采用水热法制备PbTe微晶,研究水热法合成PbTe微晶工艺过程中碲源、反应时间、反应温度、碱加入量、还原剂及表面活性剂等对PbTe微晶形貌的影响,分别采用X射线衍射(X-ray diffraction,XRD)和扫描电镜(scanning electron microscope,SEM)...采用水热法制备PbTe微晶,研究水热法合成PbTe微晶工艺过程中碲源、反应时间、反应温度、碱加入量、还原剂及表面活性剂等对PbTe微晶形貌的影响,分别采用X射线衍射(X-ray diffraction,XRD)和扫描电镜(scanning electron microscope,SEM)对制备的PbTe进行表征.结果表明,控制不同的合成工艺可制备得到立方体、花状和树突状等多种形貌的PbTe微晶.展开更多
The molecular formular of celsian is Bao·Al 2O 3·2SiO 2 Its smelting point is 1 770℃ and thermal expansion coeffcient is lower. According to the literature reports, the monoclinic celsian therrnal expansion...The molecular formular of celsian is Bao·Al 2O 3·2SiO 2 Its smelting point is 1 770℃ and thermal expansion coeffcient is lower. According to the literature reports, the monoclinic celsian therrnal expansion coefficient of ceramic are 2.7×10 -6 /℃(20~1 000℃),therefore, the celsian has the good urgent cold resistant and heat resisting. Taking the monoclinic celsian as the basic material of ceramic, its applied prospects are very extensive. Celsian deposits are quite fewer dispersed in the nature. We make use of kaolin and baryte of Guizhou as raw material and carry out the experimental research on artificial synthetic celsian, and explored the influence factors of all kinds for synthetic celsian.展开更多
文摘采用水热法制备PbTe微晶,研究水热法合成PbTe微晶工艺过程中碲源、反应时间、反应温度、碱加入量、还原剂及表面活性剂等对PbTe微晶形貌的影响,分别采用X射线衍射(X-ray diffraction,XRD)和扫描电镜(scanning electron microscope,SEM)对制备的PbTe进行表征.结果表明,控制不同的合成工艺可制备得到立方体、花状和树突状等多种形貌的PbTe微晶.
文摘The molecular formular of celsian is Bao·Al 2O 3·2SiO 2 Its smelting point is 1 770℃ and thermal expansion coeffcient is lower. According to the literature reports, the monoclinic celsian therrnal expansion coefficient of ceramic are 2.7×10 -6 /℃(20~1 000℃),therefore, the celsian has the good urgent cold resistant and heat resisting. Taking the monoclinic celsian as the basic material of ceramic, its applied prospects are very extensive. Celsian deposits are quite fewer dispersed in the nature. We make use of kaolin and baryte of Guizhou as raw material and carry out the experimental research on artificial synthetic celsian, and explored the influence factors of all kinds for synthetic celsian.