Optimization of the composition and sintering conditions of high-voltage ZnO varistor ceramics


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This paper presents a study aimed at optimizing the composition and sintering conditions of highvoltage ZnO varistor ceramics. We demonstrate that, with allowance for the cost of starting materials, the optimal composition of high-voltage ZnO varistor ceramics is as follows (wt %): ZnO, 90; Bi2O3, 2.76; Sb2O3, 1.92; Al2O3, 3.32; and Co2O3, 2. The optimal sintering conditions are isothermal holding at a temperature of 975°C for 2 h. The ceramics thus prepared have Vb = 4.5 kV/mm, α = 50, Il = 1.1 μA/cm2, density ρ = 5.67 g/cm3 (relative density of 96.1%).

作者简介

O. Gromov

Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center

Email: tikhomirova@chemy.kolasc.net.ru
俄罗斯联邦, Akademgorodok 26a, Apatity, Murmansk oblast, 184209

Yu. Savel’ev

Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center

Email: tikhomirova@chemy.kolasc.net.ru
俄罗斯联邦, Akademgorodok 26a, Apatity, Murmansk oblast, 184209

E. Tikhomirova

Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center

编辑信件的主要联系方式.
Email: tikhomirova@chemy.kolasc.net.ru
俄罗斯联邦, Akademgorodok 26a, Apatity, Murmansk oblast, 184209

A. Belyaevskii

Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center

Email: tikhomirova@chemy.kolasc.net.ru
俄罗斯联邦, Akademgorodok 26a, Apatity, Murmansk oblast, 184209

E. Lokshin

Tananaev Institute of Chemistry and Technology of Rare Elements and Mineral Raw Materials, Kola Scientific Center

Email: tikhomirova@chemy.kolasc.net.ru
俄罗斯联邦, Akademgorodok 26a, Apatity, Murmansk oblast, 184209

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