Is there any interaction between graphite crucible and sintered oxides for obtaining ZnO-based varistors ?

With the intention to synthesize ZnO-based varistors I use sintering (under vacuum) of the following oxides (i.e., ZnO, Bi2O3, Sb2O3, MgO and Al2O3) within a temperature range from 1200 to 1400...

05 May 2016 3,187 4 View