Enthalpy measurements on rare earth hafnates RE2O3·2HfO2 (s) (RE = Sm, Eu, Dy)
Compounds of the general formula RE 2 O 3 ·2HfO 2 with RE = Sm, Eu, Gd, Dy, etc., are considered potential candidate materials for use in the control rods of future nuclear reactors. Sm 2 O 3 ·2HfO 2 , Eu 2 O 3 ·2HfO 2 , and Dy 2 O 3 ·2HfO 2 were prepared by solid-state route and characterized by XR...
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| Veröffentlicht in: | Journal of thermal analysis and calorimetry 2018, Vol.131 (3), p.2687-2692 |
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| creator | Kandan, R. Prabhakara Reddy, B. Panneerselvam, G. Mudali, U. Kamachi |
| description | Compounds of the general formula RE
2
O
3
·2HfO
2
with RE = Sm, Eu, Gd, Dy, etc., are considered potential candidate materials for use in the control rods of future nuclear reactors. Sm
2
O
3
·2HfO
2
, Eu
2
O
3
·2HfO
2
, and Dy
2
O
3
·2HfO
2
were prepared by solid-state route and characterized by XRD technique. Enthalpy increment measurements have been carried out on these compounds in the temperature range 730–1679 K by inverse drop method by using a high-temperature differential calorimeter. From the enthalpy values, other thermodynamic functions, namely heat capacity, entropy, and Gibbs energy functions, were computed. The polynomial expressions of enthalpy increments obtained for rare earth hafnate in the temperature range 298–1700 K is given as:
H
T
0
-
H
298
0
/
J mol
-
1
=
259.890
T
+
21.610
×
10
-
3
T
2
+
32.389
×
10
5
T
-
1
-
90
,
271
-
-
Sm
2
O
3
·
2
HfO
2
H
T
0
-
H
298
0
/
J
mol
-
1
=
261.134
T
+
22.273
×
10
-
3
T
2
+
25.988
×
10
5
T
-
1
-
88
,
553
-
-
Eu
2
O
3
·
2
HfO
2
H
T
0
-
H
298
0
/
J
mol
-
1
=
255.016
T
+
18.030
×
10
-
3
T
2
+
29.332
×
10
5
T
-
1
-
87
,
474
-
-
Dy
2
O
3
·
2
HfO
2 |
| doi_str_mv | 10.1007/s10973-017-6802-6 |
| format | Article |
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2
O
3
·2HfO
2
with RE = Sm, Eu, Gd, Dy, etc., are considered potential candidate materials for use in the control rods of future nuclear reactors. Sm
2
O
3
·2HfO
2
, Eu
2
O
3
·2HfO
2
, and Dy
2
O
3
·2HfO
2
were prepared by solid-state route and characterized by XRD technique. Enthalpy increment measurements have been carried out on these compounds in the temperature range 730–1679 K by inverse drop method by using a high-temperature differential calorimeter. From the enthalpy values, other thermodynamic functions, namely heat capacity, entropy, and Gibbs energy functions, were computed. The polynomial expressions of enthalpy increments obtained for rare earth hafnate in the temperature range 298–1700 K is given as:
H
T
0
-
H
298
0
/
J mol
-
1
=
259.890
T
+
21.610
×
10
-
3
T
2
+
32.389
×
10
5
T
-
1
-
90
,
271
-
-
Sm
2
O
3
·
2
HfO
2
H
T
0
-
H
298
0
/
J
mol
-
1
=
261.134
T
+
22.273
×
10
-
3
T
2
+
25.988
×
10
5
T
-
1
-
88
,
553
-
-
Eu
2
O
3
·
2
HfO
2
H
T
0
-
H
298
0
/
J
mol
-
1
=
255.016
T
+
18.030
×
10
-
3
T
2
+
29.332
×
10
5
T
-
1
-
87
,
474
-
-
Dy
2
O
3
·
2
HfO
2</description><identifier>ISSN: 1388-6150</identifier><identifier>EISSN: 1588-2926</identifier><identifier>DOI: 10.1007/s10973-017-6802-6</identifier><language>eng</language><publisher>Dordrecht: Springer Netherlands</publisher><subject>Analytical Chemistry ; Chemistry ; Chemistry and Materials Science ; Control rods ; Dysprosium ; Enthalpy ; Europium compounds ; Gadolinium ; Inorganic Chemistry ; Materials selection ; Mathematical analysis ; Measurement Science and Instrumentation ; Nuclear energy ; Nuclear reactors ; Physical Chemistry ; Polymer Sciences ; Rare earth elements ; Rare earth oxides ; Specific heat</subject><ispartof>Journal of thermal analysis and calorimetry, 2018, Vol.131 (3), p.2687-2692</ispartof><rights>Akadémiai Kiadó, Budapest, Hungary 2017</rights><rights>Copyright Springer Science & Business Media 2018</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c2686-d9005c5adb2fc436c8780b21fc5e5c34c7c1e600a2b9b62d18783d5db1d7633a3</citedby><cites>FETCH-LOGICAL-c2686-d9005c5adb2fc436c8780b21fc5e5c34c7c1e600a2b9b62d18783d5db1d7633a3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://link.springer.com/content/pdf/10.1007/s10973-017-6802-6$$EPDF$$P50$$Gspringer$$H</linktopdf><linktohtml>$$Uhttps://link.springer.com/10.1007/s10973-017-6802-6$$EHTML$$P50$$Gspringer$$H</linktohtml><link.rule.ids>315,781,785,27926,27927,41490,42559,51321</link.rule.ids></links><search><creatorcontrib>Kandan, R.</creatorcontrib><creatorcontrib>Prabhakara Reddy, B.</creatorcontrib><creatorcontrib>Panneerselvam, G.</creatorcontrib><creatorcontrib>Mudali, U. Kamachi</creatorcontrib><title>Enthalpy measurements on rare earth hafnates RE2O3·2HfO2 (s) (RE = Sm, Eu, Dy)</title><title>Journal of thermal analysis and calorimetry</title><addtitle>J Therm Anal Calorim</addtitle><description>Compounds of the general formula RE
2
O
3
·2HfO
2
with RE = Sm, Eu, Gd, Dy, etc., are considered potential candidate materials for use in the control rods of future nuclear reactors. Sm
2
O
3
·2HfO
2
, Eu
2
O
3
·2HfO
2
, and Dy
2
O
3
·2HfO
2
were prepared by solid-state route and characterized by XRD technique. Enthalpy increment measurements have been carried out on these compounds in the temperature range 730–1679 K by inverse drop method by using a high-temperature differential calorimeter. From the enthalpy values, other thermodynamic functions, namely heat capacity, entropy, and Gibbs energy functions, were computed. The polynomial expressions of enthalpy increments obtained for rare earth hafnate in the temperature range 298–1700 K is given as:
H
T
0
-
H
298
0
/
J mol
-
1
=
259.890
T
+
21.610
×
10
-
3
T
2
+
32.389
×
10
5
T
-
1
-
90
,
271
-
-
Sm
2
O
3
·
2
HfO
2
H
T
0
-
H
298
0
/
J
mol
-
1
=
261.134
T
+
22.273
×
10
-
3
T
2
+
25.988
×
10
5
T
-
1
-
88
,
553
-
-
Eu
2
O
3
·
2
HfO
2
H
T
0
-
H
298
0
/
J
mol
-
1
=
255.016
T
+
18.030
×
10
-
3
T
2
+
29.332
×
10
5
T
-
1
-
87
,
474
-
-
Dy
2
O
3
·
2
HfO
2</description><subject>Analytical Chemistry</subject><subject>Chemistry</subject><subject>Chemistry and Materials Science</subject><subject>Control rods</subject><subject>Dysprosium</subject><subject>Enthalpy</subject><subject>Europium compounds</subject><subject>Gadolinium</subject><subject>Inorganic Chemistry</subject><subject>Materials selection</subject><subject>Mathematical analysis</subject><subject>Measurement Science and Instrumentation</subject><subject>Nuclear energy</subject><subject>Nuclear reactors</subject><subject>Physical Chemistry</subject><subject>Polymer Sciences</subject><subject>Rare earth elements</subject><subject>Rare earth oxides</subject><subject>Specific heat</subject><issn>1388-6150</issn><issn>1588-2926</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNp1kM1Kw0AUhQdRsFYfwN2AmxYavXOnmSQLF9JGKxSKVdfDZDKxliapM8mib9O3cN8nc0oEV67ugXt-4CPkmsEtA4juHIMk4gGwKBAxYCBOSI-FcRxgguLUa-61YCGckwvn1gCQJMB65CWtmpXabHe0NMq11pSmahytK2qVNdQo26zoShWVaoyjyxQX_PCNs2KBdOCGdLBMD_v7w_61HNG0HdHpbnhJzgq1cebq9_bJ-2P6NpkF88XT8-RhHmgUsQjyBCDUocozLPSYCx1HMWTICh2aUPOxjjQzAkBhlmQCc-b_PA_zjOWR4FzxPrnpere2_mqNa-S6bm3lJyV6ImOBCNy7WOfStnbOmkJu7Wep7E4ykEdysiMnPTl5JCeFz2CXcd5bfRj71_x_6Af1TW8s</recordid><startdate>2018</startdate><enddate>2018</enddate><creator>Kandan, R.</creator><creator>Prabhakara Reddy, B.</creator><creator>Panneerselvam, G.</creator><creator>Mudali, U. Kamachi</creator><general>Springer Netherlands</general><general>Springer Nature B.V</general><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>2018</creationdate><title>Enthalpy measurements on rare earth hafnates RE2O3·2HfO2 (s) (RE = Sm, Eu, Dy)</title><author>Kandan, R. ; Prabhakara Reddy, B. ; Panneerselvam, G. ; Mudali, U. Kamachi</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c2686-d9005c5adb2fc436c8780b21fc5e5c34c7c1e600a2b9b62d18783d5db1d7633a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Analytical Chemistry</topic><topic>Chemistry</topic><topic>Chemistry and Materials Science</topic><topic>Control rods</topic><topic>Dysprosium</topic><topic>Enthalpy</topic><topic>Europium compounds</topic><topic>Gadolinium</topic><topic>Inorganic Chemistry</topic><topic>Materials selection</topic><topic>Mathematical analysis</topic><topic>Measurement Science and Instrumentation</topic><topic>Nuclear energy</topic><topic>Nuclear reactors</topic><topic>Physical Chemistry</topic><topic>Polymer Sciences</topic><topic>Rare earth elements</topic><topic>Rare earth oxides</topic><topic>Specific heat</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kandan, R.</creatorcontrib><creatorcontrib>Prabhakara Reddy, B.</creatorcontrib><creatorcontrib>Panneerselvam, G.</creatorcontrib><creatorcontrib>Mudali, U. Kamachi</creatorcontrib><collection>CrossRef</collection><jtitle>Journal of thermal analysis and calorimetry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kandan, R.</au><au>Prabhakara Reddy, B.</au><au>Panneerselvam, G.</au><au>Mudali, U. Kamachi</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Enthalpy measurements on rare earth hafnates RE2O3·2HfO2 (s) (RE = Sm, Eu, Dy)</atitle><jtitle>Journal of thermal analysis and calorimetry</jtitle><stitle>J Therm Anal Calorim</stitle><date>2018</date><risdate>2018</risdate><volume>131</volume><issue>3</issue><spage>2687</spage><epage>2692</epage><pages>2687-2692</pages><issn>1388-6150</issn><eissn>1588-2926</eissn><abstract>Compounds of the general formula RE
2
O
3
·2HfO
2
with RE = Sm, Eu, Gd, Dy, etc., are considered potential candidate materials for use in the control rods of future nuclear reactors. Sm
2
O
3
·2HfO
2
, Eu
2
O
3
·2HfO
2
, and Dy
2
O
3
·2HfO
2
were prepared by solid-state route and characterized by XRD technique. Enthalpy increment measurements have been carried out on these compounds in the temperature range 730–1679 K by inverse drop method by using a high-temperature differential calorimeter. From the enthalpy values, other thermodynamic functions, namely heat capacity, entropy, and Gibbs energy functions, were computed. The polynomial expressions of enthalpy increments obtained for rare earth hafnate in the temperature range 298–1700 K is given as:
H
T
0
-
H
298
0
/
J mol
-
1
=
259.890
T
+
21.610
×
10
-
3
T
2
+
32.389
×
10
5
T
-
1
-
90
,
271
-
-
Sm
2
O
3
·
2
HfO
2
H
T
0
-
H
298
0
/
J
mol
-
1
=
261.134
T
+
22.273
×
10
-
3
T
2
+
25.988
×
10
5
T
-
1
-
88
,
553
-
-
Eu
2
O
3
·
2
HfO
2
H
T
0
-
H
298
0
/
J
mol
-
1
=
255.016
T
+
18.030
×
10
-
3
T
2
+
29.332
×
10
5
T
-
1
-
87
,
474
-
-
Dy
2
O
3
·
2
HfO
2</abstract><cop>Dordrecht</cop><pub>Springer Netherlands</pub><doi>10.1007/s10973-017-6802-6</doi><tpages>6</tpages></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1388-6150 |
| ispartof | Journal of thermal analysis and calorimetry, 2018, Vol.131 (3), p.2687-2692 |
| issn | 1388-6150 1588-2926 |
| language | eng |
| recordid | cdi_proquest_journals_2007462203 |
| source | SpringerNature Journals |
| subjects | Analytical Chemistry Chemistry Chemistry and Materials Science Control rods Dysprosium Enthalpy Europium compounds Gadolinium Inorganic Chemistry Materials selection Mathematical analysis Measurement Science and Instrumentation Nuclear energy Nuclear reactors Physical Chemistry Polymer Sciences Rare earth elements Rare earth oxides Specific heat |
| title | Enthalpy measurements on rare earth hafnates RE2O3·2HfO2 (s) (RE = Sm, Eu, Dy) |
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