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Preparation method of stannic oxide electrode

A tin dioxide and electrode technology, applied in the field of ceramics, can solve the problems of glass liquid erosion, high normal temperature resistivity of tin dioxide electrodes, etc., and achieve the effect of low normal temperature resistivity and high density

Inactive Publication Date: 2011-01-19
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above research method can meet the production needs, the tin dioxide electrode still has the disadvantages of high resistivity at room temperature and severe erosion by glass liquid.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] SnO2 powder (particle size 8 μm, purity ≥ 98%), copper hydroxide powder (particle size 4 μm, purity ≥ 98%), and metal antimony powder (particle size 4 μm, purity ≥ 98%) were mixed according to 100:0.2: The mass ratio of 0.05 was weighed and put into a polyurethane tank for ball milling and wet mixing. The mass ratio of balls, material and water was 2:1:1, and ball milled for 15 hours. The balls used were yttria-stabilized zirconia ceramic balls. The mixed slurry was dried at 130°C for 20 hours, passed through a 100-mesh sieve, and then put into a rubber sheath mold and kept under pressure of 150 MPa for 7 minutes by cold isostatic pressing. Put the green body into a molybdenum disilicide resistance furnace, evacuate to below -0.08MPa, feed oxygen with a purity of 98% to a pressure of 0.11MPa in the furnace, and slowly heat to 1460°C for 10 hours with electricity. The density of the final product is 94.3%, and the resistivity at room temperature is 21.5Ω.cm.

Embodiment 2

[0014] SnO2 powder (particle size 5 μm, purity ≥ 98%), copper hydroxide powder (particle size 2 μm, purity ≥ 98%), and metal antimony powder (particle size 2 μm, purity ≥ 98%) were mixed according to 100:0.9: The mass ratio of 0.5 was weighed and put into a polyurethane tank for ball milling and wet mixing. The mass ratio of balls, material and water was 2:1:1, and ball milling was performed for 15 hours. The balls used were yttria-stabilized zirconia ceramic balls. The mixed slurry was dried at 130°C for 20 hours, passed through a 100-mesh sieve, and then put into a rubber sheath mold and kept under pressure of 150 MPa for 7 minutes by cold isostatic pressing. Put the green body into a molybdenum disilicide resistance furnace, evacuate to below -0.08MPa, feed oxygen with a purity of 98% to a pressure of 0.14MPa in the furnace, and slowly heat to 1480°C for 8 hours with electricity. The density of the final product is 96.4%, and the resistivity at room temperature is 7.3Ω.cm. ...

Embodiment 3

[0016] SnO2 powder (particle size 3 μm, purity ≥ 99%), copper carbonate powder (particle size 1 μm, purity ≥ 99%), and metal antimony powder (particle size 1 μm, purity ≥ 99%) were mixed according to the ratio of 100: 1.0: 0.7 The mass ratio was weighed and put into a polyurethane tank for ball milling and wet mixing. The mass ratio of balls, material and water was 3:1:1, and ball milling was performed for 20 hours. The balls used were yttria-stabilized zirconia ceramic balls. The mixed slurry was dried at 140°C for 15 hours, passed through a 200-mesh sieve, and then put into a rubber sheath mold and kept under a pressure of 170 MPa for 5 minutes by cold isostatic pressing. Put the green body in a molybdenum disilicide resistance furnace, evacuate to below -0.08MPa, feed oxygen with a purity of 98% to a pressure of 0.17MPa in the furnace, and slowly heat to 1490°C for 7 hours with electricity. The density of the final product is 97.3%, and the resistivity at room temperature i...

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Abstract

The invention belongs to the technical field of ceramics, relating to a preparation method of a stannic oxide electrode. The preparation method of the stannic oxide electrode comprises the following steps: placing stannic oxide powder, copper hydroxide or copper carbonate powder and metal stibium powder in a polyurethane tank for ball milling and wet mixing evenly according to a mass ratio of 100:0.2-1.5:0.05-1.0; drying and screening the evenly mixed slurry and then putting in a rubber sleeve die for molding by using cold isostatic pressing; placing the molded green body in a molybdenum disilicide resistor furnace; vacuumizing, and introducing oxygen with the purity of over 98% until the pressure therein reaches 0.1-0.2 MPa; and electrifying and heating to 1450-1500 DEG C and keeping heat for 3-10h. The invention has simple preparation process and less doping, and the obtained stannic oxide electrode has high density and low normal temperature resistivity.

Description

technical field [0001] The invention relates to the technical field of ceramics, and mainly relates to a preparation method of a tin dioxide electrode. Background technique [0002] The tin dioxide electrode is an n-type semiconductor, which has the advantages of strong conductivity (temperature higher than 1000 ° C), no pollution to glass, etc., and is widely used in lead glass, optical glass (crown glass, barium crown glass), spectacle glass and Electric melting furnace for special glass. In-depth research on tin dioxide electrodes has been carried out at home and abroad, and there are many published literature patents. The research method is mainly based on tin dioxide powder as the main raw material, introducing a certain amount of CuO, MnO 2 , ZnO (burning aid) and Sb 2 o 3 、 Bi 2 o 3 (Reduce the resistance) and other oxides are formed by cold isostatic pressing and fired at a certain temperature. Although the above research method can meet the production needs, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/457C04B35/622
Inventor 王来稳王刚周继伟王龙庆姜欣周军
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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