JP2011523394A - 新規な化合物半導体及びその製造方法、並びにそれを用いた熱電変換素子 - Google Patents
新規な化合物半導体及びその製造方法、並びにそれを用いた熱電変換素子 Download PDFInfo
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- 150000001875 compounds Chemical class 0.000 title claims abstract description 47
- 239000004065 semiconductor Substances 0.000 title claims abstract description 41
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 37
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 239000000126 substance Substances 0.000 claims abstract description 17
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 13
- 229910052688 Gadolinium Inorganic materials 0.000 claims abstract description 10
- 229910052745 lead Inorganic materials 0.000 claims abstract description 10
- 229910052775 Thulium Inorganic materials 0.000 claims abstract description 9
- 229910052787 antimony Inorganic materials 0.000 claims abstract description 9
- 229910052785 arsenic Inorganic materials 0.000 claims abstract description 9
- 229910052793 cadmium Inorganic materials 0.000 claims abstract description 8
- 229910052733 gallium Inorganic materials 0.000 claims abstract description 8
- 229910052738 indium Inorganic materials 0.000 claims abstract description 8
- 229910052748 manganese Inorganic materials 0.000 claims abstract description 8
- 229910052716 thallium Inorganic materials 0.000 claims abstract description 8
- 229910052684 Cerium Inorganic materials 0.000 claims abstract description 7
- 229910052692 Dysprosium Inorganic materials 0.000 claims abstract description 7
- 229910052691 Erbium Inorganic materials 0.000 claims abstract description 7
- 229910052693 Europium Inorganic materials 0.000 claims abstract description 7
- 229910052689 Holmium Inorganic materials 0.000 claims abstract description 7
- 229910052765 Lutetium Inorganic materials 0.000 claims abstract description 7
- 229910052779 Neodymium Inorganic materials 0.000 claims abstract description 7
- 229910052777 Praseodymium Inorganic materials 0.000 claims abstract description 7
- 229910052772 Samarium Inorganic materials 0.000 claims abstract description 7
- 229910052771 Terbium Inorganic materials 0.000 claims abstract description 7
- 229910052769 Ytterbium Inorganic materials 0.000 claims abstract description 7
- 229910052788 barium Inorganic materials 0.000 claims abstract description 7
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 7
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 7
- 229910052712 strontium Inorganic materials 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 16
- 239000000843 powder Substances 0.000 claims description 13
- 238000005245 sintering Methods 0.000 claims description 6
- 229910015902 Bi 2 O 3 Inorganic materials 0.000 claims description 4
- 229910052797 bismuth Inorganic materials 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 229910052714 tellurium Inorganic materials 0.000 claims description 3
- FZLIPJUXYLNCLC-UHFFFAOYSA-N lanthanum atom Chemical group [La] FZLIPJUXYLNCLC-UHFFFAOYSA-N 0.000 abstract description 3
- 150000002603 lanthanum Chemical class 0.000 description 8
- 238000002441 X-ray diffraction Methods 0.000 description 7
- 230000003647 oxidation Effects 0.000 description 6
- 238000007254 oxidation reaction Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 239000013078 crystal Substances 0.000 description 5
- 238000003786 synthesis reaction Methods 0.000 description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000969 carrier Substances 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 238000010248 power generation Methods 0.000 description 3
- 238000006467 substitution reaction Methods 0.000 description 3
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052739 hydrogen Inorganic materials 0.000 description 2
- 239000001257 hydrogen Substances 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 230000005679 Peltier effect Effects 0.000 description 1
- 238000004774 atomic orbital Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052732 germanium Inorganic materials 0.000 description 1
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
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Abstract
【解決手段】本発明は、次の化学式で表される新規な化合物半導体を提供する(Bi1-x-yLnxMyCuOTe)。化学式において、Lnはランタン族元素であってLa、Ce、Pr、Nd、Pm、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb及びLuからなる群より選択されたいずれか1つまたはそのうちの2種以上の元素であり、MはBa、Sr、Ca、Mg、Cd、Hg、Sn、Pb、Mn、Ga、In、Tl、As及びSbからなる群より選択されたいずれか1つまたはそのうちの2種以上の元素であり、0<x<1、0≦y<1及び0<x+y<1である。前記化合物半導体は従来の化合物半導体に代替するかまたは従来の化合物半導体に加え、熱電変換素子などの用途に用いられ得る。
【選択図】 図4
Description
BiCuOTeの合成
まず、BiCuOTeを合成するため、Bi2O3(Aldrich、99.9%、100mesh)1.1198g、Bi(Aldrich、99.99%、<10m)0.5022g、Cu(Aldrich、99.7%、3m)0.4581g、Te(Aldrich、99.99%、〜100mesh)0.9199gをめのう乳鉢(agate mortar)を用いてよく混合した。混合した材料はシリカチューブに入れて真空密封し、510℃で15時間加熱することでBiCuOTe粉末を得た。
Bi0.9Ln0.1CuOTeの合成
ランタン系列元素(Ln=La、Gd、Tm;それぞれ実施例1〜3)によってBiの一部を置換するためにランタン系列元素の酸化物(Ln2O3)粉末を用意して加えたことを除き、前述した参照例1と基本的に同様の方法でBi0.9Ln0.1CuOTeを合成した。合成のための各原料粉末の混合量は次のようである(単位:g)。
Bi0.9-xLa0.1PbxCuOTeの合成
酸化数が相対的に小さい元素(M)としてPbをその酸化物(PbO)の粉末状で用意し混合量を変えながら加えたことを除き、前述した実施例1と基本的に同様の方法でBi0.9-xLa0.1PbxCuOTeを合成した。また、参照例2としてBiの一部をPbのみによって置換したBi0.995Pb0.005CuOTeを合成し、Pbの置換量を変えた参照例3としてBi0.98Pb0.02CuOTeを合成した。合成のための各原料粉末の混合量は次のようである(単位:g)。
前述した方法で合成した参照例と実施例の各試料のうち一部をそれぞれ直径4mm、長さ15mmの円柱に成形した後、CIP(Cold Isostatic Press)を使用して200MPaの圧力を印加した。次いで、得られた結果物を石英管に入れて510℃で10時間真空焼結した。
Claims (9)
- 化学式1のLnが、La、Gd及びTmからなる群より選択されたいずれか1つであることを特徴とする請求項1に記載の化合物半導体。
- 化学式1のMがPbであることを特徴とする請求項2に記載の化合物半導体。
- 化学式1のx及びyが、それぞれ0<x≦0.5及び0≦y≦0.5であることを特徴とする請求項1に記載の化合物半導体。
- 化学式1のx及びyが、それぞれ0<x<0.2及び0≦y<0.1であることを特徴とする請求項4に記載の化合物半導体。
- 化学式1のyが0であることを特徴とする請求項1に記載の化合物半導体。
- Bi2O3、Bi、Cu及びTeの各粉末と、La、Ce、Pr、Nd、Pm、Sm、Eu、Gd、Tb、Dy、Ho、Er、Tm、Yb及びLuからなる群より選択されたいずれか1つまたはそのうちの2種以上の元素またはその酸化物からなる粉末とを混合し、選択的にBa、Sr、Ca、Mg、Cd、Hg、Sn、Pb、Mn、Ga、In、Tl、As及びSbからなる群より選択されたいずれか1つまたはそのうちの2種以上の元素またはその酸化物からなる粉末を混合した後、焼結することで請求項1に記載の化学式1で表される化合物半導体を製造する方法。
- 前記焼結時の温度が400から570℃であることを特徴とする請求項7に記載の化合物半導体を製造する方法。
- 請求項1から請求項6のうちいずれか1項に記載の化合物半導体を熱電変換材料として含む熱電変換素子。
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PCT/KR2009/004872 WO2010024637A2 (ko) | 2008-08-29 | 2009-08-31 | 신규한 화합물 반도체 및 그 제조 방법과, 이를 이용한 열전 변환 소자 |
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EP (3) | EP2319082B1 (ja) |
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JP2017507872A (ja) * | 2013-11-29 | 2017-03-23 | エルジー・ケム・リミテッド | 新規な化合物半導体及びその活用 |
JP2017517473A (ja) * | 2014-04-04 | 2017-06-29 | ローディア オペレーションズ | 光電池用途のための混合酸化および硫化ビスマスおよび銅 |
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US9660165B2 (en) | 2008-08-29 | 2017-05-23 | Lg Chem, Ltd. | Thermoelectric conversion material and producing method thereof, and thermoelectric conversion element using the same |
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