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High-Curie-point lead-free PTCR (Positive Temperature Coefficient of Resistance) thermo-sensitive ceramic material

A heat-sensitive ceramic with a high Curie point technology, applied in the field of PTCR heat-sensitive ceramic materials, can solve the problems of few reports on heat-sensitive ceramic temperature control materials, and achieve the effect of avoiding the harm of the environment and human body

Inactive Publication Date: 2010-08-04
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] It can be seen from this that although environmentally friendly PTCR thermosensitive ceramic materials have far-reaching social significance and economic benefits, but from the published literature and patents, the Curie temperature is 120-300 ° C, good performance, and positive There are quite few reports on the results of a series of thermosensitive ceramic temperature control materials with temperature coefficients

Method used

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  • High-Curie-point lead-free PTCR (Positive Temperature Coefficient of Resistance) thermo-sensitive ceramic material
  • High-Curie-point lead-free PTCR (Positive Temperature Coefficient of Resistance) thermo-sensitive ceramic material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] This example presses molecular formula (Bi 1 / 2 K 1 / 2-a / 2 Na a / 2 ) Ce 1-b D. b o 3 +cM for batching, where a=0, b=0.003. The initial raw material is selected from Bi 2 o 3 、K 2 CO 3 , CeO 2 , Sb 2 o 3 . Materials were prepared according to the following experimental process steps:

[0020] ①Press the initial raw material to Bi 0.5 K 0.5 Ce0.997 Sb 0.003 o 3 Formula ingredients, weighing 72.07g Bi 2 o 3 , 21.36g K 2 CO 3 , 106.38g CeO 2 , 0.275g Sb 2 o 3 ;

[0021] ②Weigh the Bi weighed in the previous step 2 o 3 、K 2 CO 3 , CeO 2 and Sb 2 o 3 Put it into the ball mill jar, and add appropriate distilled water and ball mill mixture for 4 hours;

[0022] ③Place the mixed slurry prepared in the previous step in a glass vessel and put it into an oven to heat and dry;

[0023] ④Calcinate the powder obtained in the previous step at a temperature of 800°C and keep it warm for 2 hours;

[0024] ⑤ The powder synthesized in the previous step is gra...

Embodiment 2

[0030] This example presses molecular formula (Bi 1 / 2 K 1 / 2-a / 2 Na a / 2 ) Ce 1-b D. b o 3 +cM for batching, where a=1, b=0.0026. The initial raw material is selected from Bi 2 o 3 、Na 2 CO 3 , CeO 2 , Sb 2 o 3 . Materials were prepared according to the following experimental process steps:

[0031] ①Press the initial raw material to Bi 0.5 Na 0.5 Ce 0.9974 Sb 0.0026 o 3 Formula ingredients, weighing 73.91g Bi 2 o 3 , 16.79g Na 2 CO 3 , 109.09g CeO 2 , 0.277g Sb 2 o 3 ;

[0032] ②The preparation process is the same as the steps ②~⑧ in Example 1.

[0033] Prepared material properties are shown in Table 1 and figure 1 shown.

Embodiment 3

[0035] This example presses molecular formula (Bi 1 / 2 K 1 / 2-a / 2 Na a / 2 ) Ce 1-b D. b o 3 +cM for batching, where a=0.4, b=0.003. The initial raw material is selected from Bi 2 o 3 、K 2 CO 3 、Na 2 CO 3 , CeO 2 , Sb 2 o 3 . Materials were prepared according to the following experimental process steps:

[0036] ①Press the initial raw material to Bi 0.5 K 0.3 Na 0.5 Ce 0.997 Sb 0.003 o 3 Formula ingredients, weighing 36.54g Bi 2 o 3 , 6.5g K 2 CO 3 , 3.31g Na 2 CO 3 , 53.72g CeO 2 , 0.136g Sb 2 o 3 ;

[0037] ②The preparation process is the same as the steps ②~⑧ in Example 1.

[0038] Prepared material properties are shown in Table 1 and figure 1 shown.

[0039] Table 1 embodiment material performance index

[0040]

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Abstract

The invention relates to a semi-conductive ceramic material, in particular to a thermo-sensitive ceramic resistance material which accords with the semi-conduction of a high-Curie-point (larger than 120 DEG C) lead-free ceramic material and has PTCR (Positive Temperature Coefficient of Resistance). The material comprises (Bi1 / 2K1 / 2-a / 2Naa / 2)Ce1-bDbO3, wherein a equals to 0-1, and b equals to 0.0005-0.005. The high-Curie-point PTCR thermo-sensitive ceramic material does not contain lead, is made of wide and rich raw materials and prevents lead of resistance components from harming the environment and human beings in the manufacture and use processes. The invention solves the technical problems of content design and material semi-conduction of the lead-free high-Curie-point PTCR thermo-sensitive ceramic material and can realize the adjustability of Curie points in a wider temperature range by adjusting the formulation of main components.

Description

technical field [0001] The invention belongs to a kind of semiconductor ceramic material, especially the PTCR which complies with the lead-free high Curie point ferroelectric ceramic material to realize semiconduction and prepare the lead-free high Curie point thermosensitive ceramic resistance element with positive temperature coefficient of resistance (PTCR) effect. Heat sensitive ceramic material. Background technique [0002] PTCR ceramic is a semiconducting electronic ceramic material with a positive temperature coefficient of resistance (PositiveTemperature Coefficient of Resistance). This intelligent electronic ceramic component integrates heating and temperature control, and has the characteristics of automatic temperature control, safety and energy saving, automatic recovery, non-contact action, no open flame, and long life. The products can be used in heating components, temperature control, overcurrent protection, overheating protection, thermal induction and tem...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50
Inventor 张鸿李志成
Owner CENT SOUTH UNIV
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