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Heat capacity, thermal expansion and barocaloric effect in fluoride K2TaF7
The heat capacity and thermal expansion of potassium heptafluorotantalate were studied. The room temperature phase P 2 1 / c is stable at least to 4 K. The strong first-order phase transition P 2 1 / c - P n m a at T 0 = 486.2 K is accompanied by giant changes in the entropy, Δ S 0 = 22.3 J ( mol K...
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| Published in: | Journal of materials science 2019-12, Vol.54 (23), p.14287-14295 |
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| Main Authors: | , , , , |
| Format: | Article |
| Language: | English |
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| container_end_page | 14295 |
| container_issue | 23 |
| container_start_page | 14287 |
| container_title | Journal of materials science |
| container_volume | 54 |
| creator | Flerov, I. N. Gorev, M. V. Kartashev, A. V. Pogorel’tsev, E. I. Laptash, N. M. |
| description | The heat capacity and thermal expansion of potassium heptafluorotantalate were studied. The room temperature phase
P
2
1
/
c
is stable at least to 4 K. The strong first-order phase transition
P
2
1
/
c
-
P
n
m
a
at
T
0
=
486.2
K
is accompanied by giant changes in the entropy,
Δ
S
0
=
22.3
J
(
mol
K
)
-
1
,
and volume strain,
δ
V
0
/
V
=
-
3.6
%
. A rather high sensitivity of
K
2
TaF
7
to pressure was found,
d
T
0
/
d
p
=
-
220
K
G
Pa
-
1
. Significant extensive and intensive barocaloric effects are found at low pressure. The possibility of improving the barocaloric properties is discussed. |
| doi_str_mv | 10.1007/s10853-019-03924-8 |
| format | article |
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P
2
1
/
c
is stable at least to 4 K. The strong first-order phase transition
P
2
1
/
c
-
P
n
m
a
at
T
0
=
486.2
K
is accompanied by giant changes in the entropy,
Δ
S
0
=
22.3
J
(
mol
K
)
-
1
,
and volume strain,
δ
V
0
/
V
=
-
3.6
%
. A rather high sensitivity of
K
2
TaF
7
to pressure was found,
d
T
0
/
d
p
=
-
220
K
G
Pa
-
1
. Significant extensive and intensive barocaloric effects are found at low pressure. The possibility of improving the barocaloric properties is discussed.</description><identifier>ISSN: 0022-2461</identifier><identifier>EISSN: 1573-4803</identifier><identifier>DOI: 10.1007/s10853-019-03924-8</identifier><language>eng</language><publisher>New York: Springer US</publisher><subject>Ceramics ; Characterization and Evaluation of Materials ; Chemistry and Materials Science ; Classical Mechanics ; Crystallography and Scattering Methods ; Materials Science ; Polymer Sciences ; Solid Mechanics</subject><ispartof>Journal of materials science, 2019-12, Vol.54 (23), p.14287-14295</ispartof><rights>Springer Science+Business Media, LLC, part of Springer Nature 2019</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-s129t-b68587b4c899f4bbc02317c3478faed3f3113880a75d3feba8c229e616e97b1b3</cites><orcidid>0000-0001-5183-082X</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,776,780,27901,27902</link.rule.ids></links><search><creatorcontrib>Flerov, I. N.</creatorcontrib><creatorcontrib>Gorev, M. V.</creatorcontrib><creatorcontrib>Kartashev, A. V.</creatorcontrib><creatorcontrib>Pogorel’tsev, E. I.</creatorcontrib><creatorcontrib>Laptash, N. M.</creatorcontrib><title>Heat capacity, thermal expansion and barocaloric effect in fluoride K2TaF7</title><title>Journal of materials science</title><addtitle>J Mater Sci</addtitle><description>The heat capacity and thermal expansion of potassium heptafluorotantalate were studied. The room temperature phase
P
2
1
/
c
is stable at least to 4 K. The strong first-order phase transition
P
2
1
/
c
-
P
n
m
a
at
T
0
=
486.2
K
is accompanied by giant changes in the entropy,
Δ
S
0
=
22.3
J
(
mol
K
)
-
1
,
and volume strain,
δ
V
0
/
V
=
-
3.6
%
. A rather high sensitivity of
K
2
TaF
7
to pressure was found,
d
T
0
/
d
p
=
-
220
K
G
Pa
-
1
. Significant extensive and intensive barocaloric effects are found at low pressure. The possibility of improving the barocaloric properties is discussed.</description><subject>Ceramics</subject><subject>Characterization and Evaluation of Materials</subject><subject>Chemistry and Materials Science</subject><subject>Classical Mechanics</subject><subject>Crystallography and Scattering Methods</subject><subject>Materials Science</subject><subject>Polymer Sciences</subject><subject>Solid Mechanics</subject><issn>0022-2461</issn><issn>1573-4803</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid/><recordid>eNot0EFOwzAQBVALgUQpXICVD4Bhxk5ie4kqSoFKbMraGjs2pApJFKcS3J5AWY3-LP6XHmPXCLcIoO8ygimVALQClJWFMCdsgaVWojCgTtkCQEohiwrP2UXOewAotcQFe95EmniggUIzfd_w6SOOn9Ty-DVQl5u-49TV3NPYB2r7sQk8phTDxJuOp_Ywf-rIX-SO1vqSnSVqc7z6v0v2tn7YrTZi-_r4tLrfiozSTsJXpjTaF8FYmwrvA0iFOqhCm0SxVkkhKmOAdDmH6MkEKW2ssIpWe_RqydSxNw9j073H0e37w9jNkw7B_XK4I4ebOdwfhzPqB3w9Ur8</recordid><startdate>20191201</startdate><enddate>20191201</enddate><creator>Flerov, I. N.</creator><creator>Gorev, M. V.</creator><creator>Kartashev, A. V.</creator><creator>Pogorel’tsev, E. I.</creator><creator>Laptash, N. M.</creator><general>Springer US</general><scope/><orcidid>https://orcid.org/0000-0001-5183-082X</orcidid></search><sort><creationdate>20191201</creationdate><title>Heat capacity, thermal expansion and barocaloric effect in fluoride K2TaF7</title><author>Flerov, I. N. ; Gorev, M. V. ; Kartashev, A. V. ; Pogorel’tsev, E. I. ; Laptash, N. M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-s129t-b68587b4c899f4bbc02317c3478faed3f3113880a75d3feba8c229e616e97b1b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Ceramics</topic><topic>Characterization and Evaluation of Materials</topic><topic>Chemistry and Materials Science</topic><topic>Classical Mechanics</topic><topic>Crystallography and Scattering Methods</topic><topic>Materials Science</topic><topic>Polymer Sciences</topic><topic>Solid Mechanics</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Flerov, I. N.</creatorcontrib><creatorcontrib>Gorev, M. V.</creatorcontrib><creatorcontrib>Kartashev, A. V.</creatorcontrib><creatorcontrib>Pogorel’tsev, E. I.</creatorcontrib><creatorcontrib>Laptash, N. M.</creatorcontrib><jtitle>Journal of materials science</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Flerov, I. N.</au><au>Gorev, M. V.</au><au>Kartashev, A. V.</au><au>Pogorel’tsev, E. I.</au><au>Laptash, N. M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Heat capacity, thermal expansion and barocaloric effect in fluoride K2TaF7</atitle><jtitle>Journal of materials science</jtitle><stitle>J Mater Sci</stitle><date>2019-12-01</date><risdate>2019</risdate><volume>54</volume><issue>23</issue><spage>14287</spage><epage>14295</epage><pages>14287-14295</pages><issn>0022-2461</issn><eissn>1573-4803</eissn><abstract>The heat capacity and thermal expansion of potassium heptafluorotantalate were studied. The room temperature phase
P
2
1
/
c
is stable at least to 4 K. The strong first-order phase transition
P
2
1
/
c
-
P
n
m
a
at
T
0
=
486.2
K
is accompanied by giant changes in the entropy,
Δ
S
0
=
22.3
J
(
mol
K
)
-
1
,
and volume strain,
δ
V
0
/
V
=
-
3.6
%
. A rather high sensitivity of
K
2
TaF
7
to pressure was found,
d
T
0
/
d
p
=
-
220
K
G
Pa
-
1
. Significant extensive and intensive barocaloric effects are found at low pressure. The possibility of improving the barocaloric properties is discussed.</abstract><cop>New York</cop><pub>Springer US</pub><doi>10.1007/s10853-019-03924-8</doi><tpages>9</tpages><orcidid>https://orcid.org/0000-0001-5183-082X</orcidid><oa>free_for_read</oa></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 0022-2461 |
| ispartof | Journal of materials science, 2019-12, Vol.54 (23), p.14287-14295 |
| issn | 0022-2461 1573-4803 |
| language | eng |
| recordid | cdi_springer_journals_10_1007_s10853_019_03924_8 |
| source | Springer Nature |
| subjects | Ceramics Characterization and Evaluation of Materials Chemistry and Materials Science Classical Mechanics Crystallography and Scattering Methods Materials Science Polymer Sciences Solid Mechanics |
| title | Heat capacity, thermal expansion and barocaloric effect in fluoride K2TaF7 |
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