公开(公告)号：US10811160B2

公开(公告)日：2020-10-20

申请号：US13117286

申请日：2011-05-27

申请人： Debasish Banerjee ,  Minjuan Zhang ,  Takuji Kita

发明人： Debasish Banerjee ,  Minjuan Zhang ,  Takuji Kita

IPC分类号： H01L35/34 ,  H01B1/02 ,  B82Y40/00 ,  H01L35/26

摘要： A process for manufacturing a thermoelectric material having a plurality of grains and grain boundaries. The process includes determining a material composition to be investigated for the thermoelectric material and then determining a range of values of grain size and/or grain boundary barrier height obtainable for the material composition using current state of the art manufacturing techniques. Thereafter, a range of figure of merit values for the material composition is determined as a function of the range of values of grain size and/or grain boundary barrier height. And finally, a thermoelectric material having the determined material composition and an average grain size and grain boundary barrier height corresponding to the maximum range of figure of merit values is manufactured.

公开(公告)号：US20130221290A1

公开(公告)日：2013-08-29

申请号：US13883000

申请日：2011-11-07

申请人： Junya Murai ,  Takuji Kita

发明人： Junya Murai ,  Takuji Kita

IPC分类号： H01L35/02

CPC分类号： H01L35/02 ,  B82Y30/00 ,  B82Y40/00 ,  C01B19/002 ,  C01B19/007 ,  C01P2002/60 ,  C01P2002/78 ,  C01P2004/04 ,  C01P2006/40 ,  H01L35/14 ,  H01L35/16 ,  H01L35/18 ,  H01L35/20 ,  H01L35/26 ,  H01L35/34

摘要： A nanocomposite thermoelectric conversion material is provided in which crystal grains of a thermoelectric material parent phase are stacked in a laminar configuration and are oriented, the width of the crystal grains perpendicular to the direction of this orientation is in a range from at least 5 nm to less than 20 nm, and insulating nanoparticles are present dispersed at the grain boundaries. Also provided is a method of producing a nanocomposite thermoelectric conversion material, by which the crystal grains of a thermoelectric material parent phase are oriented by cooling a material under compression at a cooling rate of at least 1° C./minute to less than 20° C./minute. A thermoelectric conversion element that contains the aforementioned nanocomposite thermoelectric conversion material is also provided.

摘要翻译： 提供了一种纳米复合热电转换材料，其中热电材料母相的晶粒以层叠形式层叠并且取向，与该取向方向垂直的晶粒的宽度在至少5nm至 小于20nm，绝缘纳米颗粒分散在晶界处。 还提供了一种制造纳米复合热电转换材料的方法，通过该方法，热电材料母相的晶粒通过以至少1℃/分钟至小于20度的冷却速度在压缩下冷却材料而取向 C./分钟 还提供了含有上述纳米复合热电转换材料的热电转换元件。

公开(公告)号：US08394284B2

公开(公告)日：2013-03-12

申请号：US12663019

申请日：2008-05-28

申请人： Junya Murai ,  Takuji Kita

发明人： Junya Murai ,  Takuji Kita

IPC分类号： H01L35/26 ,  H01L35/34 ,  H01L35/18 ,  C22C12/00 ,  B22F1/02 ,  B22F9/24

CPC分类号： C22C12/00 ,  B22F1/025 ,  B22F9/24 ,  B22F2998/00 ,  C22C18/00 ,  C22C23/00 ,  H01L35/18 ,  H01L35/26 ,  H01L35/34 ,  B22F1/0018 ,  B22F1/0044

摘要： A thermoelectric converter made of a thermoelectric conversion material is provided in which metal or alloy particles having an average particle size of 1 to 100 nm are dispersed, wherein at least a part of the metal or alloy particles are dispersed at a distance not more than the mean free path of the phonon of the thermoelectric conversion material.

摘要翻译： 提供一种由热电转换材料制成的热电转换器，其中分散平均粒径为1至100nm的金属或合金颗粒，其中至少部分金属或合金颗粒以不大于 热电转换材料的声子的平均自由程。

公开(公告)号：US20120326075A1

公开(公告)日：2012-12-27

申请号：US13166860

申请日：2011-06-23

申请人： Debasish Banerjee ,  Minjuan Zhang ,  Takuji Kita

发明人： Debasish Banerjee ,  Minjuan Zhang ,  Takuji Kita

IPC分类号： H01B1/14 ,  C09K5/14 ,  B82B3/00

CPC分类号： H01L35/26 ,  C01B19/007 ,  H01L35/14 ,  H01L35/22 ,  H01L35/34

摘要： A process for manufacturing a nanocomposite thermoelectric material having a plurality of nanoparticle inclusions. The process includes determining a material composition to be investigated for the nanocomposite thermoelectric material, the material composition including a conductive bulk material and a nanoparticle material. In addition, a range of surface roughness values for the insulating nanoparticle material that can be obtained using current state of the art manufacturing techniques is determined. Thereafter, a plurality of Seebeck coefficients, electrical resistivity values, thermal conductivity values and figure of merit values as a function of the range of nanoparticle material surface roughness values is calculated. Based on these calculated values, a nanocomposite thermoelectric material composition or ranges of compositions is/are selected and manufactured.

摘要翻译： 一种具有多个纳米粒子夹杂物的纳米复合热电材料的制造方法。 该方法包括确定纳米复合热电材料要研究的材料组成，该材料组合物包括导电体材料和纳米颗粒材料。 此外，确定可以使用现有技术制造技术获得的绝缘纳米颗粒材料的一系列表面粗糙度值。 此后，计算多个塞贝克系数，电阻率值，热导率值和作为纳米颗粒材料表面粗糙度值的范围的函数的品质因数值。 基于这些计算值，选择和制造纳米复合热电材料组成或组合范围。

公开(公告)号：US20090314324A1

公开(公告)日：2009-12-24

申请号：US12096540

申请日：2006-12-07

申请人： Junya Murai ,  Takuji Kita

发明人： Junya Murai ,  Takuji Kita

IPC分类号： H01L35/34 ,  H01L35/12

CPC分类号： H01L35/34 ,  H01L35/18

摘要： A thermoelectric conversion material wherein at least a part of the insulating material contained in the thermoelectric conversion material has a particle size not larger than a mean free path of the phonons in the insulating material or wherein a dispersion gap of the insulating material is not larger than a mean free path of the phonons in the thermoelectric conversion material, and a method of producing the thermoelectric conversion material comprising the steps of forming composite nano particles by reducing and precipitating starting particles of a thermoelectric conversion material on the nano particles constituted by an insulating material, followed by a heat treatment to coat the nano particles with the thermoelectric conversion material; and packing and sintering the composite nano particles.

摘要翻译： 一种热电转换材料，其中包含在所述热电转换材料中的所述绝缘材料的至少一部分具有不大于所述绝缘材料中的所述声子的平均自由程的粒径，或者所述绝缘材料的分散间隙不大于 热电转换材料中的声子的平均自由程，以及制造该热电转换材料的方法，包括以下步骤：通过在由绝缘材料构成的纳米颗粒上还原和沉淀热电转换材料的起始粒子来形成复合纳米颗粒 ，然后进行热处理以用热电转换材料涂覆纳米颗粒; 并对复合纳米颗粒进行包装和烧结。

公开(公告)号：US20080190475A1

公开(公告)日：2008-08-14

申请号：US11885662

申请日：2006-03-03

申请人： Takuji Kita

发明人： Takuji Kita

IPC分类号： H01L35/14 ,  C01F11/00 ,  C01G17/00

CPC分类号： C22C28/00 ,  B22F2998/10 ,  B22F2999/00 ,  C22C1/0491 ,  H01L35/22 ,  B22F9/04 ,  B22F3/105 ,  B22F2202/13

摘要： The present invention provides a thermoelectric material comprised of a clathrate compound expressed by Ba8GaXGe(44-X), where 14≦X≦18. This thermoelectric material does not require the conventionally indispensible long heat treatment yet is provided with a superior thermoelectric property equal to the past.

摘要翻译： 本发明提供了一种热电材料，其包含由Ba≡Si≡Si（44-X）compound表示的包合物化合物，其中14 <= X <= 18。 该热电材料不需要常规不可缺少的长时间热处理，而具有与过去相同的优良热电性能。

公开(公告)号：US08828277B2

公开(公告)日：2014-09-09

申请号：US13377876

申请日：2010-06-18

申请人： Junya Murai ,  Takuji Kita

发明人： Junya Murai ,  Takuji Kita

IPC分类号： H01B1/02 ,  C22C32/00 ,  C22C1/04 ,  H01L35/16 ,  B22F9/24 ,  H01L35/26 ,  H01L35/34

CPC分类号： B22F9/24 ,  B22F2998/10 ,  C22C1/0491 ,  C22C32/0015 ,  H01L35/16 ,  H01L35/26 ,  H01L35/34 ,  Y10S977/779 ,  Y10T428/29 ,  B22F1/0022 ,  B22F1/0085

摘要： A method of producing a nanocomposite thermoelectric conversion material includes preparing a solution that contains salts of a plurality of first elements constituting a thermoelectric conversion material, and a salt of a second element that has a redox potential lower than redox potentials of the first elements; precipitating the first elements, thereby producing a matrix-precursor that is a precursor of a matrix made of the thermoelectric conversion material, by adding a reducing agent to the solution; precipitating the second element in the matrix-precursor, thereby producing slurry containing the first elements and the second element, by further adding the reducing agent to the solution; and alloying the plurality of the first elements, thereby producing the matrix (70) made of the thermoelectric conversion material, and producing nano-sized phonon-scattering particles (80) including the second element, which are dispersed in the matrix (70), by filtering and washing the slurry, and then, heat-treating the slurry.

摘要翻译： 制备纳米复合热电转换材料的方法包括制备含有构成热电转换材料的多个第一元素的盐和具有低于第一元素的氧化还原电位的氧化还原电位的第二元素的盐的溶液; 沉淀第一元素，由此制备作为由热电转换材料制成的基体的前体的基质前体，通过向溶液中加入还原剂; 使基体前体中的第二元素沉淀，从而通过进一步向还原剂中加入还原剂，从而产生含有第一元素和第二元素的浆液; 并且使多个第一元件合金化，由此制造由热电转换材料制成的基体（70），并且分散在基体（70）中的纳米尺寸的包含第二元素的声子散射粒子（80） 通过过滤和洗涤浆料，然后对浆料进行热处理。

公开(公告)号：US20120217447A1

公开(公告)日：2012-08-30

申请号：US13503743

申请日：2010-10-20

申请人： Junya Murai ,  Takuji Kita

发明人： Junya Murai ,  Takuji Kita

IPC分类号： H01B1/00 ,  B82Y40/00 ,  B82Y30/00

CPC分类号： H01L33/26 ,  H01L33/16 ,  H01L35/16 ,  H01L35/26 ,  Y10S977/833

摘要： A nanocomposite thermoelectric conversion material (100) includes a crystalline matrix (102) made of a thermoelectric conversion material; and phonon-scattering particles (108) dispersed in the crystalline matrix (102). Each phonon-scattering particle (108) includes at least one amorphous nanoparticle (106) coated with a crystalline film (104) having a nano-order thickness, and the crystalline structure of the crystalline film (104) is different from the crystalline structure of the thermoelectric conversion material. The nanocomposite thermoelectric conversion material (100) is produced by i) precipitating a matrix-precursor oversaturated with one element of the thermoelectric conversion material, around the amorphous nanoparticles, thereby producing nanocomposite particles, and heat-treating the nanocomposite particles, or ii) by precipitating only one element of the thermoelectric conversion material around the amorphous nanoparticles, thereby producing first nanocomposite particles, and then, precipitating the matrix-precursor made of the thermoelectric conversion material, around the first nanocomposite particles, thereby producing second nano composite particles, and heat-treating the second nanocomposite particles.

摘要翻译： 纳米复合热电转换材料（100）包括由热电转换材料制成的结晶基体（102）; 和分散在晶体（102）中的声子散射颗粒（108）。 每个声子散射颗粒（108）包括涂覆有具有纳米级厚度的结晶膜（104）的至少一个无定形纳米颗粒（106），并且结晶膜（104）的晶体结构不同于 热电转换材料。 该纳米复合热电转换材料（100）通过以下步骤来制造：i）使由一个元件的热电转换材料过饱和的基体前体沉淀在无定形纳米颗粒周围，从而制备纳米复合材料颗粒，并对纳米复合材料颗粒进行热处理，或ii） 在该无定形纳米颗粒周围只沉淀出一个元件的热电转换材料，由此产生第一纳米复合材料颗粒，然后使由该热电转换材料制成的基体前体沉淀在第一纳米复合材料颗粒周围，从而产生第二纳米复合颗粒，并加热 - 将第二纳米复合材料颗粒。

公开(公告)号：US20090151766A1

公开(公告)日：2009-06-18

申请号：US12332760

申请日：2008-12-11

申请人： Junya Murai ,  Takuji Kita

发明人： Junya Murai ,  Takuji Kita

IPC分类号： H01L35/34

CPC分类号： H01L35/34 ,  H01L35/16

摘要： A method of producing a thermoelectric conversion element includes preparing a dispersion liquid by mixing slurry containing ceramic particles With salts of at least two elements that constitute a thermoelectric conversion material, and then, precipitating the at least two elements that constitute the thermoelectric conversion material on the ceramic particles in the dispersion liquid; performing washing; performing heating treatment; and performing sintering. Contact between a solution with a pH lower than 1 among solutions of the salts and the slurry containing the ceramic particles is avoided, or the solution with the pH lower than 1 contacts the slurry containing the ceramic particles for a first time when the at least two elements that constitute the thermoelectric conversion material are precipitated.

摘要翻译： 制造热电转换元件的方法包括通过将含有陶瓷颗粒的浆料与构成热电转换材料的至少两种元素的盐混合，然后将构成热电转换材料的至少两种元素沉淀在 分散液中的陶瓷颗粒; 进行洗涤; 进行加热处理; 并进行烧结。 避免了盐溶液中含有低于1的溶液与含有陶瓷颗粒的浆料之间的pH值低于1的溶液与pH值低于1的溶液首次接触含有陶瓷颗粒的浆料，当至少两次 构成热电转换材料的元素沉淀。

公开(公告)号：US08617918B2

公开(公告)日：2013-12-31

申请号：US12602820

申请日：2008-06-05

申请人： Junya Murai ,  Takuji Kita

发明人： Junya Murai ,  Takuji Kita

IPC分类号： H01L21/00 ,  H01L35/16 ,  H01L35/00

CPC分类号： H01L35/34 ,  C22C1/0491 ,  H01L35/16

摘要： A thermoelectric converter is made of a first thermoelectric conversion material in which at least one type of second thermoelectric conversion material particles having an average size of 1 to 100 nm is dispersed. At least a part of the second thermoelectric conversion material particles is dispersed at a distance not more than the mean free path of the phonons of the first thermoelectric conversion material.

摘要翻译： 热电转换器由第一热电转换材料制成，其中分散平均尺寸为1至100nm的至少一种第二热电转换材料颗粒。 第二热电转换材料颗粒的至少一部分以不大于第一热电转换材料的声子的平均自由程的距离分散。