Influence of yttrium oxide addition on the characteristics of SnO2 based ceramics

Gaponov, A.V.

doi:10.1016/j.physb.2022.414010

Cited by 6 publications

(2 citation statements)

References 48 publications

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“…The details of the preparation are described in Ref. [13]. The sample baking was taking place at 1250°С during 1 h. In the process of electrode production, the In-Ga eutectic was applied.…”

Section: Methodsmentioning

confidence: 99%

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Electrical properties of tin oxide based varistors with PbO addition in humid air

Gaponov

Abramova

2023

physics

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In order to decrease the humidity sensitivity of SnO2–Co3O4–Nb2O5–Cr2O3 varistor ceramics, lead oxide was added and the electric characteristics of synthesized materials with the PbO concentration of 0, 0.1, 0.5, 0.7, 1 and 2 mol.% in the air with relative humidity of 10–86% were investigated. All tested samples have non-linear current–voltage characteristics with large values of the nonlinearity coefficient of 38–51. The optimal concentration of PbO addition in ceramics is 0.5–0.7 mol.%. The addition of such quantity of lead oxide to the ceramics leads to the decrease of the breakdown electric field up to 4390 V/cm and the humidity sensitivity coefficient up to 172. The increase of the PbO concentration provides the increase of the electrical conductivity of samples at low fields. The barrier mechanism of electrical conductivity of the studied ceramics is proved by the obtained values of potential barrier heights of 0.85–0.90 еV on the SnO2 crystallite boundaries.

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Section: Methodsmentioning

confidence: 99%

“…SnO 2 -Co 3 O 4 -Nb 2 O 5 -Cr 2 O 3 ceramics is one of the most investigated systems for varistor pro-duction [11][12][13]. It has great non-ohmic currentvoltage characteristics (CVC) with quite a large nonlinearity coefficient α ≈ 40-50 and at the same time great gas sensitive properties.…”

Section: Introductionmentioning

confidence: 99%