本研究利用電弧熔煉法，備製兩階段壓縮機用儲氫合金，分別為用於第一階段之La0.6Ce0.4Ni5+x (x=0~3)系合金、與用於第二階段之Ti0.9Zr0.1Mn0.9-yCr0.9-yNi0.2+2y(y=0,0.1)系合金，結果顯示在100℃下，氫氣壓力可從35atm被提升到400atm。 用於第一階段氫壓縮機的La基儲氫合金為La0.6Ce0.4Ni6 合金，由於Ce的取代，導致合金晶格體積縮小，加上額外Ni的析出物束縛效應，有效提升合金的吸放氫平台壓，經由第一階段的壓縮，可將20℃下壓力約為35atm的外加氫氣缸瓶升壓到在100℃下的120atm，此一La0.6Ce0.4Ni6作為第一階段氫壓縮合金，具有中等儲氫量（1.05wt%）、高放氫平台壓（26atm）及低遲滯效應（0.34）的優點。 而第二階段氫壓縮機的Ti基儲氫合金為Ti0.9Zr0.1Mn0.8Cr0.8Ni0.4合金，以Ni部分取代較大原子的Mn及Cr，可使晶格體積略微縮小，導致吸放氫平台壓上升。可將第一階段所壓縮產生的氫氣，於20℃下，以77atm的壓力升壓到100℃下的400atm。此一Ti0.9Zr0.1Mn0.8Cr0.8Ni0.4合金，具有高放氫平台壓(42.81atm)、高壓縮率(5.3)及低遲滯效應（0.32）的優點。 因為兩系合金各自有其特色與優點，La基合金具有低壓穩定迅速吸氫，以及高溫放氫較完全的特點，選用此系合金作為第一階段氫壓縮材料；Ti基合金，放氫平台壓高且遲滯效應小，適合於相對高壓進行吸氫動作，能迅速吸收氫氣，進而縮減二階段充氫時間，增進此二階段氫壓縮機效率，於100℃下提供400atm的高壓氫氣。 In this research, the hydrogen storage alloys of tow-stage compresser are prepared by arc-melting. There are La0.6Ce0.4Ni5+x (x=0~3) serious alloys and Ti0.9Zr0.1Mn0.9-yCr0.9-yNi0.2+2y(y=0,0.1) serious alloys, which will be used in first-atage and second-stage hydrogen thermal compressers respectively. The results show up that the pressure of hydrogen gas can be compressed from 35atm to 400atm under 100℃. The La-based hydrogen storage alloy be used in the first-stage hydrogen thermal compresser is La0.6Ce0.4Ni6. By the substitution of Ce, the volume of the crystal unit cell is shrinkaged. In addition to the boundary effect of extra Ni priciptation will lift the adsorption and desorption plateau powerfully. Through first-stage compression, the commercial hydrogen gas can be compressed from 35atm(20℃) to 120atm(100℃). This La0.6Ce0.4Ni6 alloy, used in the first-stage hydrogen compresser, has medium hydrogen-storage quantity(1.05wt%)、high desorption plateau(26atm) and low hystersis effect(0.34). And the Ti-based hydrogen storage alloy used in the second-stage hydrogen thermal compresser is Ti0.9Zr0.1Mn0.8Cr0.8Ni0.4. By the Ni substitution of larger atoms such as Mn and Cr, the volume of the crystal unit cell will shrinkage lightly and lead the plateau pressure higher. The hydrogen gas produced from first-stage compresser can be compressed from 77atm(20℃) to 400atm(100℃). This Ti0.9Zr0.1Mn0.8Cr0.8Ni0.4 alloy has advantages such as high desorption plateau(42.81atm)、high compression ratio(5.3) and low hysteresis effect(0.32). The two systems of alloys have their own characteristics and advantages, the La based alloys can adsorb hydrogen stably and quickly under low pressure, and desorb hydeogen more completely at high temperature, so that choose this serious alloys to be the material of first-stage hydrogen compresser. The Ti based alloys have high desorption plateau and small hysteresis, and suitable to adsorb hydrogen gas quickly under relative high pressure. In addition to shorten the hydration time of the second stage and improve the efficiency to supply 400atm high pressure hydrogen gas under 100℃.
