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：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：US09978924B2

公开(公告)日：2018-05-22

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： H01L35/12 ,  H01L35/26 ,  H01L35/22 ,  C01B19/00 ,  H01L35/14 ,  H01L35/34

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.

公开(公告)号：US20120298924A1

公开(公告)日：2012-11-29

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： H01B1/00 ,  B82Y40/00

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

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.

摘要翻译： 一种具有多个晶粒和晶界的热电材料的制造方法。 该方法包括确定要研究的热电材料的材料组成，然后确定使用现有技术制造技术的材料组合物可获得的晶粒尺寸和/或晶界势垒高度的范围。 此后，根据晶粒尺寸和/或晶界势垒高度的值的范围确定材料组成的品质因数值的范围。 最后，制造具有确定的材料组成和平均晶粒尺寸和晶界势垒高度对应于品质因数值的最大范围的热电材料。

公开(公告)号：US20130330225A1

公开(公告)日：2013-12-12

申请号：US13491440

申请日：2012-06-07

申请人： Junya Murai ,  Takuji Kita ,  Debasish Banerjee

发明人： Junya Murai ,  Takuji Kita ,  Debasish Banerjee

IPC分类号： B22F3/12 ,  B82Y99/00

CPC分类号： C22C1/0491 ,  B22F2998/10 ,  B82Y30/00 ,  C22C32/0015 ,  B22F9/24 ,  B22F3/105

摘要： A nanocomposite thermoelectric conversion material capable of improving enhancement of ZT by reducing the thermal conductivity is provided by a production method for a nanocomposite thermoelectric conversion material composed of a matrix and a nanoparticle, the method comprising selecting the combination of at least three kinds of elements such that out of, one kind of an element becomes an oxide in the form of a nanoparticle; dissolving the elements such that the amount of the element constituting the nanoparticle becomes excessive with respect to the composition of the matrix in the final target product; adding a reducing agent to the solution, thereby allowing a reduction reaction to proceed at a plurality of different pH values from the initiation to the termination of reaction; and performing a hydrothermal treatment to cause formation of the matrix by alloying and formation of a nanoparticle composed of the oxide.

摘要翻译： 通过由基体和纳米粒子组成的纳米复合热电转换材料的制造方法，能够提高通过降低热传导率而提高ZT的纳米复合热电转换材料，该方法包括选择至少三种元素的组合 一种元素中的一种成为纳米颗粒形式的氧化物; 溶解元素，使得构成纳米颗粒的元素的量相对于最终目标产物中的基质的组成变得过大; 向溶液中加入还原剂，从而使反应开始至终止反应的多个不同pH值进行还原反应; 并进行水热处理以通过合金化和由氧化物构成的纳米颗粒的形成来形成基质。

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：US08889027B2

公开(公告)日：2014-11-18

申请号：US13422318

申请日：2012-03-16

申请人： Takuji Kita ,  Junnya Murai ,  Tomoharu Kataoka ,  Michael Paul Rowe

发明人： Takuji Kita ,  Junnya Murai ,  Tomoharu Kataoka ,  Michael Paul Rowe

IPC分类号： H01L35/16 ,  H01L35/18

CPC分类号： H01L35/16 ,  C01B19/007 ,  C01P2004/04 ,  C01P2006/40 ,  H01L35/26

摘要： A nanocomposite thermoelectric conversion material composed of a Bi2(Te1-xSex)3 thermoelectric conversion material (where 0≦x

摘要翻译： 由Bi2（Te1-xSex）3热电转换材料（其中0＆nlE; x <1））作为其中分散陶瓷声子散射颗粒的基体组成的纳米复合热电转换材料。 通过将Bi络合物的第一水溶液调节至比声子散射粒子的等电点高的pH值而制备的纳米复合热电转换材料，将未表面改性的声子散射粒子加入到pH调节的第一水溶液中， 已经加入了声子散射颗粒的第一水溶液和至少包含前阴离子和阴离子的第二水溶液。

公开(公告)号：US20140174493A1

公开(公告)日：2014-06-26

申请号：US14237443

申请日：2012-08-09

申请人： Junya Murai ,  Takuji Kita

发明人： Junya Murai ,  Takuji Kita

IPC分类号： H01L35/16

CPC分类号： H01L35/16 ,  H01L35/26

摘要： A nanocomposite thermoelectric conversion material includes a matrix and semiconductor nanowires dispersed as a dispersant in the matrix. The semiconductor nanowires are arranged unidirectionally in a long axis direction of the semiconductor nanowires.

摘要翻译： 纳米复合热电转换材料包括在基质中作为分散剂分散的基质和半导体纳米线。 半导体纳米线在半导体纳米线的长轴方向上单向排列。