VOLTAGE NONLINEARITY RESISTOR COMPOSITION, AND VARISTOR AND LAMINATE VARISTOR THAT USE THE SAME

• Main Authors: KOGA HIDEKAZU, AZUMA YOSHIKO
• Format: Patent
• Language: English; Japanese
• Published: 12.08.2016
• Subjects: ARTIFICIAL STONE; BASIC ELECTRIC ELEMENTS; CEMENTS; CERAMICS; CHEMISTRY; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS; CONCRETE; ELECTRICITY; LIME, MAGNESIA; METALLURGY; REFRACTORIES; RESISTORS; SLAG; TREATMENT OF NATURAL STONE

PROBLEM TO BE SOLVED: To provide a voltage nonlinearity resistor composition that develops excellent voltage nonlinearity even when an unbaked varistor material and a less noble electrode having low resistance are burned integrally with each other, and enables dense sintering.SOLUTION: A voltage nonlinearity resistor composition contains Zn element, Co element, Ta element and first Sr element, and at least one kind of element or element group selected from the group consisting of second Sr element, Ca element and Ba element. The first Sr element is coupled to the Co element. When the element or element group selected from the group consisting of the second Sr element, the Ca element and the Ba element is represented by A, and with respect to the mole ratios of the Zn element, the Co element, the first Sr element, the Ta element and A, the mole ratio of the Zn element is represented by (1-x), the mole ratios of the Co element and the first Sr element are represented by x, the mole ratio of the element of A is represented by y and the mole ratio of Ta is represented by Z, x, y and z are in a range satisfying 0.0025≤x≤0.05, 0.002≤y≤0.05 and 0≤z≤0.003.SELECTED DRAWING: Figure 1 【課題】未焼成のバリスタ材料と低抵抗の卑金属電極とを一体焼成しても、優れた電圧非直線性を発現し、緻密焼結化が可能な電圧非直線性抵抗体組成物を提供する。【解決手段】Ｚｎ元素、Ｃｏ元素、Ｔａ元素および第１のＳｒ元素と、第２のＳｒ元素、Ｃａ元素、Ｂａ元素の少なくとも一種から選ばれる元素もしくは元素群とを含み、第１のＳｒ元素はＣｏ元素と結合し、第２のＳｒ元素、Ｃａ元素、Ｂａ元素の少なくとも一種から選ばれる元素もしくは元素群をＡとしたときＺｎ元素、Ｃｏ元素、第１のＳｒ元素、Ｔａ元素およびＡのモル比において、Ｚｎ元素のモル比を（１−ｘ）、Ｃｏ元素と第１のＳｒ元素のモル比をそれぞれｘ、Ａの元素のモル比をｙ、Ｔａモル比をｚとしたときｘ、ｙおよびｚは、０．００２５≦ｘ≦０．０５、０．００２≦ｙ≦０．０５および０≦ｚ≦０．００３の範囲を満たす電圧非直線性抵抗体組成物。【選択図】図１