Results 31 to 40 of about 53,681 (204)
四川大学学报. 自然科学版, 2005 用固相烧结法制备了不同Nd掺杂量的SrBi4-xNdxTi4O15(SBNT-x,x=0.00～1.00)铁电陶瓷.X射线衍射谱显示Nd掺杂未改变SrBi4Ti4O15(SBTi)的晶体结构.铁电测量表明,适量的Nd掺杂使SBTi的剩余极化(2Pr)显著增加.当x=0.18时,2Pr达到极大值,为25.8μC/cm2,和未掺杂相比,增长约56%.样品的矫顽场在x=0.00到0.18之间几乎不变,而在更大掺杂量下,随掺杂量的增加而逐步减小.掺杂引起材料中点缺陷浓度降低和晶格畸变减小 ...
王伟, 朱骏, 毛翔宇, 陈小兵
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT To meet the escalating demand for high‐performance LiCoO2 (LCO) cathodes, elevating the charging cut‐off voltage becomes highly imperative to achieve markedly enhanced specific capacities. However, high‐voltage operation is always accompanied by structural instability, notably deleterious bulk phase transitions and severe interfacial ...
Jiawei Mu +7 more
wiley +1 more source
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT The low energy density of sodium‐ion batteries (SIBs) remains a major barrier to their large‐scale deployment. Alloy‐based anodes represent a promising class of materials owing to their high specific capacity and low operating potential for sodium storage. However, their practical application is hindered by severe volume expansion upon cycling.
Chen Wang +10 more
wiley +1 more source
Gongye shui chuli, 2013 以钛酸四丁酯、硝酸铋和尿素为原料,采用溶胶-凝胶法制备了不同掺杂量的铋和氮的单掺杂及共掺杂TiO2光催化剂。以活性黑KN-B为模拟染料废水考察了所制备TiO2的光催化性能,研究了染料光催化降解的影响因素。结果表明,铋和氮共掺杂TiO2比TiO2及单掺杂TiO2的光催化活性要高。当Bi0.5N8.0/TiO2的投加量为4.0 g/L,活性黑KN-B初始质量浓度为40 mg/L,pH为2.23,在125 W汞灯下光照20 min时,活性黑KN-B的降解率接近99.9 ...
姜聚慧, 梁宁, 宋世理, 郭颖
doaj +2 more sources
四川大学学报. 自然科学版, 2008 通过射频磁控溅射技术在Si(111)衬底上制备了不同含量的Nd掺杂ZnO薄膜.XRD和AFM分析表明,Nd掺杂没有改变ZnO薄膜的结构,薄膜为纳米多晶结构,未掺杂ZnO沿c择优生长.Nd掺杂使ZnO薄膜表面粗糙,起伏较大,薄膜中随Nd掺杂量的增加颗粒减小.室温光致发光谱显示,薄膜出现了395nm的强紫光峰和495nm的弱绿光峰,同时,Nd掺杂不改变PL谱的峰位置,Nd含量对PL谱的峰强度产生了一定影响.
文军, 陈长乐
doaj
Rare Metals, Volume 45, Issue 8, August 2026.ABSTRACT Na‐superionic‐conductor‐type (NASICON) Na4MnV(PO4)3 (NMVP) is an appealing cathode for sodium‐ion batteries (SIBs), but its application is hindered by Jahn–Teller distortions, sluggish Na+ kinetics and poor conductivity, leading to rapid capacity fade.
Huan Liu +8 more
wiley +1 more source
Enhanced Magnetocaloric Effect in Tb‐Co‐Ni Magnets via Chemical Pressure
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Magnetic refrigeration materials are significantly needed in versatile modern industries, including scientific research, aerospace, and health care, due to their potential applications in gas liquefaction and storage. Herein, a significantly enhanced magnetocaloric effect with a suitable operation temperature range of 53–114 K and a giant ...
Lei Xi +11 more
wiley +1 more source
(Cu,N)共掺杂TiO 2 /MoS 2 异质结的电子和光学性能:杂化泛函HSE06
, 2018 在密度泛函理论的基础上，系统地研究了Cu/N（共）掺杂的TiO2/MoS2异质结体系的几何结构、电子结构和光学性质.计算发现，TiO2/MoS2异质结的带隙相比于纯的TiO2（101）表面明显变小，Cu/N（共）掺杂TiO2/MoS2异质结体系的禁带宽度也明显地减小，这导致光子激发能量的降低和光吸收能力的提高.通过计算Cu/N（共）掺杂TiO2/MoS2的差分电荷密度，发现光生电子与空穴积累在掺杂后的TiO2（101）表面和单层MoS2之间，这表明掺杂杂质体系可以有效地抑制光生电子-空穴对的复合.此外 ...
Guan-Shi Wang +4 more
semanticscholar +1 more source
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT Heteroatom coordination regulation is an effective strategy to enhance Fenton‐like catalysis of single atom catalysts, yet its impact on the local microenvironment of active sites still requires in‐depth investigation. Herein, Cl2–Fe–NC catalysts with axial Cl coordination are prepared.
Jing‐Hao Yan +6 more
wiley +1 more source
Rare Metals, Volume 45, Issue 7, July 2026.ABSTRACT High‐strength aluminum (Al) alloys are usually unprintable by laser powder bed fusion (LPBF) due to the severe hot cracking along the columnar grains. Doping elements scandium (Sc) and/or zirconium (Zr) is an effective way to eliminate hot cracks by refining the grain size to nearly nanoscale levels.
Zehuan Zhang +15 more
wiley +1 more source