摘要
中国绵阳研究堆(CMRR)的高压中子衍射谱仪(凤凰,HPND)由中子聚焦系统、探测器系统、高压加载与集成系统等部分组成,可进行常压高低温、高压环境下的中子衍射实验,其中子衍射实验的原位室温高压加载最高可达30 GPa,高温高压加载最高可达2000 K、10 GPa。目前,凤凰谱仪已被广泛应用于材料研究领域,如过渡金属氮化物、锂离子材料、磁性材料、含能材料、铁电陶瓷等。利用常规中子衍射、高低温中子衍射以及高压中子衍射技术,获得材料的原子精确占位、磁结构、晶体结构以及相变等信息。
High pressure neutron diffractometer(HPND),also known as FENGHUANG,at China Mianyang Research Reactor’s(CMRR)neutron science platform,which include neutron focusing system,detector system,high-pressure devices and integrated system,can be constructed to in situ neutron diffraction experiments under ambient,high/low temperature,and high-pressure conditions.For in situ high-pressure neutron diffraction experiments,the pressure can reach to over 30 GPa at room temperature,and 10 GPa at 2000 K.FENGHUANG diffractometer has been widely applied in the field of materials researches,to provide precise information on atomic occupation,magnetic structure,crystalline structure and phase transitions,such as transition-metal nitrides,Li-containing materials,magnetic materials,energetic materials,ferroelectric ceramics.
作者
孙嘉程
陈喜平
谢雷
房雷鸣
SUN Jiacheng;CHEN Xiping;XIE Lei;FANG Leiming(Institute of Nuclear Physics and Chemistry,China Academy of Engineering Physics,Mianyang 621999,Sichuan,China)
出处
《高压物理学报》
CAS
CSCD
北大核心
2024年第3期111-120,共10页
Chinese Journal of High Pressure Physics
基金
国家自然科学基金(12075215,11427810)。
关键词
高压
中子衍射
原子占位
结构相变
high pressure
neutron diffraction
atomic occupancy
structural phase transition
