Zinc oxide element
AssigneeMeidensha Corporation
InventorsYuya Komatsu, Atsushi Seki, Masayuki Takada, Yukio Tagami
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Abstract
Provided is a zinc oxide element which does not contain antimony oxide and has good nonlinear resistance characteristics (V10 kA/V1 mA nonlinearity) by controlling the particle size of zinc oxide particles in a sintered body. The zinc oxide element of the present invention includes a fired body containing zinc oxide, bismuth oxide, and zinc stannate (Zn2SO4). A method for producing a zinc oxide element of the present invention includes firing a raw material oxide that contains zinc oxide, bismuth oxide, and tin oxide and does not contain antimony oxide, and segregating zinc stannate (Zn2SO4) at grain boundaries of the fired zinc oxide.
Claims8
A zinc oxide element comprising a fired body containing 90 to 99.4 mol % zinc oxide, 0.3 to 1 mol % bismuth oxide, and 0.1 to 5 mol % zinc stannate (Zn2SnO4), and
- in an arbitrary cross section of the fired body, a value obtained by dividing a standard deviation (σ) based on a distribution of cross-sectional areas of zinc oxide particles by an average particle diameter (D) of the zinc oxide particles (σ/D) is 0.4 or less, wherein the total amount of metal elements in the fired body is 100 mol %.
A method for producing a zinc oxide element, comprising firing a raw material oxide that contains 90 to 99.4 mol % zinc oxide, 0.3 to 1 mol % bismuth oxide, and 0.1 to 5 mol % tin oxide and does not contain antimony oxide, and segregating zinc stannate (Zn2SnO4) at grain boundaries of the fired zinc oxide during the firing, wherein the total amount of metal elements in the fired body is 100 mol % and wherein the firing is at a maximum holding temperature of 1000 to 1200° C., a holding time of 1 to 15 hours, a temperature raising rate of 10 to 70° C./hour, and a temperature lowering rate of 10 to 70° C./hour.
Dependencies are inferred from the claim text.