在实验室研究的基础上 ,在 L F/ VD精炼设备上进行了钡系合金对钢液的脱氧工业试验。试验发现采用Si Al Ba Ca脱氧时的全氧含量基本上在各个工位均低于采用 Al和 Fe Si Al脱氧 ,其脱氧产物上浮速度要快于用 Al脱氧 ,能够较快地使夹杂物...在实验室研究的基础上 ,在 L F/ VD精炼设备上进行了钡系合金对钢液的脱氧工业试验。试验发现采用Si Al Ba Ca脱氧时的全氧含量基本上在各个工位均低于采用 Al和 Fe Si Al脱氧 ,其脱氧产物上浮速度要快于用 Al脱氧 ,能够较快地使夹杂物数量达到较低的水平 ,且试验中夹杂物的球化作用比较明显 。展开更多
The title nanocrystalline powders were prepared by sol-gel method, the influences of grain size on crystal structure were investigated by XRD and DSC techniques. The experiment results show that the tetragonal ferroel...The title nanocrystalline powders were prepared by sol-gel method, the influences of grain size on crystal structure were investigated by XRD and DSC techniques. The experiment results show that the tetragonal ferroelectric phase content of the powders and the Curie temperature Tc are increased with the increase of grain size. When the grain size is less than 34. 7nm, crystal structure of the particle changes into cubic paraelectric phase and the transition of ferro-paraelectric phase disappears as well.展开更多
文摘在实验室研究的基础上 ,在 L F/ VD精炼设备上进行了钡系合金对钢液的脱氧工业试验。试验发现采用Si Al Ba Ca脱氧时的全氧含量基本上在各个工位均低于采用 Al和 Fe Si Al脱氧 ,其脱氧产物上浮速度要快于用 Al脱氧 ,能够较快地使夹杂物数量达到较低的水平 ,且试验中夹杂物的球化作用比较明显 。
文摘The title nanocrystalline powders were prepared by sol-gel method, the influences of grain size on crystal structure were investigated by XRD and DSC techniques. The experiment results show that the tetragonal ferroelectric phase content of the powders and the Curie temperature Tc are increased with the increase of grain size. When the grain size is less than 34. 7nm, crystal structure of the particle changes into cubic paraelectric phase and the transition of ferro-paraelectric phase disappears as well.
