Combined In3+ and Ga3+ donor doped ZnO varistor ceramic and preparation method thereof
A varistor ceramic and donor doping technology, applied in the direction of varistor, varistor core, etc., can solve the aging life of ZnO varistor, the decrease of pulse current tolerance performance index, can not meet the industrial application, ZnO Lattice distortion and other problems, to achieve the effect of enhancing aging life, suppressing the decline of nonlinear coefficient, and suppressing the growth of leakage current
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Embodiment 1
[0026] Embodiment 1: a kind of In 3+ , Ga 3+ The ZnO varistor ceramic prepared by compound donor doping includes a base material and a dopant, and the base material includes ZnO: 90.5 parts, Bi 2 o 3 : 3.0 parts, MnO 2 : 0.5 parts, Sb 2 o 3 : 2.5 parts, Co 2 o 3 : 1 part, Cr 2 o 3 : 0.5 parts, 2 parts of seed crystal dopant material, the mass fraction ratio of said seed crystal dopant material is ZnO: Ga(NO 3 ) 3 :In(NO 3 ) 3 =94:4:2.
Embodiment 2
[0027] Embodiment 2: a kind of In 3+ , Ga 3+ The ZnO varistor ceramic prepared by compound donor doping includes a base material and a dopant, and the base material includes ZnO: 87 parts, Bi 2 o 3 : 2.0 parts, MnO 2 : 0.4 parts, Sb 2 o 3 : 1.5 parts, Co 2 o 3 : 0.5 parts, Cr 2 o 3 : 0.2 part, seed dopant: 1 part; the seed dopant is ZnO, Ga 2 o 3 and In 2 o 3 , whose mass fraction ratio is ZnO:Ga 2 o 3 : In 2 o 3 =90:0.1:0.1.
Embodiment 3
[0028] Embodiment 3: a kind of In 3+ , Ga 3+ The ZnO varistor ceramic prepared by compound donor doping includes a base material and a dopant material, and the base material includes ZnO: 95 parts, Bi 2 o 3 : 4.0 parts, MnO 2 : 0.7 parts, Sb 2 o 3 : 3.5 parts, Co 2 o 3 : 1.5 parts, Cr 2 o 3 : 1.0 parts, seed dopant: 5 parts; the seed dopant is ZnO, Ga 2 o 3 and In 2 o 3 , whose mass fraction ratio is ZnO:Ga 2 o 3 : In 2 o 3 =95:5:5.
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