Nonlinear resistor ceramic composition, electronic component, and multilayer chip varistor
AssigneeTDK Corporation
InventorDai MATSUOKA
Life of this patent
Estimating the term…
Abstract
A nonlinear resistor ceramic composition has a major component containing zinc oxide, a first minor component containing an oxide of a rare-earth metal, a second minor component containing an oxide of Ca, and a third minor component containing an oxide of Si. A percentage of the second minor component to 100 moles of the major component is in the range of 2 atomic % ≦ the second minor component <80 atomic % in terms of Ca. A percentage of the third minor component to 100 moles of the major component is in the range of 1 atomic % ≦ the third minor component <40 atomic % in terms of Si. An atomic ratio of Ca to Si (Ca/Si) is not less than 1.
Claims13
A nonlinear resistor ceramic composition comprising:
- a major component containing zinc oxide;
- a first minor component containing an oxide of a rare-earth metal;
- a second minor component containing an oxide of Ca;
- and
- a third minor component containing an oxide of Si;
- wherein a percentage of the second minor component to 100 moles of the major component is in the range of 2 atomic % ≦ the second minor component <80 atomic % in terms of Ca;
- wherein a percentage of the third minor component to 100 moles of the major component is in the range of 1 atomic % ≦ the third minor component <40 atomic % in terms of Si;
- and
- wherein an atomic ratio of Ca to Si (Ca/Si) is not less than 1.
An electronic component comprising a nonlinear resistor layer,
- wherein the nonlinear resistor layer is comprised of a nonlinear resistor ceramic composition comprising:
- a major component containing zinc oxide;
- a first minor component containing an oxide of a rare-earth metal;
- a second minor component containing an oxide of Ca;
- and
- a third minor component containing an oxide of Si;
- wherein a percentage of the second minor component to 100 moles of the major component is in the range of 2 atomic % ≦ the second minor component <80 atomic % in terms of Ca;
- wherein a percentage of the third minor component to 100 moles of the major component is in the range of 1 atomic % ≦ the third minor component <40 atomic % in terms of Si;
- and
- wherein an atomic ratio of Ca to Si (Ca/Si) is not less than 1.
A multilayer chip varistor comprising a nonlinear resistor layer,
- wherein the nonlinear resistor layer is comprised of a nonlinear resistor ceramic composition comprising:
- a major component containing zinc oxide;
- a first minor component containing an oxide of a rare-earth metal;
- a second minor component containing an oxide of Ca;
- and
- a third minor component containing an oxide of Si;
- wherein a percentage of the second minor component to 100 moles of the major component is in the range of 2 atomic % ≦ the second minor component <80 atomic % in terms of Ca;
- wherein a percentage of the third minor component to 100 moles of the major component is in the range of 1 atomic % ≦ the third minor component <40 atomic % in terms of Si;
- and
- wherein an atomic ratio of Ca to Si (Ca/Si) is not less than 1.
Dependencies are inferred from the claim text.