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本文研究了ｘ值在０．００４０～０．００６５范围内、掺杂ＣｕＯ的（Ｖ（１－ｘ）Ｃｒｘ）Ｏ３基ＰＴＣＲ陶瓷的组成、显微结构对性能的影响．结果表明：随ｘ值增大，（Ｖ（１－ｘ）Ｃｒｘ）Ｏ３的ｃ／α结晶轴比增大，居里点下降、ＰＴＣ倍率α（ρ（ｍａｘ）／ρ（ｍｉｎ））增大、α与ｃ／ａ之间存在α＝６６０ｃ／α－１８６６的线性关系，其阻温特性存在明显的热滞现象．部分ＣｕＯ还原为Ｃｕ弥散在材料基体中；可降低室温电阻率．初步探索了导致这些现象产生的微观机制．
In this paper, the composition and microstructure of (V (1-x) Crx) O3-based PTCR ceramics with CuO doped in the range of 0.0040 ~ 0.0065 were studied. The results show that as the x value increases, the c / α crystallographic axis ratio of (V (1-x) Crx) O3 increases, the Curie point decreases and the PTC magnification ratio α (ρ max / ρ min) increases , There is a linear relationship between α and c / a of α = 660c / α-1866, and the temperature resistance has obvious thermal hysteresis. Some CuO reduced to Cu dispersed in the matrix material; can reduce the room temperature resistivity. Preliminary exploration of the microscopic mechanisms leading to these phenomena.