Low voltage varistor ceramics based on SnO2

Bulletin of materials science

O B Yang²  V Ravi¹  S R Dhage² 

[1] Physical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India$$Physical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, IndiaPhysical and Materials Chemistry Division, National Chemical Laboratory, Pune 411 008, India$$;School of Environmental and Chemical Engineering, Chonbuk National University, Jeonju 561-756, South Korea$$School of Environmental and Chemical Engineering, Chonbuk National University, Jeonju 561-756, South KoreaSchool of Environmental and Chemical Engineering, Chonbuk National University, Jeonju 561-756, South Korea$$

关键词: Tin oxide;    electronic materials;    chemical synthesis;    microstructure;    X-ray diffraction.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

The nonlinear current (𝐼)â€�?�voltage (ð‘�??) characteristics of tin dioxide doped with either Nb₂O₅ and CoO or Sb₂O₃ and CoO show promising values of nonlinear coefficient (ð›�?) values (∼11) with low breakdown voltages (𝐸_B, ∼40 V mm^-1). The pentavalent antimony or niobium acts as donor and increases the electronic conductivity. The crucial parameter for obtaining low breakdown voltage is the grain size, which depends upon sintering duration and temperature of these oxide ceramics.

【 授权许可】

Unknown