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Lead-series low-resistivity heat-sensitive resistor and manufacturing method thereof

A thermistor and low resistivity technology, applied in the direction of resistors with positive temperature coefficient, etc., can solve the problems of high lift-to-drag ratio, low room temperature resistivity, etc., to reduce firing temperature, increase industrial application value, reduce The effect of production costs

Inactive Publication Date: 2013-07-31
HUBEI ZHANPENG NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To solve the technical problem that the existing lead-based thermistors are difficult to have both low room temperature resistivity and high lift-to-drag ratio

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Embodiment 1: get 0.896molBaCO 3 , 1.015molTiO 2 , 0.137molPbO, 0.08molCaCO 3 , 0.002molY 2 o 3 , 0.016molSiO 2 , 0.0008molMn (NO 3 ) 2 Put it into a ball mill, add an appropriate amount of water and mill it for 24 hours, then dry it, pre-fire it in a high-temperature furnace, and keep it at 1080°C for 3 hours to obtain clinker; put the clinker into the ball mill, and add 1.2*10 -4 mol K 2 CO 3 , and then add an appropriate amount of water to carry out secondary ball milling. After 24 hours of ball milling, spray granulation, after drying, press into tablets under a pressure of 250MPa; place the pressed blanks on a setter and place them in a high-temperature furnace In the process, sinter at a high temperature of 1260°C and keep it warm for 30 minutes to obtain ceramic pieces; after the temperature of the ceramic pieces drops to room temperature, the surface treatment of the ceramic pieces is carried out, after the treatment is clean, the electrodes are printed,...

Embodiment 2

[0017] Embodiment 2: get 0.711mol BaCO 3 , 1.005molTiO 2 , 0.124molPbO, 0.165molCaCO 3 , 0.002molY 2 o 3 , 0.016molSiO 2 , 0.0004molMn (NO 3 ) 2 Put it into the ball milling equipment, add an appropriate amount of water and ball mill it for 24 hours, then dry it, pre-fire it in a high-temperature furnace, and keep it at 1125°C for 4 hours to obtain clinker; put the clinker into the ball milling equipment, and add 7.6*10 -4 mol K 2 CO 3 , and then add an appropriate amount of water to carry out secondary ball milling. After 24 hours of ball milling, spray granulation, after drying, press into tablets under a pressure of 250MPa; place the pressed blanks on a setter and place them in a high-temperature furnace In the process, sinter at a high temperature of 1320°C and keep it warm for 70 minutes to obtain ceramic pieces; after the temperature of the ceramic pieces drops to room temperature, the surface treatment of the ceramic pieces is carried out, after the treatment is...

Embodiment 3

[0018] Embodiment 3: get 0.783molBaCO 3 , 1.012molTiO 2 , 0.024molPbO, 0.10molCaCO 3 , 0.002molY 2 o 3 , 0.02mol SiO 2 , 0.00065molMn (NO 3 ) 2 Put it into a ball mill, add an appropriate amount of water and ball mill it for 24 hours, then dry it, pre-fire it in a high-temperature furnace, and keep it at 1100°C for 3.5 hours to obtain clinker; put the clinker into the ball mill, and add K at the same time 2 CO 3 3.8*10 -4 mol, and then add an appropriate amount of water to carry out secondary ball milling, spray granulation after ball milling for 24 hours, and press it into tablets under a pressure of 250MPa; place the pressed green sheet on the setter, place it in a high-temperature furnace, and Sinter at a high temperature of 1300°C and hold for 50 minutes to obtain ceramic pieces; after the temperature of the ceramic pieces drops to room temperature, the surface treatment of the ceramic pieces is carried out, after the treatment is cleaned, electrodes are printed on...

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Abstract

The invention discloses a lead-series low-resistivity heat-sensitive resistor, which is manufactured by sintering powder by an electrode manufacturing process. The resistor is characterized in that: the powder consists of the following components in molar ratio: 0.711 to 0.896 mol of BaCO3, 1.005 to 1.015 mol of TiO2, 0.024 to 0.137 mol of PbO, 0.08 to 0.165 mol of CaCO3, 0.002 to 0.003 mol of Y2O3, 0.016 to 0.024 mol of SiO2, 1.2*10<-4> to 7.6*10<-4> mol of K2CO3 and 0.0004 to 0.0008 mol of Mn(NO3)2. TiO2 is taken as a structure forming agent, Mn(NO3)2 is taken as a liquid phase agent, Y2O3 is taken as a semi-conducting reagent as well as a grain refining agent, SiO2 is taken as a vitrification reagent, and K2CO3 is doped into a presintered clinker, so that the microscopic structure of the heat-sensitive resistor is improved remarkably, the reliability of the heat-sensitive resistor is enhanced and the industrial application value of the lead-series heat-sensitive resistor is raised greatly.

Description

technical field [0001] The invention relates to a thermistor, in particular to a lead-based low-resistivity thermistor and a preparation method thereof. Background technique [0002] The ceramic thermistor has the following characteristics: 1. When the temperature is lower than the Curie point, it has semiconductor characteristics, and when the temperature is higher than the Curie point, the resistance value increases stepwise with the increase of temperature; 2. It has power-on Instantaneous Division produces a strong current and then decays quickly. Taking advantage of this feature, people use ceramic thermistors as electronic components, which have the functions of overcurrent and overheat protection, avoid damage to electrical equipment, and have the advantages of simple structure and reliability. With the continuous expansion of the application range of ceramic thermistors, many occasions require ceramic thermistors to have low room temperature resistivity, large switc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01C7/02
Inventor 刘洪祥
Owner HUBEI ZHANPENG NEW MATERIAL CO LTD