中文摘要：

采用水热法，以3mol／L NaOH作为矿化剂，在260℃下，保温28h进行Cr合金化（z=0．10，0．15，0．20，0．25）．合成Zn1-xCrxO稀磁半导体晶体．研究了Cr合金化对水热合成Zn1-xCrxO稀磁半导体粉体结构和性能的影响．XRD测试表明，Cr元素进入到ZnO的品格内，实现了Cr的合金化，晶粒尺寸分别为46．5、46．1、50．6和48．9nm从FE—SEM可以观察到，x≥0．2时，晶体的形貌从短柱状转变为长柱状．通过UV／Vis测试可以观察到Cr离子的吸收峰，ZnO的禁带宽度依次降低为3．17、3．18，3．19和3．23eV．VSM测试表明，所制备的Zn1-XCrXO纳米晶体在室温下均表现出弱顺磁性．

英文摘要：

Zn1-xCrxO diluted magnetic semiconductors were synthesized by hydrothermal method at 260℃ for about 28h with different concentrations of Cr （x=0.1, 0.15, 0.2 and 0.25）, NaOH with concentration of 3mol/L were used as the mineralizer. X-ray diffraction patterns indicate that as-prepared Cr-alloyed ZnO has the wurtzite structure with Zn^2＋ partially substituted by Cr^3＋, and the average crystallite size of Zn1-xCrxO are 46.5, 46.1, 50.6 and 48.9nm, respectively. FE-SEM analyses show that the structure of nanopowders changes from short stylolitic structure to long stylolitic structrue when Cr concentration x increases to 0.2. The absorption peaks of Cr-doped nanopowders are demonstrated by UV-Vis analysis, and Eg of ZnO are 3.17, 3.18, 3.19 and 3.23eV, respectively. Room temperature VSM reveals a weakly paramagnetism behavior of the as-prepared Zn1-xCrxO nanocrystalline.