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Composite positive temperature coefficient thermistor material and preparation method thereof

A positive temperature coefficient, thermistor technology, applied in the direction of resistors with positive temperature coefficients, resistance manufacturing, resistors, etc., can solve the problems of high room temperature resistivity, not being able to reach a large number of applications, complex process conditions, etc., to achieve The effect of lower room temperature resistivity and high lift-to-drag ratio

Pending Publication Date: 2022-06-28
TIANJIN RUIKEN NEW MATERIAL TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This new type of thermal resister (PTC) made from materials called barium titanate or lead zirconium oxide can have improved resistance at low temperatures compared to traditional PTCs due to its lower specific gravity.

Problems solved by technology

The technical problem addressed for current methods that reduce resistance at room temperatures while also improving their ability to withstand higher voltages is how to improve negative temperature coefficients (NTC), particularly when incorporated into electronic devices such as home electric fax machines and automobile air conditioners.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] will be 0.894BaC0 3 , 0.10SrCO 3 , 0.002Pb 3 O 4 , 1.0070TiO 2 , 0.0004Sb 2 O 3 , 0.0011Nb 2 O 5 The batching is carried out according to the molar ratio. The batching uses deionized water and alumina balls (diameter 5-20mm) as ball milling media, according to the mass ratio of material: deionized water: alumina balls = 1:2:4, in the polyurethane lining Wet grinding in a ball mill for 6 hours, the ball abrasives are dried in a drying equipment at 115°C, and then placed in an alumina crucible, placed in an electric furnace, and pre-synthesized under the condition of 1030°C for 3 hours to obtain a pre-synthetic material; Then 0.0003MnO 2 , 0.0004Al 2 O 3 , 0.0010SiO 2 It is mixed into the pre-synthetic material according to the molar ratio, and deionized water and alumina balls (diameter 5-20mm) are used as ball milling media. The ball mill was mixed evenly for 8 hours, the ball abrasive was dried in the drying equipment at 115 °C, and the dried material was p...

Embodiment 2

[0055] Put 0.9400BaC0 3 , 0.0200Pb 3 O 4 , 1.0100TiO 2 , 0.0003Sb 2 O 3 , 0.0011Nb 2 O 5 The batching is carried out according to the molar ratio. The batching uses deionized water and zirconia balls (diameter 5-20mm) as the ball milling medium. Wet grinding in a lined ball mill for 8 hours, the ball abrasives were dried in an oven at 120°C, and then placed in an alumina crucible, placed in an electric furnace, and pre-synthesized at 1050°C for 4 hours to obtain a pre-synthesized material; Then 0.0004MnO 2 , 0.0003Al 2 O 3 , 0.0011SiO 2 Mixed into the pre-synthetic material according to the molar ratio, using deionized water and zirconia balls (diameter 5-20mm) as the ball milling medium, according to the mass ratio of material: deionized water: zirconia ball = 1.5:3:4.5, and then carry The ball mill was mixed evenly for 8 hours, and the ball abrasive was dried in an oven at 120°C and passed through a 40-mesh sieve to prepare a mixture for later use. 6 wt % PVA aqu...

Embodiment 3

[0059] Put 0.9200BaC0 3 , 0.0800SrCO 3 , 1.0105TiO 2 , 0.0004Sb 2 O 3 , 0.0010Nb 2 O 5 The ingredients are prepared in a molar ratio, using deionized water and agate balls (diameter 5-20mm) as ball milling media, according to the mass ratio of materials: deionized water: agate balls = 1:2.5:4, in a ball mill lined with polyurethane After wet grinding for 6 hours, the ball abrasives were dried in an oven at 120°C, then placed in an alumina crucible, placed in an electric furnace, and kept at 1060°C for 3 hours for pre-synthesis to make pre-synthesized materials; then 0.0004MnO 2 , 0.0003Al 2 O 3 , 0.0010SiO 2 It is mixed into the pre-synthetic material according to the molar ratio, and deionized water and agate balls (diameter 5-20mm) are used as ball milling media. Mix evenly, dry the ball abrasive in the drying equipment at 120°C, and pass the dried material through a 40-mesh sieve to prepare a mixture for later use. 6 wt % PVA aqueous solution was added to the abov...

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Abstract

The invention relates to a positive temperature coefficient thermistor composite material and a preparation method thereof. Immersing the prepared BaTiO3-based positive temperature coefficient thermistor porous ceramic chip into a mixed solution of hydrochloric acid, aniline and ammonium persulfate, stirring for 2-12 hours, after stirring is completed, taking out the porous ceramic chip immersed into the mixed solution, standing for 2-20 hours, washing with deionized water, drying, and grinding off a polyaniline film on the surface to obtain the BaTiO3-based positive temperature coefficient thermistor porous ceramic chip. The positive temperature coefficient thermistor composite material sheet is prepared. Ohmic contact electrodes are prepared on upper and lower parallel planes of the positive temperature coefficient thermistor composite material sheet for resistance and resistance temperature characteristic testing. The room temperature resistivity of the positive temperature coefficient thermistor composite material disclosed by the invention is obviously reduced, and meanwhile, the positive temperature coefficient thermistor composite material has a relatively high lift-to-drag ratio. And the application field and range of the positive temperature coefficient thermistor material are expanded.

Description

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Claims

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Application Information

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Owner TIANJIN RUIKEN NEW MATERIAL TECH
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