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公开(公告)号：US20200277188A1
公开(公告)日：2020-09-03
申请号：US16878764
申请日：2020-05-20
申请人： BNNT, LLC
IPC分类号： C01B21/064 , C01B35/14 , H01L21/00 , B82Y30/00 , D01F9/08 , H01L23/373
摘要： Described herein are apparatus, systems, and methods for the continuous production of BNNT fibers, BNNT strands and BNNT initial yarns having few defects and good alignment. BNNTs may be formed by thermally exciting a boron feedstock in a chamber in the presence of pressurized nitrogen. BNNTs are encouraged to self-assemble into aligned BNNT fibers in a growth zone, and form BNNT strands and BNNT initial yarns, through various combinations of nitrogen gas flow direction and velocities, heat source distribution, temperature gradients, and chamber geometries.
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公开(公告)号：US20200055732A1
公开(公告)日：2020-02-20
申请号：US16349512
申请日：2017-11-29
申请人： BNNT, LLC
发明人： Thomas G. DUSHATINSKI , Kevin C. JORDAN , Michael W. SMITH , Jonathan C. STEVENS , R. Roy WHITNEY
IPC分类号： C01B21/064 , B01D9/00
摘要： Boron nitride nanotube (BNNT) material can be placed in large volume configurations such as needed for cryopumps, high surface area filters, scaffolding for coatings, transition radiation detectors, neutron detectors, and similar systems where large volumes may range from cubic millimeters to cubic meters and beyond. The technology to secure the BNNT material includes creating a scaffold of a material acceptable to the final system such as stainless steel wires for a cryopump. The BNNTs can be arranged in the scaffold by freeze drying, filtration technologies, conformal surface attachment and BNNT “glue” where the as-synthesized BNNT material has been partially purified or fully purified and dispersed in a dispersant.
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公开(公告)号：US20210155479A1
公开(公告)日：2021-05-27
申请号：US17059360
申请日：2019-05-29
申请人： BNNT, LLC
发明人： Jonathan C. STEVENS , Thomas W. HENNEBERG , Kevin C. JORDAN , Michael W. SMITH , R. Roy WHITNEY
IPC分类号： C01B21/064 , H01L21/02
摘要： High quality Boron Nitride Nanotubes (BNNTs) may be synthesized by heating a boron melt target via one or more laser diodes, including laser diode stacks. The use of a diode stack and beam shaping optics to irradiate the boron melt eliminates the need for a conventional laser cavity as has been employed with previous embodiments. The diode arrangements facilitate managing power distribution on the born melt(s), nitrogen gas flows, and blackbody radiation that drive the BNNT self-assembly process. These parameters may be used for controlling the proportions and characteristics of boron species, a-BN particles, h-BN nanocages, and h-BN nano sheets in the as-synthesized BNNT material while enhancing the quality of the BNNTs.
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公开(公告)号：US20190322529A1
公开(公告)日：2019-10-24
申请号：US16433782
申请日：2019-06-06
申请人： BNNT, LLC
IPC分类号： C01B21/064 , B01J10/00 , B01J19/08
摘要： Described herein are processes and apparatus for the large-scale synthesis of boron nit ride nanotubes (BNNTs) by induction-coupled plasma (ICP). A boron-containing feedstock may be heated by ICP in the presence of nitrogen gas at an elevated pressure, to form vaporized boron. The vaporized boron may be cooled to form boron droplets, such as nanodroplets. Cooling may take place using a condenser, for example. BNNTs may then form downstream and can be harvested.
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公开(公告)号：US20190233286A1
公开(公告)日：2019-08-01
申请号：US16379507
申请日：2019-04-09
申请人： BNNT, LLC
IPC分类号： C01B21/064 , B01J19/12
CPC分类号： C01B21/0641 , B01J19/121 , B01J2219/0871 , B01J2219/0879 , C01P2004/13
摘要： In the synthesis of boron nitride nanotubes (BNNTs) via high temperature, high pressure methods, a boron feedstock may be elevated above its melting point in a nitrogen environment at an elevated pressure. Methods and apparatus for supporting the boron feedstock and subsequent boron melt are described that enhance BNNT synthesis. A target holder having a boron nitride interface layer thermally insulates the target holder from the boron melt. Using one or more lasers as a heat source, mirrors may be positioned to reflect and control the distribution of heat in the chamber. The flow of nitrogen gas in the chamber may be heated and controlled through heating elements and flow control baffles to enhance BNNT formation. Cooling systems and baffle elements may provide additional control of the BNNT production process.
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公开(公告)号：US20210139329A1
公开(公告)日：2021-05-13
申请号：US17137040
申请日：2020-12-29
申请人： BNNT, LLC
IPC分类号： C01B21/064 , C04B35/622 , B01J10/00 , B01J19/00
摘要： High quality, catalyst-free boron nitride nanotubes (BNNTs) that are long, flexible, have few wall molecules and few defects in the crystalline structure, can be efficiently produced by a process driven primarily by Direct Induction. Secondary Direct Induction coils, Direct Current heaters, lasers, and electric arcs can provide additional heating to tailor the processes and enhance the quality of the BNNTs while reducing impurities. Heating the initial boron feed stock to temperatures causing it to act as an electrical conductor can be achieved by including refractory metals in the initial boron feed stock, and providing additional heat via lasers or electric arcs. Direct Induction processes may be energy efficient and sustainable for indefinite period of time. Careful heat and gas flow profile management may be used to enhance production of high quality BNNT at significant production rates.
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公开(公告)号：US20210040371A1
公开(公告)日：2021-02-11
申请号：US17077321
申请日：2020-10-22
申请人： BNNT, LLC
发明人： Thomas G. DUSHATINSKI , Thomas W. HENNEBERG , Clay F. HUFF , Kevin C. JORDAN , Jonathan C. STEVENS , Michael W. SMITH , R. Roy WHITNEY , Lyndsey R. SCAMMELL , Alex I. WIXTROM
IPC分类号： C09K5/14 , C01B21/064
摘要： Thermal interface materials may be enhanced through the dispersion of refined boron nitride nanotubes (BNNTs) into a polymer matrix material and one or more microfillers. A refined BNNT material may be formed by reducing free boron particle content from an as-synthesized BNNT material, and in some embodiments reducing h-BN content. Reducing these species improves the thermal conductivity of the BNNTs. Refined BNNTs may be deagglomerated to reduce the size and mass of BNNTs in agglomerations when the deagglomerated BNNT material is dispersed into a target polymer matrix material. The deagglomerated BNNT material may be lyophilized prior to dispersion in the matrix material, to retain the deagglomeration benefit following return to solid state. The surface of the deagglomerated BNNT material may be modified, with one or more functional groups that improve dispersibility and heat transfer in the target polymer matrix material.
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公开(公告)号：US20190092643A1
公开(公告)日：2019-03-28
申请号：US16204017
申请日：2018-11-29
申请人： BNNT, LLC
发明人： R. Roy WHITNEY , Thomas G. DUSHATINSKI , Thomas W. HENNEBERG , Kevin C. JORDAN , Diego PEDRAZZOLI , Jonathan C. STEVENS , Michael W. SMITH
摘要： As disclosed herein, the viscoelastic performance of boron nitride nanotube (BNNT) materials may be enhanced and made into useful formats by utilizing purified BNNTs, aligned BNNTs, isotopically enhanced BNNTs, and density controlled BNNT material. Minimizing the amounts of boron particles, a-BN particles, and h-BN nanocages, and optimizing the h-BN nanosheets has the effect of maximizing the amount of BNNT surface area present that may interact with BNNTs themselves and thereby create the nanotube-to-nanotube friction that generates the viscoelastic behavior over temperatures from near absolute zero to near 1900 K. Aligning the BNNT molecular strands with each other within the BNNT material also generates enhanced friction surfaces. The transport of phonons along the BNNT molecules may be further enhanced by utilizing isotopically enhanced BNNTs.
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公开(公告)号：US20220325162A1
公开(公告)日：2022-10-13
申请号：US17843210
申请日：2022-06-17
申请人： BNNT, LLC
发明人： Thomas G. DUSHATINSKI , Thomas W. HENNEBERG , Clay F. HUFF , Kevin C. JORDAN , Jonathan C. STEVENS , Michael W. SMITH , R. Roy WHITNEY , Lyndsey R. SCAMMELL , Alex I. WIXTROM
IPC分类号： C09K5/14 , C01B21/064
摘要： Thermal interface materials may be enhanced through the dispersion of refined boron nitride nanotubes (BNNTs) into a polymer matrix material and one or more microfillers. A refined BNNT material may be formed by reducing free boron particle content from an as-synthesized BNNT material, and in some embodiments reducing h-BN content. Reducing these species improves the thermal conductivity of the BNNTs. Refined BNNTs may be deagglomerated to reduce the size and mass of BNNTs in agglomerations when the deagglomerated BNNT material is dispersed into a target polymer matrix material. The deagglomerated BNNT material may be lyophilized prior to dispersion in the matrix material, to retain the deagglomeration benefit following return to solid state. The surface of the deagglomerated BNNT material may be modified, with one or more functional groups that improve dispersibility and heat transfer in the target polymer matrix material.
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公开(公告)号：US20200283669A1
公开(公告)日：2020-09-10
申请号：US16512857
申请日：2019-07-16
申请人： BNNT, LLC
发明人： Thomas G. DUSHATINSKI , Thomas W. HENNEBERG , Clay F. HUFF , Kevin C. JORDAN , Jonathan C. STEVENS , Michael W. SMITH , R. Roy WHITNEY , Lyndsey R. SCAMMELL , Alex I. WIXTROM
IPC分类号： C09K5/14 , C01B21/064
摘要： Thermal interface materials may be enhanced through the dispersion of refined boron nitride nanotubes (BNNTs) into a polymer matrix material and one or more microfillers. A refined BNNT material may be formed by reducing free boron particle content from an as-synthesized BNNT material, and in some embodiments reducing h-BN content. Reducing these species improves the thermal conductivity of the BNNTs. Refined BNNTs may be deagglomerated to reduce the size and mass of BNNTs in agglomerations when the deagglomerated BNNT material is dispersed into a target polymer matrix material. The deagglomerated BNNT material may be lyophilized prior to dispersion in the matrix material, to retain the deagglomeration benefit following return to solid state. The surface of the deagglomerated BNNT material may be modified, with one or more functional groups that improve dispersibility and heat transfer in the target polymer matrix material.
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