Affect of binder on mechanical and physical characterization of titanium dioxide based varistor

Abstract

Development of high performance titanium dioxide (Ti02) based varistor materials demands binders to improve its physical properties which will ultimately enhance its electrical performances. The material used for ceramic based varistor should exhibit good mechanical properties. As for desired mechanical properties, porosity should be minimal, high fued density, high sintered strength and small average grain size are desired. In this paper effect of PV A (binder) on Ti02 was investigated and its influence on physical, mechanical and microstructure was observed. The binder was added during ball milling and then followed by the shaping and sintering process. The samples were characterized by evaluating fued density, hardness, compressive strength and microstructure. Our studies revealed that varistor disc with higher density, hardness and strength can be produced with the use of binder.

Conventional Sintering Effects on the Microstructure and Electrical Characteristics of Low-Voltage Ceramic Varistor

“…The process will then proceed with remilling the mixed powder while adding binder for the purpose of increasing the mechanical strength of green ceramic body. Binder such as polyvinyl alcohol (PVA) are commonly added in a small quantity and mix together using mortar and pestle [20]. There is supposedly an ideal method suggested i.e.…”