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Novel stannic acid barium based conductive ceramics and method of manufacturing the same

A technology for conductive ceramics and conductive ceramic materials, applied in the field of conductive ceramic materials, can solve problems such as no cause, and achieve the effects of low resistivity, simple preparation process and stable chemical properties

Inactive Publication Date: 2009-04-08
GUILIN UNIV OF ELECTRONIC TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Conductive ceramics are generally ABO 3 The perovskite material of the general formula, as early as the 1950s, people were studying LaCaMnO 3 When studying the characteristics of ceramic materials doped with rare earth oxides, it was found that such materials have good electrical conductivity, but it did not attract people's attention at that time.

Method used

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  • Novel stannic acid barium based conductive ceramics and method of manufacturing the same
  • Novel stannic acid barium based conductive ceramics and method of manufacturing the same
  • Novel stannic acid barium based conductive ceramics and method of manufacturing the same

Examples

Experimental program
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Effect test

Embodiment 1

[0014] To analyze pure BaCO 3 , SnO 2 and Sb 2 o 3 Raw material, according to the chemical formula BaSb 0.06 sn 0.94 o 3 Carry out batching, wet grinding with absolute ethanol as the medium, dry at 80°C and keep warm in the air at 1300°C for 2 hours to pre-synthesize ceramic blanks; the ceramic blanks are passed through a 300-mesh sieve after secondary ball milling and drying, and then add 3% concentration of PVA solution is used as a binder, pressed into a disc with a diameter of 18mm and a thickness of 1-1.4mm under a pressure of 100MPa, and the binder is discharged at a heating rate of 150℃ / h at 600℃ for 2 hours, and then heated at 300℃ / h The heating rate is kept at 1550°C for 2 hours, and finally cooled to room temperature with the furnace; the sintered ceramic sheet is ground to 1.00±0.02mm with sandpaper, and silver electrodes are used on both sides. XRD test shows that the ceramic is a single-phase solid solution and no impurity phase is formed. SEM photos show t...

Embodiment 2

[0016] To analyze pure BaCO 3 , SnO 2 and Sb 2 o 3 Raw material, according to the chemical formula BaSb 0.1 sn 0.9 o 3 Carry out batching, wet grinding with absolute ethanol as the medium, dry at 80°C and keep warm in the air at 1300°C for 2 hours to pre-synthesize ceramic blanks; the ceramic blanks are passed through a 300-mesh sieve after secondary ball milling and drying, and then add 3% concentration of PVA solution is used as a binder, pressed into a disc with a diameter of 18mm and a thickness of 1-1.4mm under a pressure of 100MPa, and the binder is discharged at a heating rate of 150℃ / h at 600℃ for 2 hours, and then heated at 300℃ / h The heating rate is kept at 1550°C for 2 hours, and finally cooled to room temperature with the furnace; the sintered ceramic sheet is ground to 1.00±0.02mm with sandpaper, and silver electrodes are used on both sides. XRD test shows that the ceramic is a single-phase solid solution and no impurity phase is formed. SEM photos show tha...

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Abstract

The invention discloses a novel barium-stannate-based conductive ceramic material and a method for preparing the same. The method comprises the following steps: adding antimony oxides into BaSnO3 which is easy to be semiconductive to realize donor doping, and adopting the prior ceramic preparation process to form conductive ceramics the compositions of which can be expressed by a general formula BaSbxSn1-xO3, wherein x is more than 0 and less than or equal to 2. The novel barium-stannate-based conductive ceramic material has the advantages of low cost, good electrical conductivity, stable chemical property, stable resistivity, and high temperature resistance. The room temperature resistivity of the novel barium-stannate-based conductive ceramic material is less than 1.0 omega.cm. Besides, the novel barium-stannate-based conductive ceramic material has simple and stable preparation process and strong practicality.

Description

technical field [0001] The invention relates to a conductive ceramic material, in particular to a novel barium stannate-based conductive ceramic and a preparation method thereof. Background technique [0002] Conductive ceramics belong to new functional special ceramics, which are a kind of basic materials. It not only has various properties of ceramics, such as anti-oxidation, high temperature resistance, corrosion resistance, low cost, good mechanical properties, etc., but also has the electrical conductivity of metal. Its resistivity can be adjusted in a wide range, so it is used in many special environments and occasions, which is unmatched by other materials. Conductive ceramics can generate electrons (holes), ions (vacancies), etc. under certain conditions, and under the action of an electric field, directional movement of charges can occur (with conductor resistivity). Conductive ceramics have the characteristics of good electrical conductivity, stable chemical prop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/457C04B35/622
Inventor 刘心宇杨华斌黄晋袁昌来
Owner GUILIN UNIV OF ELECTRONIC TECH
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