1篇
您的检索式：作者名="Aima Ramli"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Role of Nd_2O_3 nanoparticles addition on microstructural and superconducting properties of YBa_2Cu_3O_(7–δ) ceramics显示文摘The effects of Nd_2O_3 nanoparticles addition on microstructure,transport and AC susceptibility properties of YBa_2Cu_3O_(7–δ)(Y123) superconductors were systematically investigated using X-ray diffraction(XRD),scanning electron micrograph(SEM),four point probe measurement and AC spectrometer.It was found that the added samples were predominant by Y-123 phase beside small amount of Y-211 and unreacted Nd_2O_3 secondary phases.All added samples preserved the orthorhombic structure similar to the pure sample and no orthorhombic-to-tetragonal transition occurred.The samples became more porous and their grain size significantly decreased with addition of Nd_2O_3.The addition of nano-Nd_2O_3 disturbed the grain growth of Y123,thus resulting in the degradation of superconducting properties of the samples.The superconducting transition temperature(Tc onset) of samples decreased from 92 K for x=0.0 to 78 K for x=1.0 wt.%,which could be attributable to oxygen vacancy disorder.From AC susceptibility result,the inter-and intra-granular loss peaks became wider and broader with increase of Nd_2O_3 addition due to the weakening of grains coupling.On the other hand,the inter-granular critical current density,Jcm,was found to increase with Nd_2O_3 addition and had the highest value at x=0.6,confirming that Nd_2O_3 nanoparticles acted as pinning centers in Y123 matrix. | Aima Ramli Abdul Halim Shaari Hussein Baqiah Chen Soo Kean Mohd Mustafa Awang Kechik Zainal Abidin Talib | 2016 | Journal of Rare Earths2016，34，9： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员