Effects of Divalent Cation Substitution on Sinterability and Electrical Properties of LaCrO3 Ceramics
A series of LaCr1-xMxO3 (M = Mg, Cu, Zn, Ni) ceramics was fabricated by a conventional sintering process in air and Ar gas. Relative density, electrical conductivity, and magnetic susceptibility were measured to investigate the electrical conduction mechanism of the doped LaCrO3 ceramic. The apparen...
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| Veröffentlicht in: | Journal of solid state chemistry 1994-11, Vol.113 (1), p.138-144 |
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| creator | Jin, Fuxue Endo, Tadashi Takizawa, Hirotsugu Shimada, Masahiko |
| description | A series of LaCr1-xMxO3 (M = Mg, Cu, Zn, Ni) ceramics was fabricated by a conventional sintering process in air and Ar gas. Relative density, electrical conductivity, and magnetic susceptibility were measured to investigate the electrical conduction mechanism of the doped LaCrO3 ceramic. The apparent density was improved up to 95% of theoretical density, especially in the cases of M = Cu2+ and Zn2+. The electrical conductivity (σ) increased with increasing quantities of doped divalent cation (x), and log(σT) showed a linear relationship to (1/T). Magnetic data and chemical analysis indicated that the presence of Cr4+, rather than oxygen deficiencies, is preferential for the charge compensation. As a result, the electrical conduction was substantially governed by the hopping of small polarons between Cr3+ and Cr4+ ions. The substitution of Ni ions resulted in lower than expected unit cell volumes, somewhat different conductivities, and a different antiferromagnetic response, all of which pointed to the role of Ni3+ as of the source of an additional band conduction mechanism. |
| doi_str_mv | 10.1006/jssc.1994.1352 |
| format | Article |
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Relative density, electrical conductivity, and magnetic susceptibility were measured to investigate the electrical conduction mechanism of the doped LaCrO3 ceramic. The apparent density was improved up to 95% of theoretical density, especially in the cases of M = Cu2+ and Zn2+. The electrical conductivity (σ) increased with increasing quantities of doped divalent cation (x), and log(σT) showed a linear relationship to (1/T). Magnetic data and chemical analysis indicated that the presence of Cr4+, rather than oxygen deficiencies, is preferential for the charge compensation. As a result, the electrical conduction was substantially governed by the hopping of small polarons between Cr3+ and Cr4+ ions. The substitution of Ni ions resulted in lower than expected unit cell volumes, somewhat different conductivities, and a different antiferromagnetic response, all of which pointed to the role of Ni3+ as of the source of an additional band conduction mechanism.</description><identifier>ISSN: 0022-4596</identifier><identifier>EISSN: 1095-726X</identifier><identifier>DOI: 10.1006/jssc.1994.1352</identifier><identifier>CODEN: JSSCBI</identifier><language>eng</language><publisher>San Diego, CA: Elsevier Inc</publisher><subject>Antiferromagnetics ; Condensed matter: electronic structure, electrical, magnetic, and optical properties ; Conductivity phenomena in semiconductors and insulators ; Cross-disciplinary physics: materials science; rheology ; Electronic transport in condensed matter ; Exact sciences and technology ; Low-field transport and mobility; piezoresistance ; Magnetic properties and materials ; Materials science ; Materials synthesis; materials processing ; Physics ; Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation ; Studies of specific magnetic materials</subject><ispartof>Journal of solid state chemistry, 1994-11, Vol.113 (1), p.138-144</ispartof><rights>1994 Academic Press</rights><rights>1995 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c315t-630b89fca39420bb676f02b46edac07d9c66314c1dbdedd7a94f3b6cf955c5523</citedby></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0022459684713521$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3537,27901,27902,65306</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=3324616$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Jin, Fuxue</creatorcontrib><creatorcontrib>Endo, Tadashi</creatorcontrib><creatorcontrib>Takizawa, Hirotsugu</creatorcontrib><creatorcontrib>Shimada, Masahiko</creatorcontrib><title>Effects of Divalent Cation Substitution on Sinterability and Electrical Properties of LaCrO3 Ceramics</title><title>Journal of solid state chemistry</title><description>A series of LaCr1-xMxO3 (M = Mg, Cu, Zn, Ni) ceramics was fabricated by a conventional sintering process in air and Ar gas. Relative density, electrical conductivity, and magnetic susceptibility were measured to investigate the electrical conduction mechanism of the doped LaCrO3 ceramic. The apparent density was improved up to 95% of theoretical density, especially in the cases of M = Cu2+ and Zn2+. The electrical conductivity (σ) increased with increasing quantities of doped divalent cation (x), and log(σT) showed a linear relationship to (1/T). Magnetic data and chemical analysis indicated that the presence of Cr4+, rather than oxygen deficiencies, is preferential for the charge compensation. As a result, the electrical conduction was substantially governed by the hopping of small polarons between Cr3+ and Cr4+ ions. The substitution of Ni ions resulted in lower than expected unit cell volumes, somewhat different conductivities, and a different antiferromagnetic response, all of which pointed to the role of Ni3+ as of the source of an additional band conduction mechanism.</description><subject>Antiferromagnetics</subject><subject>Condensed matter: electronic structure, electrical, magnetic, and optical properties</subject><subject>Conductivity phenomena in semiconductors and insulators</subject><subject>Cross-disciplinary physics: materials science; rheology</subject><subject>Electronic transport in condensed matter</subject><subject>Exact sciences and technology</subject><subject>Low-field transport and mobility; piezoresistance</subject><subject>Magnetic properties and materials</subject><subject>Materials science</subject><subject>Materials synthesis; materials processing</subject><subject>Physics</subject><subject>Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation</subject><subject>Studies of specific magnetic materials</subject><issn>0022-4596</issn><issn>1095-726X</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1994</creationdate><recordtype>article</recordtype><recordid>eNp1kEtLAzEUhYMoWB9b11m4nTHvaZYy1gcUKqjgLuQJKdOZkqSF_ntnWnHn6nLgnHPv_QC4w6jGCImHdc62xlKyGlNOzsAMI8mrhojvczBDiJCKcSkuwVXOa4Qw5nM2A34RgrclwyHAp7jXne8LbHWJQw8_diaXWHZHMenYF5-0iV0sB6h7BxfdmE3R6g6-p2HrU4n-WLXUbVpR2I72TbT5BlwE3WV_-zuvwdfz4rN9rZarl7f2cVlZinmpBEVmLoPVVDKCjBGNCIgYJrzTFjVOWiEoZhY747xzjZYsUCNskJxbzgm9BvWp16Yh5-SD2qa40emgMFITJDVBUhMkNUEaA_enwFbn8YuQdG9j_ktRSpjAYrTNTzY_Hr-PPqlso--tdzGNBJQb4n8bfgDQWHyI</recordid><startdate>19941101</startdate><enddate>19941101</enddate><creator>Jin, Fuxue</creator><creator>Endo, Tadashi</creator><creator>Takizawa, Hirotsugu</creator><creator>Shimada, Masahiko</creator><general>Elsevier Inc</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope></search><sort><creationdate>19941101</creationdate><title>Effects of Divalent Cation Substitution on Sinterability and Electrical Properties of LaCrO3 Ceramics</title><author>Jin, Fuxue ; Endo, Tadashi ; Takizawa, Hirotsugu ; Shimada, Masahiko</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c315t-630b89fca39420bb676f02b46edac07d9c66314c1dbdedd7a94f3b6cf955c5523</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1994</creationdate><topic>Antiferromagnetics</topic><topic>Condensed matter: electronic structure, electrical, magnetic, and optical properties</topic><topic>Conductivity phenomena in semiconductors and insulators</topic><topic>Cross-disciplinary physics: materials science; rheology</topic><topic>Electronic transport in condensed matter</topic><topic>Exact sciences and technology</topic><topic>Low-field transport and mobility; piezoresistance</topic><topic>Magnetic properties and materials</topic><topic>Materials science</topic><topic>Materials synthesis; materials processing</topic><topic>Physics</topic><topic>Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation</topic><topic>Studies of specific magnetic materials</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Jin, Fuxue</creatorcontrib><creatorcontrib>Endo, Tadashi</creatorcontrib><creatorcontrib>Takizawa, Hirotsugu</creatorcontrib><creatorcontrib>Shimada, Masahiko</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><jtitle>Journal of solid state chemistry</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Jin, Fuxue</au><au>Endo, Tadashi</au><au>Takizawa, Hirotsugu</au><au>Shimada, Masahiko</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Effects of Divalent Cation Substitution on Sinterability and Electrical Properties of LaCrO3 Ceramics</atitle><jtitle>Journal of solid state chemistry</jtitle><date>1994-11-01</date><risdate>1994</risdate><volume>113</volume><issue>1</issue><spage>138</spage><epage>144</epage><pages>138-144</pages><issn>0022-4596</issn><eissn>1095-726X</eissn><coden>JSSCBI</coden><abstract>A series of LaCr1-xMxO3 (M = Mg, Cu, Zn, Ni) ceramics was fabricated by a conventional sintering process in air and Ar gas. Relative density, electrical conductivity, and magnetic susceptibility were measured to investigate the electrical conduction mechanism of the doped LaCrO3 ceramic. The apparent density was improved up to 95% of theoretical density, especially in the cases of M = Cu2+ and Zn2+. The electrical conductivity (σ) increased with increasing quantities of doped divalent cation (x), and log(σT) showed a linear relationship to (1/T). Magnetic data and chemical analysis indicated that the presence of Cr4+, rather than oxygen deficiencies, is preferential for the charge compensation. As a result, the electrical conduction was substantially governed by the hopping of small polarons between Cr3+ and Cr4+ ions. The substitution of Ni ions resulted in lower than expected unit cell volumes, somewhat different conductivities, and a different antiferromagnetic response, all of which pointed to the role of Ni3+ as of the source of an additional band conduction mechanism.</abstract><cop>San Diego, CA</cop><pub>Elsevier Inc</pub><doi>10.1006/jssc.1994.1352</doi><tpages>7</tpages></addata></record> |
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| subjects | Antiferromagnetics Condensed matter: electronic structure, electrical, magnetic, and optical properties Conductivity phenomena in semiconductors and insulators Cross-disciplinary physics: materials science rheology Electronic transport in condensed matter Exact sciences and technology Low-field transport and mobility piezoresistance Magnetic properties and materials Materials science Materials synthesis materials processing Physics Powder processing: powder metallurgy, compaction, sintering, mechanical alloying, and granulation Studies of specific magnetic materials |
| title | Effects of Divalent Cation Substitution on Sinterability and Electrical Properties of LaCrO3 Ceramics |
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