PTC thermal sensitive ceramic material with high Curie temperature and preparation method thereof

A technology of thermal ceramics and raw materials, which is applied to resistors with positive temperature coefficients, non-adjustable metal resistors, resistors, etc. Good sensitivity, inhibition of lead volatilization, low sintering temperature

Inactive Publication Date: 2017-09-01
汕头市瑞升电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, many researchers and production workers at home and abroad have embarked on the development and research of PTC heat-sensitive ceramic materials with low-temperature sintering and high Curie temperature (Curie temperature greater than 120°C). High, but the comprehensive thermal performance is not good enough to meet the practical application

Method used

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  • PTC thermal sensitive ceramic material with high Curie temperature and preparation method thereof
  • PTC thermal sensitive ceramic material with high Curie temperature and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] First, Ba was synthesized by a solid-phase method 0.4 Pb 0.6 TiO 3 , CaNb 2 o 6 , MnSiO 3 , Li 2 O-B 2 o 3 -SiO 2 Glass powder, LaCrZrO 5 .

[0032] Ba 0.4 Pb 0.6 TiO 3 Prepared by the following process: equipped with BaCO at a molar ratio of 0.4:0.6:1 3 , PbO and TiO 2 , then for BaCO 3 , PbO and TiO 2 Grind and mix well, then BaCO 3 , PbO and TiO 2 Put the mixed material into a corundum crucible, and keep it warm at 1130°C for 120 minutes to get Ba 0.4 Pb 0.6 TiO 3 . Got Ba 0.4 Pb 0.6 TiO 3 After cooling, grind and pass through a 200-mesh sieve for later use.

[0033] CaNb 2 o 6 Prepared by the following process: equip CaCO with a molar ratio of 1:1 3 and Nb 2 o 5 , then for CaCO 3 and Nb 2 o 5 Grind and mix well, then CaCO 3 and Nb 2 o 5 The mixed material was put into an alumina crucible and kept at 1020°C for 120 minutes to obtain CaNb 2 o 6 . Obtained CaNb 2 o 6 After cooling, grind and pass through a 200-mesh sieve for lat...

Embodiment 2

[0050] First, Ba was synthesized by a solid-phase method 0.4 Pb 0.6 TiO 3 , CaNb 2 o 6 , MnSiO 3 , Li 2 O-B 2 o 3 -SiO 2 Glass powder, LaCrZrO 5 .

[0051] Ba 0.4 Pb 0.6 TiO 3 Prepared by the following process: equipped with BaCO at a molar ratio of 0.4:0.6:1 3 , PbO and TiO 2 , then for BaCO 3 , PbO and TiO 2 Grind and mix well, then BaCO 3 , PbO and TiO 2 Put the mixed material into a corundum crucible and keep it warm at 1100°C for 120 minutes to get Ba 0.4 Pb 0.6 TiO 3 . Got Ba 0.4 Pb 0.6 TiO 3 After cooling, grind and pass through a 200-mesh sieve for later use.

[0052] CaNb 2 o 6 Prepared by the following process: equip CaCO with a molar ratio of 1:1 3 and Nb 2 o 5 , then for CaCO 3 and Nb 2 o 5 Grind and mix well, then CaCO 3 and Nb 2 o 5 The mixed material was put into an alumina crucible and kept at 1030°C for 120 minutes to obtain CaNb 2 o 6 . Obtained CaNb 2 o 6 After cooling, grind and pass through a 200-mesh sieve for late...

Embodiment 3

[0069] First, Ba was synthesized by a solid-phase method 0.4 Pb 0.6 TiO 3 , CaNb 2 o 6 , MnSiO 3 , Li 2 O-B 2 o 3 -SiO 2 Glass powder, LaCrZrO 5 .

[0070] Ba 0.4 Pb 0.6 TiO 3 Prepared by the following process: equipped with BaCO at a molar ratio of 0.4:0.6:1 3 , PbO and TiO 2 , then for BaCO 3 , PbO and TiO 2 Grind and mix well, then BaCO 3 , PbO and TiO 2 Put the mixed material into a corundum crucible, and keep it at 1150°C for 120 minutes to get Ba 0.4 Pb 0.6 TiO 3 . Got Ba 0.4 Pb 0.6 TiO 3 After cooling, grind and pass through a 200-mesh sieve for later use.

[0071] CaNb 2 o 6 Prepared by the following process: equip CaCO with a molar ratio of 1:1 3 and Nb 2 o 5 , then for CaCO 3 and Nb 2 o 5 Grind and mix well, then CaCO 3 and Nb 2 o 5 The mixed material was put into an alumina crucible and kept at 1000°C for 120 minutes to obtain CaNb 2 o 6 . Obtained CaNb 2 o 6 After cooling, grind and pass through a 200-mesh sieve for later use....

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Abstract

The invention relates to a PTC thermal sensitive ceramic material with high Curie temperature. The ceramic material is prepared from the following raw materials in percentage by weight: 86-95% of Ba0.4Pb0.6TiO3, 0.01-2.8% of La2O3, 0.1-4.0% of Si3N4, 0.01-1.5% of CaNb2O6, 0.5-2% of MnSiO3, 0.01-2.5% of Li2O-B2O3-SiO2 glass powder and 0.02-1.5% of LaCrZrO5. The invention also provides a preparation method of the PTC thermal sensitive ceramic material with high Curie temperature. The PTC thermal sensitive ceramic material provided by the invention is high in Curie temperature, low in room temperature resistivity, high in liftdrag ratio, great in temperature coefficient of resistance (alpha) and good in comprehensive thermosensitive performance. The sintering temperature is low during preparation, the cost can be lowered, volatilization of lead is inhibited, and the environment is not polluted.

Description

technical field [0001] The invention relates to the technical field of inorganic non-metallic materials, in particular to a high Curie temperature PTC heat-sensitive ceramic material and a preparation method thereof. Background technique [0002] PTC ceramic is a semiconducting electronic ceramic material with a positive temperature coefficient (Positive Temperature Coefficient, referred to as: PTC); intelligent electronic ceramic components with this characteristic integrate heating and temperature control, with automatic temperature control, safety and energy saving , automatic recovery, non-contact action, no open flame, long life and other characteristics; the product can be used in heating components, temperature control, overcurrent protection, overheating protection and thermal induction and other systems, widely used in automobiles, electronics, communications, transmission and transformation Electrical engineering, air-conditioning heater engineering, low-energy saf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/472C04B35/622C04B41/88H01C7/02
CPCC04B35/472C04B35/622C04B41/009C04B41/5116C04B41/88C04B2235/3203C04B2235/3208C04B2235/3215C04B2235/3227C04B2235/3232C04B2235/3251C04B2235/3262C04B2235/3296C04B2235/3409C04B2235/3418C04B2235/3873C04B2235/602C04B2235/656C04B2235/6567H01C7/025
Inventor 陈映义牛继恩彭道华肖文华杨开恩
Owner 汕头市瑞升电子有限公司
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