Space Efficient Opposed-Anvil High-Pressure Cell and Its Application to Optical and NMR Measurements up to 9 GPa
Space Efficient Opposed-Anvil High-Pressure Cell and Its Application to Optical and NMR Measurements up to 9 GPa
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DOI：
10.1143/jpsj.79.024001
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发表时间：
2010-02-01
影响因子：
1.7
通讯作者：
Takigawa, Masashi
中科院分区：
文献类型：
--
作者：
Kitagawa, Kentaro;Gotou, Hirotada;Takigawa, Masashi
我们研制了一种新型的对砧式高压电池，大大提高了空间效率。钳位电池和垫片采用非磁性镍铬铝合金制成。非磁性碳化钨（NMWC）用于砧座。尺寸为φ 29 mm x 41 mm的组装电池能够在相对较大的样品空间（7 mm）内产生高达9 GPa的压力（3）。我们的细胞是特别适合于那些需要大的样本空间，以实现良好的信噪比的实验，如核磁共振（NMR）实验。采用氩气作为传压介质，以获得良好的流体静力性。通过测量红宝石透过透明碳硅石（6 H-SiC）窗口发出的荧光，对压力进行了原位标定。测量了Cu_2 O的Cu-63核四极共振（NQR）频率和金属锡的面内Knight位移随压力和温度的变化。和白金版的骑士变身这些量可以作为可靠的压力计，在高达9 GPa的NMR/NQR实验中确定原位压力值。
We have developed a new type of opposed-anvil high pressure cell With substantially improved space efficiency. The clamp cell and the gasket are made of non-magnetic Ni-Cr-Al alloy. Non-magnetic tungsten carbide (NMWC) is used for the anvils. The assembled cell with the dimension phi 29 mm x 41 mm is capable of generating pressure up to 9 GPa over a relatively large sample space to 7 mm(3). Our cell is particularly suitable for those experiments which require large sample space to achieve good signal-to-noise ratio, such as the nuclear magnetic resonance (NMR) experiment. Argon is used as the pressure transmitting medium to obtain good hydrostaticity. The pressure was calibrated ill situ by Measuring the fluorescence from ruby through a transparent moissanite (6H-SiC) window, We have Measured the pressure and temperature dependences of the Cu-63 nuclear-quadrupole-resonance (NQR) frequency of Cu2O, the in-plane Knight shift of metallic tin. and the Knight Shift of platinum. These quantities call be used as reliable manometers to determine the pressure Values ill situ during the NMR/NQR experiments up to 9 GPa.