Advances in the synthesis of ZnO nanomaterials for varistor devices

Suresh C. Pillai*, John M. Kelly, Raghavendra Ramesh, Declan E. McCormack

*المؤلف المقابل لهذا العمل

نتاج البحث: المساهمة في مجلةمراجعة النظراء

127 اقتباسات (Scopus)

ملخص

ZnO based varistors are widely used for overvoltage protection in many electrical and electronic circuits, at voltages ranging from a few to over a million volts. By careful control of the microstructure, through nano-structuring by chemical routes, it should be possible to produce varistors with high breakdown voltage (Vc), as this is proportional to the number of active grain boundaries in the sintered body. This property is particularly important for the production of the small-sized varistors needed for modern electronic instruments such as tablet computers and mobile phones. The current review will outline the recent advances in the chemical processing (e.g. sol-gel, combustion synthesis plasma pyrolysis, micro-emulsion synthesis and precipitation routes) of varistors from ZnO nanomaterials and the properties of these materials. Uncontrolled grain growth at higher temperature is highlighted as a major challenge for obtaining desirable electrical properties for nano-varistors. Various novel sintering techniques such as step-sintering, spark plasma and microwave sintering methods are expected to deliver a varistor with controlled grain growth and optimum electrical characteristics.

اللغة الأصليةEnglish
الصفحات (من إلى)3268-3281
عدد الصفحات14
دوريةJournal of Materials Chemistry C
مستوى الصوت1
رقم الإصدار20
المعرِّفات الرقمية للأشياء
حالة النشرPublished - مايو 28 2013
منشور خارجيًانعم

ASJC Scopus subject areas

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