Thermodynamic Properties of Nd 1+ x Ba 2– x Cu 3 O y Compounds and Their Application for Optimizing the Synthesis of Superconducting Materials
The standard enthalpies of formation from oxides of Nd 1+ x Ba 2– x Cu 3 O y , where x = 0–0.8 and y = 6.65–7.24, were determined by using dissolution enthalpies of these compounds measured by solution calorimetry. The temperature dependence of the heat capacity of NdBa 2 Cu 3 O 6.87 wasmeasured ove...
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| Veröffentlicht in: | European journal of inorganic chemistry 2009-03, Vol.2009 (8), p.1096-1102 |
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| container_title | European journal of inorganic chemistry |
| container_volume | 2009 |
| creator | Zelenina, Ludmila N. Chusova, Tamara P. Matskevich, Nata I. Naumov, Victor N. Stenin, Yuri G. Krabbes, Gernot |
| description | The standard enthalpies of formation from oxides of Nd
1+
x
Ba
2–
x
Cu
3
O
y
, where
x
= 0–0.8 and
y
= 6.65–7.24, were determined by using dissolution enthalpies of these compounds measured by solution calorimetry. The temperature dependence of the heat capacity of NdBa
2
Cu
3
O
6.87
wasmeasured over the range 5–320 K by adiabatic calorimetry. The absolute entropy,
S°
(
T
), the enthalpy of heating,
H°
(
T
K) –
H°
(0 K), and the reduced Gibbs energy,
Φ
°
(
T
) =
S°
(
T
) – [
H°
(
T
) –
H°
(
0
)]/
T
, were calculated by using the temperature dependence of
C
p
in the interval 0–320 K. The heat capacity and absolute entropy of NdBa
2
Cu
3
O
6.87
over the temperature range 320–1380 K were estimated by methods of quantum chemistry with use of the temperature dependence of
C
p
at low temperatures. A thermodynamic simulation was performed on the basis of the obtained data, and the conditions for synthesis of the NdBa
2
Cu
3
O
6.9
phase were determined.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009) |
| doi_str_mv | 10.1002/ejic.200800745 |
| format | Article |
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1+
x
Ba
2–
x
Cu
3
O
y
, where
x
= 0–0.8 and
y
= 6.65–7.24, were determined by using dissolution enthalpies of these compounds measured by solution calorimetry. The temperature dependence of the heat capacity of NdBa
2
Cu
3
O
6.87
wasmeasured over the range 5–320 K by adiabatic calorimetry. The absolute entropy,
S°
(
T
), the enthalpy of heating,
H°
(
T
K) –
H°
(0 K), and the reduced Gibbs energy,
Φ
°
(
T
) =
S°
(
T
) – [
H°
(
T
) –
H°
(
0
)]/
T
, were calculated by using the temperature dependence of
C
p
in the interval 0–320 K. The heat capacity and absolute entropy of NdBa
2
Cu
3
O
6.87
over the temperature range 320–1380 K were estimated by methods of quantum chemistry with use of the temperature dependence of
C
p
at low temperatures. A thermodynamic simulation was performed on the basis of the obtained data, and the conditions for synthesis of the NdBa
2
Cu
3
O
6.9
phase were determined.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)</description><identifier>ISSN: 1434-1948</identifier><identifier>EISSN: 1099-0682</identifier><identifier>DOI: 10.1002/ejic.200800745</identifier><language>eng</language><ispartof>European journal of inorganic chemistry, 2009-03, Vol.2009 (8), p.1096-1102</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c845-1ce87507d196f7f2b2dbde7fbec3057d05456ba8fc380967bc8d63463e202f083</citedby><cites>FETCH-LOGICAL-c845-1ce87507d196f7f2b2dbde7fbec3057d05456ba8fc380967bc8d63463e202f083</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Zelenina, Ludmila N.</creatorcontrib><creatorcontrib>Chusova, Tamara P.</creatorcontrib><creatorcontrib>Matskevich, Nata I.</creatorcontrib><creatorcontrib>Naumov, Victor N.</creatorcontrib><creatorcontrib>Stenin, Yuri G.</creatorcontrib><creatorcontrib>Krabbes, Gernot</creatorcontrib><title>Thermodynamic Properties of Nd 1+ x Ba 2– x Cu 3 O y Compounds and Their Application for Optimizing the Synthesis of Superconducting Materials</title><title>European journal of inorganic chemistry</title><description>The standard enthalpies of formation from oxides of Nd
1+
x
Ba
2–
x
Cu
3
O
y
, where
x
= 0–0.8 and
y
= 6.65–7.24, were determined by using dissolution enthalpies of these compounds measured by solution calorimetry. The temperature dependence of the heat capacity of NdBa
2
Cu
3
O
6.87
wasmeasured over the range 5–320 K by adiabatic calorimetry. The absolute entropy,
S°
(
T
), the enthalpy of heating,
H°
(
T
K) –
H°
(0 K), and the reduced Gibbs energy,
Φ
°
(
T
) =
S°
(
T
) – [
H°
(
T
) –
H°
(
0
)]/
T
, were calculated by using the temperature dependence of
C
p
in the interval 0–320 K. The heat capacity and absolute entropy of NdBa
2
Cu
3
O
6.87
over the temperature range 320–1380 K were estimated by methods of quantum chemistry with use of the temperature dependence of
C
p
at low temperatures. A thermodynamic simulation was performed on the basis of the obtained data, and the conditions for synthesis of the NdBa
2
Cu
3
O
6.9
phase were determined.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)</description><issn>1434-1948</issn><issn>1099-0682</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2009</creationdate><recordtype>article</recordtype><recordid>eNo9kMtKw0AUhgdRUKtb12cvqWdmcpksa_AG1QrtPiRzsVOaTJgkYFz5DPocvoSP4pOYqrj6_sXhO_ARckZxShHZhd5YOWWIAjEJoz1yRDFNA4wF2x93yMOApqE4JMdtu0FEjjw-Im-rtfaVU0NdVFbCo3eN9p3VLTgDDwroOTzDZQHs6_V9XJ8fWQ8cFjBA5qrG9bVqoagVjBrrYdY0WyuLzroajPOwaDpb2RdbP0G31rAc6hGt_ZEv-_GTdLXqZbc7uC867W2xbU_IgRmhT_84Iavrq1V2G8wXN3fZbB5IEUYBlVokESaKprFJDCuZKpVOTKklxyhRGIVRXBbCSC4wjZNSChXzMOaaITMo-IRMf7XSu7b12uSNt1Xhh5xivgua74Lm_0H5NwUQbAQ</recordid><startdate>200903</startdate><enddate>200903</enddate><creator>Zelenina, Ludmila N.</creator><creator>Chusova, Tamara P.</creator><creator>Matskevich, Nata I.</creator><creator>Naumov, Victor N.</creator><creator>Stenin, Yuri G.</creator><creator>Krabbes, Gernot</creator><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>200903</creationdate><title>Thermodynamic Properties of Nd 1+ x Ba 2– x Cu 3 O y Compounds and Their Application for Optimizing the Synthesis of Superconducting Materials</title><author>Zelenina, Ludmila N. ; Chusova, Tamara P. ; Matskevich, Nata I. ; Naumov, Victor N. ; Stenin, Yuri G. ; Krabbes, Gernot</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c845-1ce87507d196f7f2b2dbde7fbec3057d05456ba8fc380967bc8d63463e202f083</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2009</creationdate><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zelenina, Ludmila N.</creatorcontrib><creatorcontrib>Chusova, Tamara P.</creatorcontrib><creatorcontrib>Matskevich, Nata I.</creatorcontrib><creatorcontrib>Naumov, Victor N.</creatorcontrib><creatorcontrib>Stenin, Yuri G.</creatorcontrib><creatorcontrib>Krabbes, Gernot</creatorcontrib><collection>CrossRef</collection><jtitle>European journal of inorganic chemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zelenina, Ludmila N.</au><au>Chusova, Tamara P.</au><au>Matskevich, Nata I.</au><au>Naumov, Victor N.</au><au>Stenin, Yuri G.</au><au>Krabbes, Gernot</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Thermodynamic Properties of Nd 1+ x Ba 2– x Cu 3 O y Compounds and Their Application for Optimizing the Synthesis of Superconducting Materials</atitle><jtitle>European journal of inorganic chemistry</jtitle><date>2009-03</date><risdate>2009</risdate><volume>2009</volume><issue>8</issue><spage>1096</spage><epage>1102</epage><pages>1096-1102</pages><issn>1434-1948</issn><eissn>1099-0682</eissn><abstract>The standard enthalpies of formation from oxides of Nd
1+
x
Ba
2–
x
Cu
3
O
y
, where
x
= 0–0.8 and
y
= 6.65–7.24, were determined by using dissolution enthalpies of these compounds measured by solution calorimetry. The temperature dependence of the heat capacity of NdBa
2
Cu
3
O
6.87
wasmeasured over the range 5–320 K by adiabatic calorimetry. The absolute entropy,
S°
(
T
), the enthalpy of heating,
H°
(
T
K) –
H°
(0 K), and the reduced Gibbs energy,
Φ
°
(
T
) =
S°
(
T
) – [
H°
(
T
) –
H°
(
0
)]/
T
, were calculated by using the temperature dependence of
C
p
in the interval 0–320 K. The heat capacity and absolute entropy of NdBa
2
Cu
3
O
6.87
over the temperature range 320–1380 K were estimated by methods of quantum chemistry with use of the temperature dependence of
C
p
at low temperatures. A thermodynamic simulation was performed on the basis of the obtained data, and the conditions for synthesis of the NdBa
2
Cu
3
O
6.9
phase were determined.(© Wiley‐VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2009)</abstract><doi>10.1002/ejic.200800745</doi><tpages>7</tpages></addata></record> |
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| ispartof | European journal of inorganic chemistry, 2009-03, Vol.2009 (8), p.1096-1102 |
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| language | eng |
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| source | Access via Wiley Online Library |
| title | Thermodynamic Properties of Nd 1+ x Ba 2– x Cu 3 O y Compounds and Their Application for Optimizing the Synthesis of Superconducting Materials |
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