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本文介绍了碱卤晶体电击穿场强与温度关系的研究。提及弗列里赫低温及高温晶体电击穿理论的概念。对许多国外作者的试验结果进行了综述。本文对NaCl及KBr晶体的电击穿场强与温度关系进行了试验研究,采用一面有球穴的试样,试样两面均以真空喷镀铝金属膜作电极,然后放入充有约30大气压氮气的金属压力罐中,进行击穿试验。直流下Nacl约在50℃时出现最大击穿场强,其数值约1.5×10~6 伏/厘米,而KBr则在120℃左右出现最大值,其数值约0.95×10~6伏/厘米。实验结果应用弗列里赫低温及高温晶体电击穿理论来解释。而对实验中晶体电强度在直流及交变电压下出现不一致的现象,则提出了晶体中存在两种空间电荷影响击穿的看法。
This article describes the alkaline halide crystal breakdown field strength and temperature relationship. The concept of Frehrich’s theory of electrical breakdown at low and high temperatures is mentioned. The author summarizes the results of many foreign authors. In this paper, the relationship between electric field breakdown temperature and temperature of NaCl and KBr crystals was investigated. Using a sample with a hole on one side, vacuum metallized aluminum films were used as electrodes on both sides of the sample. Atmospheric pressure nitrogen metal pressure tank, the breakdown test. The maximum breakdown strength of Nacl at about 50 ℃ is about 1.5 × 10 ~ 6V / cm under direct current, while the maximum value of KBr at about 120 ℃ is about 0.95 × 10 ~ 6V / cm. The experimental results are explained using Freire’s theory of low-temperature and high-temperature crystal breakdown. However, in the experiment, the phenomenon of inconsistency of the crystal electric strength at DC and AC voltage was proposed, and two kinds of space charge in the crystal were proposed to influence the breakdown.