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Barium titanate-based thermosensitive resistance material with low B value and high resistivity and preparation method thereof

A thermistor, high resistivity technology, applied in the field of electronic ceramic materials, to achieve the effects of high rated resistance, low preparation cost and excellent sintering performance

Inactive Publication Date: 2012-10-17
成都顺康三森电子有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no patent report on BT-BN series negative temperature coefficient resistance ceramics

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  • Barium titanate-based thermosensitive resistance material with low B value and high resistivity and preparation method thereof
  • Barium titanate-based thermosensitive resistance material with low B value and high resistivity and preparation method thereof

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Embodiment 1

[0021] Embodiment 1: As shown in 1# in table 1, a kind of barium titanate base low B value, high resistivity thermistor material described in the present embodiment is according to chemical general formula:

[0022] (Ba 0.5 Pb 0.5 )TiO 3 +0.25mol% Y 2 o 3 +2mol%PbO+xmol%BN+ymol%MnO 2

[0023] x=2, y=0.00 proportioning, synthesized with the solid-phase reaction method of existing ceramic technology, at first with barium carbonate, titanium dioxide, plumbous oxide, yttrium oxide, boron nitride, manganese oxide as raw material, through weighing proportioning, Remixing, pulverizing with ball mill, drying, pre-burning at 900°C for 2 hours, then ball milling for the second time, adding binder to granulate, forming, and heat preservation at 1200°C for 2 hours, and the sintered sample was electroded, Then the performance parameter test is carried out to obtain the thermosensitive material. The test results are shown in 1# in Table 1.

[0024] Table 1 is the ratio and test resu...

Embodiment 2

[0025] Embodiment 2: as shown in 2# in table 1, present embodiment is similar to embodiment 1, according to general chemical formula:

[0026] (Ba 0.5 Pb 0.5 )TiO 3 +0.25mol% Y 2 o 3 +2mol%PbO+xmol%BN+ymol%MnO 2

[0027] x=2, y=0.04 ratio, synthesized by the solid-phase reaction method of the existing ceramic technology, first with barium carbonate, titanium dioxide, lead oxide, yttrium oxide, boron nitride, manganese oxide as raw materials, through weighing and proportioning, Re-mixing, pulverizing with ball mill, drying, pre-burning at 900°C for 2 hours, then ball milling for the second time, adding binder to granulate, forming, and holding at 1200°C for two hours, and the sintered sample was processed. The electrodes are then tested for performance parameters to obtain heat-sensitive materials. The test results are shown in 2# in Table 1.

Embodiment 3

[0028] Embodiment 3: as shown in 6# in table 1, present embodiment is similar to embodiment 1, according to general chemical formula:

[0029] (Ba 0.5 Pb 0.5 )TiO 3 +0.25mol% Y 2 o 3 +2mol%PbO+xmol%BN+ymol%MnO 2

[0030] x=2, y=0.06 ratio, synthesized by the solid-phase reaction method of the existing ceramic technology, first with barium carbonate, titanium dioxide, lead oxide, yttrium oxide, boron nitride, manganese oxide as raw materials, after weighing the ratio, Re-mixing, pulverizing with ball mill, drying, pre-burning at 900°C for 2 hours, then ball milling for the second time, adding binder to granulate, forming, and holding at 1200°C for two hours, and the sintered sample was processed. The electrodes are then tested for performance parameters to obtain heat-sensitive materials. The test results are shown in 6# in Table 1.

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Abstract

The invention relates to the field of electronic ceramic materials, and relates to a barium titanate-based thermosensitive resistance material with low B value and high resistivity and a preparation method thereof. The thermosensitive resistance material is characterized in that the chemical general formula is (Ba0.5Pb0.5)TiO3 + 0.25mol%Y2O3 + 2mol%PbO + xmol%BN + ymol%MnO2, wherein x is more than or equal to 2 and less than or equal to 20, and y is more than or equal to 0.0 and less than or equal to 0.06. The method for preparing the barium titanate-based thermosensitive resistance material with negative temperature coefficient by using a solid phase reaction method comprises the following steps of: weighing barium titanate, titanium dioxide, lead dioxide, yttrium oxide, boron nitride and manganese oxide serving as raw materials based on the proportion in the chemical general formula; and performing a ceramic process, namely blending, ball-milling, crushing and drying the raw materials, pre-sintering the mixture for 2 hours at the temperature of 900 DEG C, then performing secondary ball milling and crushing on the mixture, adding adhesive into the mixture, granulating and shapingthe mixture, preserving the heat for 2 hours at the temperature of 1,200 DEG C, and treating the sintered sample by an electrode to form the thermosensitive resistance material.

Description

technical field [0001] The invention relates to the field of electronic ceramic materials, and relates to a negative temperature coefficient thermistor material and its preparation technology, in particular to a barium titanate-based thermistor material with low B value and high resistivity. Background technique [0002] The basic characteristics of the existing negative temperature coefficient thermistor materials determine the main parameters of the thermistor element. The commonly used thermistor materials are prepared by the oxides of transition metals Mn, Fe, CO, Ni, and Cu in different proportions. The resistivity is from several ohm centimeters to several thousand ohm centimeters, the B value is from 2000-6000K, and the resistance value of the thermistor element used to make it is several ohms to several megaohms. [0003] According to the oxide semiconductor theory B=ΔE / 2K [0004] In the formula, K is the Boltzmann constant (8.62*10 5 ev), ΔE is the activation ene...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/472C04B35/622
Inventor 杨敬义
Owner 成都顺康三森电子有限责任公司
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