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ZrO2-based conductive ceramic and preparation method thereof

A technology of conductive ceramics and conductive materials, which is applied in the field of preparation of conductive ceramic materials, can solve the problems of difficult sintering and densification, high sintering temperature, and high sintering cost, and achieve the goals of reducing sintering temperature, improving stability, and improving compactness and mechanical properties Effect

Pending Publication Date: 2020-11-20
DONGGUAN XINBO STRUCTURAL CERAMICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, SiC, Si 3 N 4 , BN-based conductive ceramics, such ceramics are difficult to be sintered densely under normal pressure sintering, usually using hot pressing sintering, the sintering temperature is high, generally around 1900°C, the sintering cost is high, and the energy consumption is large

Method used

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  • ZrO2-based conductive ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] a ZrO 2 The preparation method of base conductive ceramics, its step comprises:

[0029] (1) Put 65 copies of Y 2 o 3 Stabilized ZrO 2 Powder, 40 parts of TiN, 5 parts of Si powder, 0.5 parts of polyethylene glycol, 1 part of ammonium polyacrylate, 1 part of polyvinyl alcohol and 100 parts of water were added to the ball mill jar for ball milling, ZrO 2 The ball was used as the ball milling medium, and the ball was milled for 6 hours to obtain the slurry;

[0030] (2) The slurry is sprayed and granulated in a spray dryer, the inlet temperature is 250°C, the outlet temperature is 140°C, the feed frequency is 18HZ, and the atomization frequency is 24HZ to obtain powder A;

[0031] (3) Pass powder A through a 80-mesh sieve, take the powder under the sieve and pass through a 240-mesh sieve, and take the powder on the sieve to obtain powder B of 80-240 mesh;

[0032] (4) Carry out dry pressing molding to the powder material B that step (3) makes under the condition of 5...

Embodiment 2

[0035] a ZrO 2 The preparation method of base conductive ceramics, its step comprises:

[0036] (1) Put 70 copies of Y 2 o 3 Stabilized ZrO 2 Powder, 30 parts of TiC, 4 parts of Co powder, 2 parts of polyethylene glycol, 1.5 parts of ammonium polyacrylate, 0.8 parts of polyvinyl alcohol and 120 parts of water were added to the ball mill jar for ball milling, ZrO 2 The ball was used as the ball milling medium, and the ball was milled for 8 hours to obtain the slurry;

[0037] (2) The slurry is sprayed and granulated in a spray dryer, the inlet temperature is 280°C, the outlet temperature is 120°C, the feed frequency is 20HZ, and the atomization frequency is 22HZ to obtain powder A;

[0038] (3) Pass powder A through a 80-mesh sieve, take the powder under the sieve and pass through a 240-mesh sieve, and take the powder on the sieve to obtain powder B of 80-240 mesh;

[0039] (4) Carry out dry pressing molding to the powder material B that step (3) makes under the condition ...

Embodiment 3

[0042] a ZrO 2 The preparation method of base conductive ceramics, its step comprises:

[0043](1) Put 80 copies of Y 2 o 3 Stabilized ZrO 2 Powder, 10 parts of TiN, 30 parts of TiB 2 , 20 parts of TiC, 8 parts of Al powder, 1.6 parts of polyethylene glycol, 1.2 parts of ammonium polyacrylate, 0.6 parts of polyvinyl alcohol and 90 parts of water are added to the ball mill jar for ball milling, ZrO 2 The ball was used as the ball milling medium, and the ball was milled for 10 hours to obtain the slurry;

[0044] (2) The slurry is sprayed and granulated in a spray dryer, the inlet temperature is 300°C, the outlet temperature is 110°C, the feed frequency is 18HZ, and the atomization frequency is 20HZ to obtain powder A;

[0045] (3) Pass powder A through a 80-mesh sieve, take the powder under the sieve and pass through a 240-mesh sieve, and take the powder on the sieve to obtain powder B of 80-240 mesh;

[0046] (4) Carry out dry pressing molding to the powder material B th...

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Abstract

The invention provides ZrO2-based conductive ceramic and a preparation method thereof. The preparation method comprises the steps that 1, adding Y2O3-stabilized ZrO2 powder, a conductive material, a sintering aid, a binder, a dispersing agent, a plasticizer and water into a ball milling tank to be subjected to ball milling to prepare a slurry; (2) performing spray granulation on the slurry to obtain powder A; (3) sieving the powder A to obtain powder B; (4) carrying out dry pressing molding on the powder B to obtain a molded green body; and (5) carrying out glue discharging and sintering on the molded green body in a reducing atmosphere at the sintering temperature of 1450-1650 DEG C to prepare the ZrO2-based conductive ceramic. According to the preparation method, ZrO2-based conductive ceramic is adopted; the preparation method is simple, the sintering temperature can be reduced, the sintering cost can be reduced, the energy consumption can be reduced, large-batch production can be carried out, the density of the prepared conductive ceramic can reach 98%, the three-point bending strength reaches 450-700 MPa, the Vickers hardness is 1000-1300 HV, the resistance is 1 ohm or below, and the performance requirements can be met.

Description

technical field [0001] The invention relates to the technical field of preparation of conductive ceramic materials, in particular to a ZrO 2 Based conductive ceramics and preparation methods 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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622
CPCC04B35/48C04B35/622C04B2235/3225C04B2235/3886C04B2235/428C04B2235/5427C04B2235/5436C04B2235/602C04B2235/656C04B2235/6567C04B2235/6582C04B2235/96C04B2235/77
Inventor 纪文义刘锋罗建周张富唐丽
Owner DONGGUAN XINBO STRUCTURAL CERAMICS CO LTD
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