【作者】 郑文礼；

【导师】 韦志仁；

【作者基本信息】 河北大学 ， 光学， 2004， 硕士

【摘要】 本文采用水热法合成了ZnO晶体，并通过掺杂Mn化合物合成了Mn_xZn_1-xO稀磁半导体，研究了其低温下的磁化性能和铁磁性能，发现水热合成的晶体出现明显的铁磁性，居里温度达到50K。论文的完成将对探索Mn_xZn_1-xO稀磁半导体单晶的生产工艺有一定的指导意义。本文还研究了水热法合成多形态薄片状纳米薄水铝石。在430℃，矿化剂为1mol*L^-1KOH、1mol*L^-1KBr，填充度35％时，前驱物为Al（OH）₃，所合成的晶体为纯刚玉晶体。当添加一定量的Ti化合物或混合的Ti、Fe离子时，刚玉晶体的合成过程受到一定的影响，当Ti离子含量较低时可以合成出蓝宝石晶体或Ti宝石晶体；含量较高时AlO₆生长基元的脱羟基过程受到影响，只能合成出薄水铝石或纳米薄片状阵列，且晶体薄片呈现规则的排列，显示了强烈的纳米自组织倾向。此项工作对研究水热条件下晶体的自组织生长过程有一定的意义。更多还原

【Abstract】 ZnO crystals were synthesized by hydrothermal method in this work. We obtained MnxZn1-xO DMS by doping the Mn composition and studied its magnetic and ferromagnetic properties. The crystals showed obvious ferromagnetism and the Tc reached 50K. This thesis will provide guidance for exploring the synthesis conditions of MnxZn1-xO DMS. The sheet nano boehmites with different morphology were successfully synthesized by hydrothermal method. The pure a-Al2O3 were first obtained when the lmolL-1KOH andlmolL-1 KBr were used as mineralize at 430癈 with the fill factor of-35% and the Al (OH)3 precursor. When the dopants were Ti ions or the mixture of Ti and Fe ions, the synthesis process of a-Al2O3 was affected. Sapphire crystals or Ti doped sapphire crystals can be obtained when only the content of Ti was lower. When the content of Ti ion was higher, only the boehmite or the nano sheet matix instead of a-Al2O3 crystal was presented in the product. The sheet crystal exhibits regular arrangement, indicating the intense tendency of self- assembly. This study is instructive for exploring the self- assembly process of hydrothermal synthesis.更多还原