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    Boron nitride and boron nitride nanotube materials for radiation shielding
    1.
    发明申请
    Boron nitride and boron nitride nanotube materials for radiation shielding 审中-公开
    氮化硼和氮化硼纳米管材料用于辐射屏蔽

    公开(公告)号：US20130119316A1

    公开(公告)日：2013-05-16

    申请号：US13068329

    申请日：2011-05-09

    申请人： Godfrey Sauti ,  Cheol Park ,  Jin Ho Kang ,  Jae-Woo Kim ,  Joycelyn S. Harrison ,  Michael W. Smith ,  Kevin Jordan ,  Sharon E. Lowther ,  Peter T. Lillehei ,  Sheila A. Thibeault

    发明人： Godfrey Sauti ,  Cheol Park ,  Jin Ho Kang ,  Jae-Woo Kim ,  Joycelyn S. Harrison ,  Michael W. Smith ,  Kevin Jordan ,  Sharon E. Lowther ,  Peter T. Lillehei ,  Sheila A. Thibeault

    IPC分类号： G21F1/10

    CPC分类号： G21F1/103 ,  G21F1/00

    摘要： Effective radiation shielding is required to protect crew and equipment in various fields including aerospace, defense, medicine and power generation. Light elements and in particular hydrogen are most effective at shielding against high-energy particles including galactic cosmic rays, solar energetic particles and fast neutrons. However, pure hydrogen is highly flammable, has a low neutron absorption cross-section, and cannot be made into structural components. Nanocomposites containing the light elements Boron, Nitrogen, Carbon and Hydrogen as well dispersed boron nano-particles, boron nitride nanotubes (BNNTs) and boron nitride nano-platelets, in a matrix, provide effective radiation shielding materials in various functional forms. Boron and nitrogen have large neutron absorption cross-sections and wide absorption spectra. The incorporation of boron and nitrogen containing nanomaterials into hydrogen containing matrices provides composites that can effectively shield against neutrons and a wide range of radiation species of all energies without fragmentation and the generation of harmful secondary particles.

    摘要翻译： 需要有效的辐射屏蔽来保护航空航天，国防，医药和发电等各个领域的船员和设备。 轻元素，特别是氢是最有效的屏蔽高能粒子，包括星系宇宙射线，太阳能能粒子和快中子。 然而，纯氢是高度易燃的，具有低的中子吸收横截面，并且不能制成结构部件。 含有轻质元素的纳米复合材料可以提供各种功能形式的有效的辐射屏蔽材料，硼，氮，碳和氢以及分散的硼纳米颗粒，氮化硼纳米管（BNNTs）和氮化硼纳米血小板。 硼和氮具有大的中子吸收截面和宽的吸收光谱。 将含硼和氮的纳米材料掺入含氢基质提供了复合材料，可以有效地屏蔽所有能量的中子和宽范围的辐射种类，而不会产生碎片和产生有害的二次粒子。

    Laser ablative synthesis of carbon nanotubes
    4.
    发明授权
    Laser ablative synthesis of carbon nanotubes 失效
    激光烧蚀合成碳纳米管

    公开(公告)号：US07671306B1

    公开(公告)日：2010-03-02

    申请号：US11589011

    申请日：2006-10-27

    申请人： Michael W. Smith ,  Kevin Jordan ,  Cheol Park

    发明人： Michael W. Smith ,  Kevin Jordan ,  Cheol Park

    IPC分类号： H05B6/02 ,  B23K26/02 ,  B23K26/08 ,  D01F9/12

    CPC分类号： B82Y40/00 ,  B82Y30/00 ,  C01B32/162 ,  C01B2202/02 ,  Y10S977/844

    摘要： An improved method for the production of single walled carbon nanotubes that utilizes an RF-induction heated side-pumped synthesis chamber for the production of such. Such a method, while capable of producing large volumes of carbon nanotubes, concurrently permits the use of a simplified apparatus that allows for greatly reduced heat up and cool down times and flexible flowpaths that can be readily modified for production efficiency optimization. The method of the present invention utilizes a free electron laser operating at high average and peak fluence to illuminate a rotating and translating graphite/catalyst target to obtain high yields of SWNTs without the use of a vacuum chamber.

    摘要翻译： 一种用于生产单壁碳纳米管的改进方法，其利用RF感应加热的侧面泵浦合成室来生产。 这种方法虽然能够生产大量的碳纳米管，但同时允许使用简化的装置，其允许大大减少加热和冷却时间，并且柔性流路可以容易地改变以用于生产效率优化。 本发明的方法利用以高平均峰值能量密度工作的自由电子激光器照射旋转和平移石墨/催化剂靶，以获得高产率的SWNT而不使用真空室。

    Boron Nitride Nanotubes
    5.
    发明申请
    Boron Nitride Nanotubes 有权
    氮化硼纳米管

    公开(公告)号：US20090117021A1

    公开(公告)日：2009-05-07

    申请号：US12152414

    申请日：2008-05-14

    申请人： Michael W. Smith ,  Kevin Jordan ,  Cheol Park

    发明人： Michael W. Smith ,  Kevin Jordan ,  Cheol Park

    IPC分类号： C01B21/064 ,  B01J19/12

    CPC分类号： C01B21/0641 ,  B82Y30/00 ,  C01B35/146 ,  C01P2004/04 ,  C01P2004/13 ,  C01P2004/133 ,  C01P2004/16 ,  C30B23/00 ,  C30B29/403 ,  C30B29/602

    摘要： Boron nitride nanotubes are prepared by a process which includes: (a) creating a source of boron vapor; (b) mixing the boron vapor with nitrogen gas so that a mixture of boron vapor and nitrogen gas is present at a nucleation site, which is a surface, the nitrogen gas being provided at a pressure elevated above atmospheric, e.g., from greater than about 2 atmospheres up to about 250 atmospheres; and (c) harvesting boron nitride nanotubes, which are formed at the nucleation site.

    摘要翻译： 氮化硼纳米管是通过以下工艺制备的，该方法包括：（a）产生硼蒸汽源; （b）将硼蒸气与氮气混合，使得硼蒸气和氮气的混合物存在于作为表面的成核位置，氮气以高于大气压的压力提供，例如从大于约 2个大气压至250个大气压; 和（c）收获在成核部位形成的氮化硼纳米管。

    Boron nitride nanotubes
    6.
    发明授权
    Boron nitride nanotubes 有权
    氮化硼纳米管

    公开(公告)号：US08206674B2

    公开(公告)日：2012-06-26

    申请号：US12152414

    申请日：2008-05-14

    申请人： Michael W. Smith ,  Kevin Jordan ,  Cheol Park

    发明人： Michael W. Smith ,  Kevin Jordan ,  Cheol Park

    IPC分类号： C01B21/064 ,  B01J19/12

    CPC分类号： C01B21/0641 ,  B82Y30/00 ,  C01B35/146 ,  C01P2004/04 ,  C01P2004/13 ,  C01P2004/133 ,  C01P2004/16 ,  C30B23/00 ,  C30B29/403 ,  C30B29/602

    摘要： Boron nitride nanotubes are prepared by a process which includes: (a) creating a source of boron vapor; (b) mixing the boron vapor with nitrogen gas so that a mixture of boron vapor and nitrogen gas is present at a nucleation site, which is a surface, the nitrogen gas being provided at a pressure elevated above atmospheric, e.g., from greater than about 2 atmospheres up to about 250 atmospheres; and (c) harvesting boron nitride nanotubes, which are formed at the nucleation site.

    摘要翻译： 氮化硼纳米管是通过以下工艺制备的，该方法包括：（a）产生硼蒸汽源; （b）将硼蒸气与氮气混合，使得硼蒸气和氮气的混合物存在于作为表面的成核位置，氮气以高于大气压的压力提供，例如从大于约 2个大气压至250个大气压; 和（c）收获在成核部位形成的氮化硼纳米管。

    Apparatus for the production of boron nitride nanotubes
    7.
    发明授权
    Apparatus for the production of boron nitride nanotubes 有权
    用于生产氮化硼纳米管的装置

    公开(公告)号：US08753578B1

    公开(公告)日：2014-06-17

    申请号：US12322591

    申请日：2009-02-04

    申请人： Michael W. Smith ,  Kevin Jordan

    发明人： Michael W. Smith ,  Kevin Jordan

    IPC分类号： B01J19/08

    CPC分类号： B01J19/121 ,  B01J2219/0871 ,  B01J2219/0883 ,  B82Y30/00 ,  C04B35/6229 ,  C04B2235/5284

    摘要： An apparatus for the large scale production of boron nitride nanotubes comprising; a pressure chamber containing; a continuously fed boron containing target; a source of thermal energy preferably a focused laser beam; a cooled condenser; a source of pressurized nitrogen gas; and a mechanism for extracting boron nitride nanotubes that are condensed on or in the area of the cooled condenser from the pressure chamber.

    摘要翻译： 一种用于大规模生产氮化硼纳米管的装置，包括： 一个压力室包含; 连续供给的含硼靶材; 热能源优选聚焦激光束; 冷却冷凝器 加压氮气源; 以及用于提取在压力室中冷凝在冷凝器的区域中或其中冷凝的氮化硼纳米管的机构。

    Apparatus for the laser ablative synthesis of carbon nanotubes
    8.
    发明授权
    Apparatus for the laser ablative synthesis of carbon nanotubes 失效
    用于激光烧蚀合成碳纳米管的装置

    公开(公告)号：US07663077B1

    公开(公告)日：2010-02-16

    申请号：US11589010

    申请日：2006-10-27

    申请人： Michael W. Smith ,  Kevin Jordan

    发明人： Michael W. Smith ,  Kevin Jordan

    IPC分类号： H05B6/02 ,  B23K26/02 ,  B23K26/08 ,  D01F9/12

    CPC分类号： H05B6/108 ,  D01F9/12 ,  Y10S977/844

    摘要： An RF-induction heated side-pumped synthesis chamber for the production of carbon nanotubes. Such an apparatus, while capable of producing large volumes of carbon nanotubes, concurrently provides a simplified apparatus that allows for greatly reduced heat up and cool down times and flexible flowpaths that can be readily modified for production efficiency optimization.

    摘要翻译： 一种用于生产碳纳米管的RF感应加热侧泵浦合成室。 这种设备虽然能够生产大量的碳纳米管，但同时提供了简化的装置，其允许大大减少加热和冷却时间，并且柔性流路可以容易地改变以用于生产效率优化。