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A kind of PTC ceramic material and preparation method thereof

A technology for ceramic materials and raw materials, applied in the field of PTC ceramic materials and their preparation, can solve the problems of high room temperature resistivity, low room temperature resistivity, low Curie temperature, etc.

Active Publication Date: 2021-05-04
AUONE ELECTRONICS MFG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

PTC ceramic materials are widely used in self-temperature control heating and current limiting, but at present, the high room temperature resistivity and low Curie temperature of this material limit its development to a certain extent. Therefore, it is urgent to develop a low-temperature ceramic material. PTC Ceramic Materials with Room Temperature Resistivity and High Curie Temperature

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] This embodiment provides a kind of PTC ceramic material, is made of the raw material of following mass percent: BaTiO 3 55%, PbTiO 3 26%, Cr 8%, Ni 6%, MoSi 2 2.5%, ZrB 2 1.2%, CaCO 3 0.5%, SiO 2 0.4%, Al 2 o 3 0.27%, Nb 2 o 5 0.1%, MnCO 3 0.03%.

[0023] The purity of the above-mentioned Cr is 98% or more, and the particle size is 100 mesh.

[0024] The purity of the above-mentioned Ni is 99% or more, and the particle size is 120 mesh.

[0025] The present embodiment also provides a kind of preparation method of PTC ceramic material, comprises the following steps:

[0026] (1) Take BaTiO according to the above formula ratio 3 , PbTiO 3 , Cr, Ni, MoSi 2 , ZrB 2 , CaCO 3 , SiO 2 、Al 2 o 3 , Nb 2 o 5 , MnCO 3 ;

[0027] (2) BaTiO 3 、MoSi 2 , CaCO 3 、Al 2 o 3 , MnCO 3 Mixing, using the mass ratio of material: ball: water = 1:1:2, wet ball milling the mixture at a speed of 5000r / min for 24 hours, and drying at 105°C for 8 hours to obtain...

Embodiment 2

[0036] This embodiment provides a kind of PTC ceramic material, is made of the raw material of following mass percent: BaTiO 3 58%, PbTiO 3 27%, Cr 6%, Ni 4%, MoSi 2 2%, ZrB 2 1.5%, CaCO 3 0.6%, SiO 2 0.5%, Al 2 o 3 0.2%, Nb 2 o 5 0.16%, MnCO 3 0.04%.

[0037] The purity of the above-mentioned Cr is 98% or more, and the particle size is 100 mesh.

[0038] The purity of the above-mentioned Ni is 99% or more, and the particle size is 120 mesh.

[0039] The present embodiment also provides a kind of preparation method of PTC ceramic material, comprises the following steps:

[0040] (1) Take BaTiO according to the above formula ratio 3 , PbTiO 3 , Cr, Ni, MoSi 2 , ZrB 2 , CaCO 3 , SiO 2 、Al 2 o 3 , Nb 2 o 5 , MnCO 3 ;

[0041] (2) BaTiO 3 、MoSi 2 , CaCO 3 、Al 2 o 3 , MnCO 3 Mixing, using the mass ratio of material: ball: water = 1:1:2.5, wet ball milling the mixture at a speed of 5500r / min for 21 hours, and drying at 115°C for 6 hours to obtain...

Embodiment 3

[0050] This embodiment provides a kind of PTC ceramic material, is made of the raw material of following mass percent: BaTiO 3 60%, PbTiO 3 25%, Cr 5%, Ni 5%, MoSi 2 2%, ZrB 2 1%, CaCO 3 0.8%, SiO 2 0.6%, Al 2 o 3 0.4%, Nb 2 o 5 0.15%, MnCO 3 0.05%.

[0051] The purity of the above-mentioned Cr is 98% or more, and the particle size is 100 mesh.

[0052] The purity of the above-mentioned Ni is 99% or more, and the particle size is 120 mesh.

[0053] The present embodiment also provides a kind of preparation method of PTC ceramic material, comprises the following steps:

[0054] (1) Take BaTiO according to the above formula ratio 3 , PbTiO 3 , Cr, Ni, MoSi 2 , ZrB 2 , CaCO 3 , SiO 2 、Al 2 o 3 , Nb 2 o 5 , MnCO 3 ;

[0055] (2) BaTiO 3 、MoSi 2 , CaCO 3 、Al 2 o 3 , MnCO 3 Mixing, using the mass ratio of material: ball: water = 1:1:3, wet ball milling the mixture at a speed of 6000r / min for 18 hours, and drying at 125°C for 4 hours to obtain bal...

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Abstract

The invention discloses a PTC ceramic material and a preparation method thereof, which is made of the following raw materials in mass percentage: BaTiO 3 55‑60%, PbTiO 3 25‑30%, Cr 5‑8%, Ni 3‑6%, MoSi 2 2-3%, ZrB 2 1-2%, CaCO 3 0.5‑1%, SiO 2 0.4‑0.8%, Al 2 o 3 0.2‑0.4%, Nb 2 o 5 0.1‑0.2%, MnCO 3 0.03‑0.05%. MoSi added in the present invention 2 and ZrB 2 , which improves the BaTiO 3 The Curie temperature of the base PTC ceramic material is up to 260°C. The present invention achieves the low room temperature resistivity and excellent PTC effect of the PTC ceramic material by adding Cr, Ni and a reasonable and scientific preparation process; the raw materials and process conditions used in the present invention It is easy to implement, has good repeatability of material properties, excellent performance and wide application range.

Description

technical field [0001] The invention relates to a PTC ceramic material and a preparation method thereof, in particular to a BaTiO 3 The invention relates to a PTC ceramic material with a high Curie temperature and a preparation method thereof. Background technique [0002] PTC material is a temperature-sensitive conductive material. PTC (Positive Temperature Coefficient) is a positive temperature coefficient, which refers to a characteristic that the resistivity of a material increases as its temperature rises. PTC ceramic materials are widely used in self-temperature control heating and current limiting, but at present, the high room temperature resistivity and low Curie temperature of this material limit its development to a certain extent. Therefore, it is urgent to develop a low-temperature ceramic material. PTC ceramic material with room temperature resistivity and high Curie temperature. Contents of the invention [0003] The object of the present invention is to p...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/468C04B35/622C04B41/88
CPCC04B35/468C04B35/622C04B41/009C04B41/5116C04B41/88C04B2235/3208C04B2235/3217C04B2235/3234C04B2235/3251C04B2235/3262C04B2235/3418C04B2235/3813C04B2235/3891C04B2235/404C04B2235/5427C04B2235/602C04B2235/656C04B2235/6562C04B2235/6565C04B2235/6567C04B2235/658C04B2235/6582C04B41/4535C04B41/0072
Inventor 欧志文黎何华
Owner AUONE ELECTRONICS MFG
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