在有关Y(La)Ba_2Cu_3O_(7-x)体系高Tc超导电性机理的研究中,有人提到过氧键(peroxide bonding)和过氧离子O_2~(2-)的问题,并认为它的存在对高温超导电性有很大的影响。但迄今为止,O_2~(2-)的存在并未有得到实验的证实。我们在对YBa_2Cu_3O_(7-x)样品(X-光相纯)进行红外光谱测定(KBr压片)时发现,正交相的样品在1046cm~(-1)处出现特征吸收,它与过氧离子的O-O键的特征吸收是一致的,而四方相的样品没有此现象。 In the research on the mechanism of high Tc superconductivity of Y (La) Ba_2Cu_3O_ (7-x) system, some people have mentioned the problem of peroxide bonding and peroxide ions O_2 ~ (2-) Existence of high temperature superconductivity has a great impact. But so far, the existence of O_2 ~ (2-) has not been experimentally confirmed. In the infrared spectroscopy of YBa_2Cu_3O_ (7-x) samples (X-ray phase purity) (KBr pellets), we found that the sample with quadrature phase exhibits characteristic absorption at 1046cm -1, The characteristic absorption of the OO bonds of the ions is consistent, but the samples of the tetragonal phase do not have this phenomenon.