1) MgB 2 thick films
MgB2超导厚膜
2) superconducting MgB2 thin film
MgB2超导薄膜
1.
The superconducting MgB2 thin films were prepared on Al2O3 polycrystalline substrates by a two-step ex-situ magnesium-diffusion method with the precursor boron thin films grown by CVD from B2H6.
以高纯乙硼烷(B2H6)为B源,采用化学气相沉积(CVD)方法在多晶Al2O3衬底上沉积B薄膜,然后在Mg蒸气中异位退火来制备MgB2超导薄膜。
3) MgB_2 superconductor
MgB2超导体
4) MgB2 superconductor
MgB2超导体
1.
Using Mg powder and B powder as the main raw materials,MgB2 superconductors were fabricated under different sintering methods.
以Mg粉和B粉为主要原料,采用两种烧结方法制备出MgB2超导体。
2.
In order to optimize sintering techniques and preparation excellent property of MgB2 superconductor which synthesized by solid reaction, we firstly clarify the reaction process and mechanism by differential thermal analysis(DTA) ,XRD and SEM.
为了进一步澄清采用固相反应法制备超导 MgB2中相的形成过程及其反应机理,以求达到优化低温烧结工艺、制备高品质MgB2超导体的目的,本文以高精度差热分析仪(DTA)为主要研究手段来监测块体MgB2制备反应进程;结合XRD及SEM的物相分析和组织观察发现,在纯镁熔化之前,Mg粉与B粉便已发生化学反应生成MgB2超导相,整个反应过程分为固-固和液-固两种截然不同的反应机制,熔点之前主要为受界面控制的固溶形核阶段,之后为析出长女阶段。
5) MgB_2 wires
MgB2超导线材
1.
Phase compositions, microstructure features, chemical components and critical current density (J_c) of the doped and the undoped MgB_2 wires are investigated by using X-ray diffractometer, scanning electron microscopy, energy dispersive spectrometer and the standard four-probe resistance technique, respectively.
以低碳钢管为包套材料,采用原位粉末套管法制备出5mol%TiB2掺杂的MgB2超导线材。
6) MgB2 superconducting bulk
MgB2超导块材
1.
The single phase MgB2 superconducting bulk was successfully synthesized by SHS ( Self-Propagating High-Temperature Synthesis) , method.
采用自蔓延(SHS)法成功制备了MgB2超导块材,样品单相性好,其临界温度Tc=38。
补充资料：正常（超导）—超导（正常）转变
正常（超导）—超导（正常）转变
transitionfromnormal(superconducting)statetosuperconducting(normal)state
一般指在常压下改变温度到Tc时，物质的电阻从R＞0（R=0）的正常态（超导态）到R=0（R＞0）的超导态（正常态）的转变。无磁场时这种转变属二级相变。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条