振国.下电极对ZnO薄膜电阻开关特性的影响. 必威体育下载 , 2013, 62(7): 077202.doi:10.7498/aps.62.077202 [7] 张希, 包伯成, 王金平, 马正华, 许建平.固定关断时间控制Buck变换器输出电容等效串联电阻的稳定性分析. 必威体育下载 , 2012, 61(16): 160503.doi:10.7498/aps.61.160503 [8] 郑树文, 范广涵, 李述体, 张涛, 苏晨.Be1-xMgxO合金的能带特性与相结构稳定性研究. 必威体育下载 , 2012, 61(23): 237101.doi:10.7498/aps.61.237101 [9] 曹功勋, 张晓青, 孙转兰, 王学文, 娄可行, 夏钟福.人工调控微结构压电驻极体的热稳定性和电荷动态特性. 必威体育下载 , 2010, 59(9): 6514-6520.doi:10.7498/aps.59.6514 [10] 汪志刚, 张杨, 文玉华, 朱梓忠.ZnO原子链的结构稳定性和电子性质的第一性原理研究. 必威体育下载 , 2010, 59(3): 2051-2056.doi:10.7498/aps.59.2051 [11] 梅龙伟, 张振华, 丁开和.单壁碳纳米管电子输运特性的稳定性分析. 必威体育下载 , 2009, 58(3): 1971-1979.doi:10.7498/aps.58.1971 [12] 羊新胜, 赵 勇.铁磁性锰氧化物掺杂的ZnO压敏电阻性能研究. 必威体育下载 , 2008, 57(5): 3188-3192.doi:10.7498/aps.57.3188 [13] 单晓楠, 黄 如, 李 炎, 蔡一茂.NiSi金属栅电学特性的热稳定性研究. 必威体育下载 , 2007, 56(8): 4943-4949.doi:10.7498/aps.56.4943 [14] 吕志伟, 王晓慧, 林殿阳, 王 超, 赵晓彦, 汤秀章, 张海峰, 单玉生.KrF激光受激布里渊散射反射率稳定性的研究. 必威体育下载 , 2003, 52(5): 1184-1189.doi:10.7498/aps.52.1184 [15] 刘 鹏, 杨同青, 王志宏, 徐 卓, 张良莹, 姚 熹.PLZST反铁电陶瓷电场诱导相变与相稳定性的研究. 必威体育下载 , 1998, 47(10): 1727-1733.doi:10.7498/aps.47.1727 [16] 石秉仁, 隋国芳, 郭干城.离子动力参数区托卡马克电阻性内扭曲模稳定性分析. 必威体育下载 , 1996, 45(5): 801-810.doi:10.7498/aps.45.801 [17] 吕曼祺, A. WAGENDRISTEL.非晶Nd-Fe薄膜电阻的温度效应与非晶稳定性. 必威体育下载 , 1993, 42(5): 840-846.doi:10.7498/aps.42.840 [18] 王炜, 姚希贤.圆对称环域Josephson隧道结的静态特性(Ⅱ)——自场方程解的稳定性. 必威体育下载 , 1988, 37(5): 714-719.doi:10.7498/aps.37.714 [19] 厉彦民, 赵光安.双极化子的能带,稳定性与热力学特性. 必威体育下载 , 1984, 33(2): 273-276.doi:10.7498/aps.33.273 [20] 马腾才, 宫野.电流非单调分布时的电阻流体不稳定性. 必威体育下载 , 1984, 33(8): 1112-1119.doi:10.7498/aps.33.1112
下载:
计量
- 文章访问数:3162
- PDF下载量:63
- 被引次数:0