论文部分内容阅读
人们就象不了解稀土元素一样不了解朴松燮. 稀土元素——周期系数第111类副族元素及原子序数从57到71的十五个镧系元素的合称.当它们带着多种多样物理上和化学上的超异特性翩然进入冶金、玻璃、陶瓷、医学、农业等领域,便会呈现这样一派广阔灿烂的前景:火箭、导弹、宇航飞行器的外皮格外轻便、耐磨、耐高温;形形色色的玻璃陶瓷制品格外光洁、华美、耐用;医疗器械格外坚固、轻巧而不使患者痛苦;化学肥料的肥效高于寻常农肥的千倍、万倍……看!军事、科研、人民
People do not understand Park Sung-sop as they do not know about rare earth elements - the combination of rare earth elements - the 111th subgroup of the periodicity and the fifteen lanthanides with an atomic number of 57 to 71. When they carry a variety of physics On the chemical and super-unique features into the metallurgy, glass, ceramics, medicine, agriculture and other fields, there will be such a broad and brilliant prospects for the future: rocket, missiles, spacecraft outer skin extraordinarily lightweight, wear-resistant, high temperature; all kinds of colors Of the glass ceramic products are exceptionally bright and clean, beautiful and durable; medical devices are exceptionally strong and lightweight without suffering to the patients; chemical fertilizers are more efficient than common agricultural fertilizers, thousands of times ... Look! Military, scientific research and people