Syntheses and electrical properties of tetragonal tungsten bronze type solid solution Ba{sub 6{minus}x}La{sub x}Nb{sub 10}O{sub 30+{delta}} (x = 0, 1, 2, 3) and Sr{sub 6}Nb{sub 10}O{sub 30}

Journal Article · Sat Nov 01 04:00:00 EST 1997 · Materials Research Bulletin

DOI:https://doi.org/10.1016/S0025-5408(97)00132-3· OSTI ID:561882

Hwang, Y K; Kwon, Y U ^[1]

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1. Sung Kyun Kwan Univ., Suwon (Korea, Republic of). Dept. of Chemistry

Tetragonal tungsten bronze (TBB) type niobium compounds Sr{sub 6}Nb{sub 10}O{sub 30} and a solid solution series Ba{sub 6{minus}x}La{sub x}Nb{sub 10}O{sub 30} (x = 0, 1, 2, 3) were synthesized and their resistivity was measured in the temperature range 10--300 K. The Sr compound is a semiconductor, the high temperature data (100 {le} T {le} 300 K) for which can be fitted to the T{sup {minus}1/4} law. Ba{sub 6}Nb{sub 10}O{sub 30} also is a semiconductor, but with a different temperature dependency. La-substitution in the Ba compound caused a conduction mechanism to change from semiconducting (x = 0) to metallic (x {ge} 1).

• Sponsoring Organization: USDOE
• OSTI ID: 561882
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Journal Issue: 11 Vol. 32; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
BARIUM OXIDES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
LANTHANUM OXIDES
NIOBIUM OXIDES
SOLID SOLUTIONS
STRONTIUM OXIDES
SYNTHESIS
TEMPERATURE DEPENDENCE