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BaTiO_3是一种典型的钙钛矿型结构的晶体.一般工艺上可用两种方法使其成为N型半导体.一种方法是在纯度为99.99%BaTiO_3中添加0.1%～0.3%mol的微量稀土元素,
BaTiO_3 is a typical crystal of perovskite type structure. Two methods are generally used to make N-type semiconductors. One method is to add trace amounts of rare earth elements (REEs) of 0.1% -0.3% mol to BaTiO 3 with the purity of 99.99% ,