Preparation method of TiO2 voltage-sensitive ceramic material

A technology of varistor ceramics and mixed materials, applied in the direction of varistor, varistor core, etc., can solve the problems of high varistor voltage and low nonlinear coefficient of varistor, improve performance and simplify manufacturing process Effect

Inactive Publication Date: 2017-05-31
ANHUI TUOJITAI NOVEL CERAMIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a TiO 2 Preparation method of pressure-sensitive ceramic material to solve existing TiO 2 The problem of high varistor voltage and low nonlinear coefficient of varistor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] This embodiment provides a TiO 2 A method for preparing a pressure-sensitive ceramic material, comprising the following steps:

[0027] (1) Ge powder, Sb 2 o 5 Powder and MnO 2 Powder added to TiO 2 Mix uniformly in the powder to obtain a mixed material, the mass percentage of Ge powder in the mixed material is 1.25%, Sb 2 o 5 The mass percentage of powder is 0.68%, MnO 2 The mass percent of the powder is 0.56%; the Ge powder, the Sb 2 o 5 powder and the MnO 2 The particle size of the powder is 25-40 μm;

[0028] (2) Ball mill the mixed powder prepared in step (1). The ball milling process is to add deionized water or alcohol for ball milling; dry, granulate after passing through a 300-350 mesh standard sieve, and then press the powder with a pressure of 130MPa bulk material;

[0029] (3) Debinding the bulk material obtained in step (2). The debinding process is to heat up to 450°C at a heating rate of 3-8°C / min, keep it warm for 1 hour, and then heat it in a...

Embodiment 2

[0032] This embodiment provides a TiO 2 A method for preparing a pressure-sensitive ceramic material, comprising the following steps:

[0033] (1) Ge powder, Sb 2 o 5 Powder and MnO 2 Powder added to TiO 2 Mix uniformly in the powder to obtain a mixed material, the mass percentage of Ge powder in the mixed material is 1.76%, Sb 2 o 5 The mass percentage of powder is 0.52%, MnO 2 The mass percent of the powder is 0.92%; the Ge powder, the Sb 2 o 5 powder and the MnO 2 The particle size of the powder is 25-40 μm;

[0034] (2) Ball mill the mixed powder prepared in step (1). The ball milling process is to add deionized water or alcohol for ball milling; dry, pass through a 300-350 mesh standard sieve and granulate, and then press the powder with a pressure of 100MPa bulk material;

[0035] (3) Debinding the bulk material obtained in step (2). The debinding process is to heat up to 400°C at a heating rate of 3-8°C / min, keep it warm for 1.5h, and then heat it at 1100-135...

Embodiment 3

[0038] This embodiment provides a TiO 2 A method for preparing a pressure-sensitive ceramic material, comprising the following steps:

[0039] (1) Ge powder, Sb 2 o 5 Powder and MnO 2 Powder added to TiO 2 Mix uniformly in the powder to obtain a mixed material, the mass percentage of Ge powder in the mixed material is 2.24%, Sb 2 o 5 The mass percentage of powder is 0.35%, MnO 2 The mass percent of powder is 1.39%; The Ge powder, the Sb 2 o 5 powder and the MnO 2 The particle size of the powder is 25-40 μm;

[0040] (2) Ball mill the mixed powder prepared in step (1). The ball milling process is to add deionized water or alcohol for ball milling; dry, granulate after passing through a 300-350 mesh standard sieve, and then press the powder with a pressure of 150MPa bulk material;

[0041] (3) Debinding the bulk material obtained in step (2). The debinding process is to heat up to 600°C at a heating rate of 3-8°C / min, keep it warm for 1.5h, and then heat it at 1100-1350...

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Abstract

The invention discloses a preparation method of a TiO2 (titanium dioxide) voltage-sensitive ceramic material, and belongs to the technical field of functional ceramic. The preparation method comprises the following steps of adding Ge powder, Sb2O5 powder and MnO2 powder into TiO2 powder, and uniformly mixing, so as to obtain a mixture; performing ball milling on the obtained mixture, drying, screening by a 300 to 350-mesh standard sieve, granulating, and pressing the powder into a block material at the pressure of 100 to 150MPa; discharging rubber out of the block material, heating at the temperature of 1100 to 1350 DEG C, sintering, and warming for 1.5 to 3h; finally, cooling the sintered block material to room temperature, so as to obtain the TiO2 voltage-sensitive ceramic material. The preparation method has the advantage that Ge, Sb2O5 and MnO2 are blended with TiO2 to prepare a voltage-sensitive ceramic and a voltage-sensitive resistor, so that the manufacturing technology of the voltage-sensitive ceramic resistor is simplified, and the property of the TiO2 voltage-sensitive ceramic resistor is improved.

Description

technical field [0001] The invention relates to the technical field of functional ceramics, in particular to a TiO 2 A method for preparing a pressure-sensitive ceramic material. Background technique [0002] Varistor ceramic is a kind of functional ceramic, which refers to a semiconductor ceramic material that has nonlinear volt-ampere characteristics and its resistance decreases sharply with the increase of voltage at a certain temperature and within a certain voltage range. At present, there are four main types of varistor ceramics - SiC, TiO 2 , SrTiO 3 and ZnO four categories. [0003] In the 1980s, Bell Laboratories in the United States developed TiO in order to replace SiC varistors. 2 It is a varistor whose main material is TiO 2 , usually adding Nb 2 o 5 , BaO, SrO and MnO 2 and other oxides. [0004] TiO 2 The characteristics of the varistor ceramics are that the production process is relatively simple, the cost is low, the flow capacity and capacitance a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/46C04B35/622C04B35/65H01C7/115
CPCC04B35/46C04B35/622C04B35/65C04B2235/3232C04B2235/3267C04B2235/3287C04B2235/40C04B2235/656H01C7/115
Inventor 宋晓超张天宇何东张天舒
Owner ANHUI TUOJITAI NOVEL CERAMIC TECH
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