High-curie point lead-free PTC thermal sensitive ceramic resistor material

A technology of heat-sensitive ceramics and resistance materials, applied in the field of PTC thermistor materials, can solve the problems of few reports on the results of heat-sensitive ceramic temperature control materials, and achieve the effect of avoiding the harm of lead to the environment and human body

Inactive Publication Date: 2009-04-22
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 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 adjustable from 120 to 300 ° C, with good performance, There are quite few reports on the achievements of a series of thermosensitive ceramic temperature control materials with positive temperature coefficients

Method used

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  • High-curie point lead-free PTC thermal sensitive ceramic resistor material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022]This example presses molecular formula (Bi 1 / 2 K 1 / 2 ) Ti 1-x Ce x Sb y o 3 Dosing was performed where x = 0.2, y = 0.003. The initial raw material is selected from Bi 2 o 3 、K 2 CO 3 , tetra-n-butyl titanate [CH 3 (CH 2 ) 3 O] 4 Ti, CeO 2 , Sb 2 o 3 . Materials were prepared according to the following experimental process steps:

[0023] ①Press the initial raw material to Bi 0.5 K 0.5 Ti 0.797 Ce 0.2 Sb 0.003 o 3 Formula ingredients, weighing 46.64g Bi 2 o 3 , 13.83g K 2 CO 3 , 25.32g[CH 3 (CH 2 ) 3 O] 4 Ti, 13.78g CeO 2 , 0.175g Sb 2 o 3 ;

[0024] ②Weigh the Bi weighed in the previous step 2 o 3 and K 2 CO 3 Dissolve in dilute nitric acid; the [CH 3 (CH 2 ) 3 O] 4 Ti was dissolved in absolute ethanol; the CeO weighed in the previous step 2 and Sb 2 o 3 Dissolve in the mixed solution of nitric acid and hydrogen peroxide;

[0025] ③Mix the three mixed solutions prepared in the previous step, and use a magnetic stirring heate...

Embodiment 2

[0033] This example presses molecular formula (Bi 1 / 2 K 1 / 2 ) Ti 1-x Ce x Sb y o 3 Dosing was performed where x = 0.35, y = 0.0026. The initial raw material is selected from Bi 2 o 3 、K 2 CO 3 、[CH 3 (CH 2 ) 3 O] 4 Ti, CeO 2 , Sb 2 o 3 . Materials were prepared according to the following experimental process steps:

[0034] ①Press the initial raw material to Bi 0.5 K 0.5 Ti 0.65 Ce 0.35 Sb 0.0026 o 3 Formula ingredients, weighing 53.86gBi 2 o 3 , 15.97g K 2 CO 3 , 102.14g[CH 3 (CH 2 ) 3 O] 4 Ti, 27.85g CeO 2 , 0.17g Sb 2 o 3 ;

[0035] ②The preparation process is the same as the steps ②~⑧ in Example 1.

[0036] Prepared material properties are shown in Table 1 and figure 1 shown.

Embodiment 3

[0038] This example presses molecular formula (Bi 1 / 2 K 1 / 2 ) Ti 1-x Ce x Sb y o 3 Dosing was performed where x = 0.45, y = 0.0026. The initial raw material is selected from Bi 2 o 3 、K 2 CO 3 、[CH 3 (CH 2 ) 3 O] 4 Ti, CeO 2 , Sb 2 o 3 . Materials were prepared according to the following experimental process steps:

[0039] ①Press the initial raw material to Bi 0.5 K 0.5 Ti 0.55 Ce 0.45 Sb 0.0026 o 3 Formula ingredients, weighing 56.03g Bi 2 o 3 , 16.62g K 2 CO 3 , 89.92g[CH 3 (CH 2 ) 3 O] 4 Ti, 37.26g CeO 2 , 0.18g Sb 2 o 3 ;

[0040] ②The preparation process is the same as the steps ②~⑧ in Example 1.

[0041] Prepared material properties are shown in Table 1 and figure 1 shown.

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Abstract

The invention relates to a high Curie point leadless PTC thermal sensitive ceramic resistor material, which comprises the main component of (Bi1 / 2K1 / 2)Ti1-x-wCexDyO3, wherein x is equal to between 0.2 and 0.5, y is equal to between 0.001 and 0.004, and w is equal to between -0.02 and 0.02; D is a semiconductive element consisting of at least one of the elements of Sb, Nb, Ta, and V; and a few additive components can be added to the formulation in addition, such as a compound of oxide, inorganic salt or organic salt and the like which contains at least one metallic element from elements of B, Si, Al, Mn and the like. The high Curie point PTC thermal sensitive ceramic material does not contain lead to avoid the harm to the environment and human bodies in the manufacturing process and the using process of resistor components. The method solves the technical problem of semiconducting of the high Curie point leadless PTC thermal sensitive ceramic resistor material, and can achieve PTC thermal sensitive ceramic resistor materials with different Curie points through adjusting the main component.

Description

technical field [0001] The invention relates to a semiconductor material, especially a PTC thermistor that complies with lead-free high Curie point ferroelectric ceramic material to realize semiconduction and prepares a lead-free high Curie point thermosensitive ceramic resistance element with positive temperature coefficient (PTC) effect. Material. Background technique [0002] PTCR ceramic is a semiconducting electronic material with a positive temperature coefficient of resistance (PositiveTemperature coefficient of resistivity). The intelligent electronic ceramic component with this characteristic 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. Products can be used in heating components, temperature control, overcurrent protection, overheating protection and thermal induction systems, widely used in automobiles, electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/462C04B35/50C04B35/63
Inventor 李志成张鸿闻俊涛郑阳郜长福
Owner CENT SOUTH UNIV
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