Antimony oxide substitute zinc oxide element

Patent metadata

Field	Value
Publication number	US-2025109073-A1
Application number	US-202318848084-A
Country	US
Kind code	A1
Filing date	Mar 8, 2023
Priority date	Mar 18, 2022
Publication date	Apr 3, 2025
Grant date	—

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.

First claim

1 .- 10 . (canceled)

11 . A zinc oxide element comprising a fired body containing zinc oxide, bismuth oxide, and zinc stannate (Zn 2 SnO 4 ), 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.

12 . The zinc oxide element according to claim 11 , wherein the amount of zinc stannate in the fired body is 0.1 to 5 mol % when the total amount of metal elements in the fired body is 100 mol %.

13 . (canceled)

14 . The zinc oxide element according to claim 11 , wherein the fired body further contains tin oxide.

15 . The zinc oxide element according to claim 11 , wherein the fired body does not contain antimony oxide.

16 . The zinc oxide element according to claim 11 , wherein the fired body further contains at least one oxide compound selected from the group consisting of cobalt oxide, nickel oxide, manganese oxide, chromium oxide, silver oxide, silicon oxide, and boron oxide.

17 . The zinc oxide element according to claim 11 , wherein the fired body further contains an oxide of at least one rare earth element selected from the group consisting of yttrium, europium, erbium, thulium, gadolinium, dysprosium, holmium, and ytterbium.

18 . A method for producing a zinc oxide element, comprising firing a raw material oxide that contains zinc oxide, bismuth oxide, and tin oxide and does not contain antimony oxide, and segregating zinc stannate (Zn 2 SnO 4 ) at grain boundaries of the fired zinc oxide.

19 . The production method according to claim 18 , wherein the raw material oxide further contains at least one oxide compound selected from the group consisting of cobalt oxide, nickel oxide, manganese oxide, chromium oxide, silver oxide, silicon oxide, and boron oxide.

20 . The production method according to claim 18 , wherein the raw material oxide further contains an oxide of at least one rare earth element selected from the group consisting of yttrium, europium, erbium, thulium, gadolinium, dysprosium, holmium, and ytterbium.

Assignees

• Meidensha Electric Mfg Co Ltd

Inventors

• Komatsu Yuya
• Seki Atsushi
• Takada Masayuki
• Tagami Yukio

Classifications

• B32B18/00

  Layered products essentially comprising ceramics, e.g. refractory products · CPC title

• C04B41/52

  Multiple coating or impregnating {multiple coating or impregnating with the same composition or with compositions only differing in the concentration of the constituents, is classified as single coating or impregnation} · CPC title

• C04B41/90

  at least one coating being a metal · CPC title

• C04B41/5022

  with vitreous materials (composition of vitreous glazes and enamels C03C; ceramic pigments C09C1/0009) · CPC title

• C04B41/009

  characterised by the material treated · CPC title