Lg Chem, Ltd

Se-Hui Sohn

Tae-Hoon Kim

Cheol-Hee Park

Seung-Tae Hong

Won-Jong Kwon

Yong-Ho Lee

Ki-Soo Lee

Min-Seok Cho

Heon-Yong Kwon

Dae-Sik Hong

Seon-Kyoung Kim

Kyoung-Chan Lim

Man-Seong Jeon

Thermoelectric conversion materials, expressed by the following formula: BiMCuOQ1TeQ2. Here, M is at least one element selected from the group consisting of Ba, Sr, Ca, Mg, Cs, K, Na, Cd, Hg, Sn, Pb, Mn, Ga, In, Tl, As and Sb; Q1 and Q2 are at least one element selected from the group consisting of S, Se, As and Sb; x, y, z, w, a, and b are 0&#x2266;x&#x3c;1, 0&#x3c;w&#x3c;1, 0.2&#x3c;a&#x3c;4, 0&#x2266;y&#x3c;4, 0.2&#x3c;b&#x3c;4, 0&#x2266;z&#x3c;4 and x+y+z&#x3e;0. These thermoelectric conversion materials may be used for thermoelectric conversion elements, where they may replace thermoelectric conversion materials in common use, or be used along with thermoelectric conversion materials in common use.

Thermoelectric conversion material and producing method thereof, and thermoelectric conversion element using the same

Compound semiconductors, expressed by the following formula: BiMCuOQ1TeQ2. Here, M is at least one element selected from the group consisting of Ba, Sr, Ca, Mg, Cs, K, Na, Cd, Hg, Sn, Pb, Eu, Sm, Mn, Ga, In, Tl, As and Sb; Q1 and Q2 are at least one element selected from the group consisting of S, Se, As and Sb; x, y, z, w, a, and b are 0&#x2266;x&#x3c;1, 0&#x3c;w&#x2266;1, 0.2&#x3c;a&#x3c;4, 0&#x2266;y&#x3c;4, 0.2&#x3c;b&#x3c;4 and 0&#x2266;z&#x3c;4. These compound semiconductors may be used for various applications such as solar cells or thermoelectric conversion elements, where they may replace compound semiconductors in common use, or be used along with compound semiconductors in common use.

The present description relates to olefin block copolymers having excellent elasticity and processability in conjunction with enhanced heat resistance, and to a preparation method thereof. The olefin block copolymers comprise a plurality of blocks or segments that comprise ethylene or propylene repeating units and &#x3b1;-olefin repeating units at different mole fractions from one another, wherein the block copolymer shows peaks at the 2&#x3b8; of 21.5&#xb1;0.5&#xb0; and 23.7&#xb1;0.5&#xb0; in a wide-angle x-ray diffraction (WAXD) pattern, and the peak ratio defined by (the peak area at 21.5&#xb1;0.5&#xb0;)/(the peak area at 23.7&#xb1;0.5&#xb0;) is no more than 3.0.

Olefin block copolymers and production methods thereof

Thermoelectric conversion materials, expressed by the following formula: BiMCuOQ1TeQ2. Here, M is at least one element selected from the group consisting of Ba, Sr, Ca, Mg, Cs, K, Na, Cd, Hg, Sn, Pb, Mn, Ga, In, Tl, As and Sb; Q1 and Q2 are at least one element selected from the group consisting of S, Se, As and Sb; x, y, z, w, a, and b are 0&#x2266;x&#x3c;1, 0&#x3c;w&#x2266;1, 0.2&#x3c;a&#x3c;4, 0&#x2266;y&#x3c;4, 0.2&#x3c;b&#x3c;4 and 0&#x2266;z&#x3c;4. These thermoelectric conversion materials may be used for thermoelectric conversion elements, where they may replace thermoelectric conversion materials in common use, or be used along with thermoelectric conversion materials in common use.

Thermoelectric conversion material and producing method thereof; and thermoelectric conversion element using the same

Disclosed is a new thermoelectric conversion material represented by the chemical formula 1: BiCuOTe, where 0&#x2266;x&#x3c;1, 0&#x2266;y&#x3c;1, 0&#x2266;z&#x3c;1 and x+y+z&#x3e;0. A thermoelectric conversion device using said thermoelectric conversion material has good energy conversion efficiency.

Thermoelectric conversion material and its manufacturing method, and thermoelectric conversion device using the same

Thermoelectric conversion materials, expressed by the following formula: BiMCuOQ1TeQ2. Here, M is at least one element selected from the group consisting of Ba, Sr, Ca, Mg, Cs, K, Na, Cd, Hg, Sn, Pb, Eu, Sm, Mn, Ga, In, Ti, As and Sb; Q1 and Q2 are at least one element selected from the group consisting of S, Se, As and Sb; x, y, z, w, a, and b are 0&#x2266;x&#x3c;1, 0&#x3c;w&#x2266;1, 0.2&#x3c;a&#x3c;4, 0&#x2266;y&#x3c;4, 0.2&#x3c;b&#x3c;4 and 0&#x2266;z&#x3c;4. These thermoelectric conversion materials may be used for thermoelectric conversion elements, where they may replace thermoelectric conversion materials in common use, or be used along with thermoelectric conversion materials in common use.

Disclosed is a new compound semiconductor represented by the chemical formula: BiLnMCuOTe where Ln belongs to the lanthanoid series and is any one or more elements selected from the group consisting of La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb and Lu, M is any one or more elements selected from the group consisting of Ba, Sr, Ca, Mg, Cd, Hg, Sn, Pb, Mn, Ga, In, Tl, As and Sb, and 0&#x3c;x&#x3c;1, 0&#x2266;y&#x2266;1 and 0&#x3c;x+y&#x3c;1. The compound semiconductor can replace a conventional compound semiconductor or be used as a thermoelectric conversion device together with a conventional compound semiconductor.

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Daejeon, South Korea

Se-Hui Sohn