Preparation method of negative temperature coefficient bead thermistor

The invention discloses a preparation method of a negative temperature coefficient bead thermistor. A pentabasic oxide thermistor powder material is prepared by using cobaltic oxide, trimanganese tetroxide, nickel oxide, iron trioxide and magnesium oxide as raw materials through a ball-milling metho...

Full description

Saved in:
Bibliographic Details
Main Authors ZHAO NA, YANG YU, WU QIAN, ZHU YE, XU QING'AN, SHAO YIKAI, LIU YUDONG, SONG ZHIHUA, LYU ZHIQIANG, ZHUANG JIANWEN, MENG QINGHONG
Format Patent
LanguageChinese
English
Published 01.03.2019
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
Online AccessGet full text

Cover

More Information
Summary:The invention discloses a preparation method of a negative temperature coefficient bead thermistor. A pentabasic oxide thermistor powder material is prepared by using cobaltic oxide, trimanganese tetroxide, nickel oxide, iron trioxide and magnesium oxide as raw materials through a ball-milling method; a thermistor sizing agent is prepared by adopting an organic solvent; a glue dispenser is adoptedto carry out quantitative control on bead forming; after high-temperature sintering and welding of an outer lead, packaging is carried out by adopting an inorganic high-temperature adhesive and a test wire is welded so as to prepare the bead thermistor. The thermistor prepared by the preparation method is applicable to a high temperature; a material constant B25 DEG C/50DEG C is 3500K+/-5%; at atemperature of 0 DEG C, a resistance value is 45 kohm+/-10%; at a temperature of 900 DEG C, after high-temperature ageing is carried out for 200 h, a R0 DEG C resistance value change rate is smaller than +/-4%. The high-temper
Bibliography:Application Number: CN201811242010