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Preparation method of novel piezoelectric ceramic spherical shell

A technology of piezoelectric ceramics and ceramic balls, which is applied in the field of preparation of new piezoelectric ceramic spherical shells, can solve the problems that the inner walls of the ceramic spherical shells cannot be guaranteed to be smooth, and the piezoelectric ceramic spherical shells cannot meet the requirements for use, so as to achieve a clean interior. Effects of residue, high strength, uniform density

Pending Publication Date: 2021-06-01
ZIBO YUHAI ELECTRONICS CERAMIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The waxy ball formed when the waxy material is poured into the hollow spherical mold is put into the rubber hollow ball mold and formed by hydrostatic pressure. The molding pressure deforms the waxy ball and cannot ensure the smoothness of the inner wall of the ceramic spherical shell, thus making the piezoelectric ceramic ball The shell does not meet the requirements for use

Method used

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  • Preparation method of novel piezoelectric ceramic spherical shell
  • Preparation method of novel piezoelectric ceramic spherical shell
  • Preparation method of novel piezoelectric ceramic spherical shell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The preparation method of the novel piezoelectric ceramic spherical shell described in Example 1 consists of the following steps:

[0037] (1) Mix 600 grams of high-purity lead and 1,400 grams of high-purity tin and heat in a high-temperature furnace. When heated to 220°C, the lead-tin alloy starts to melt, and keep warm for 5 minutes until it is completely melted. At the same time, heat the hollow ball mold of ductile iron with an inner diameter of 69.5mm to keep the inner wall at 130°C. After the lead and tin are completely melted, pour the liquid into the hollow ball mold, stop heating the hollow ball mold of ductile iron and wait for it to cool down naturally. 20°C, a 68mm lead-tin alloy ball was obtained after cooling.

[0038] (2) The thin handle of the lead-tin alloy ball is processed into a cylinder with a diameter of 25 mm and a diameter of 8 mm. The inner diameter of the rubber hollow ball is 88 mm. The distance between the ball and the inner wall of the rubb...

Embodiment 2

[0062] The preparation method of the novel piezoelectric ceramic spherical shell described in Example 2 consists of the following steps:

[0063] (1) Mix 560 grams of high-purity lead and 1440 grams of high-purity tin, heat in a high-temperature furnace, and the lead-tin alloy starts to melt when heated to 240°C, and keep warm for 10 minutes after it is completely melted. At the same time, the hollow ball mold with an inner diameter of 98.5mm is heated. The material of the hollow ball mold is ductile iron, and the inner wall is kept at 110°C. After the lead and tin are completely melted, the liquid is poured into the hollow ball mold, and the hollow ball mold is stopped. The heating waits for its natural cooling to cool down to 20°C, and a 97mm lead-tin alloy ball is obtained after cooling.

[0064] (2) The thin handle of the lead-tin alloy ball is processed into a cylinder with a diameter of 25 mm and a diameter of 8 mm. The inner diameter of the rubber hollow ball is 117 mm....

Embodiment 3

[0068] The preparation method of the novel piezoelectric ceramic spherical shell described in Example 3 consists of the following steps:

[0069] (1) Mix 672 grams of high-purity lead and 1428 grams of high-purity tin, place it in a high-temperature furnace for heating, and when heated to 240°C, the lead-tin alloy starts to melt, and keep warm for 10 minutes after it is completely melted. At the same time, heat the hollow ball mold with an inner diameter of 31.5 mm. The material of the hollow ball mold is ductile iron, so that the inner wall is kept at 110 ° C. After the lead and tin are completely melted, pour the liquid into the hollow ball mold, and stop the hollow ball mold. The heating waits for its natural cooling to cool down to 20°C, and a 30mm lead-tin alloy ball is obtained after cooling.

[0070] (2) Process the thin handle of the lead-tin alloy ball into a cylinder with a length of 15 mm and a diameter of 8 mm. The inner diameter of the rubber hollow ball is 50 mm....

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Abstract

The invention belongs to the technical field of acoustic materials, and particularly relates to a preparation method of a novel piezoelectric ceramic spherical shell. The preparation method comprises the following steps that (1) high-purity lead and high-purity tin are mixed in proportion, then high-temperature melting is conducted, and alloy is poured into a hollow ball mold; (2) concentrically and tightly placing the lead-tin alloy balls in a rubber hollow ball mold, then pouring ceramic powder into the rubber hollow ball mold, and carrying out hydrostatic pressure molding; (3) heating the ceramic spherical shell to enable the lead-tin alloy to flow out, demolding, heating the ceramic spherical shell to 670-750 DEG C for plastic removal, and then sintering; and (4) processing the sintered ceramic spherical shell to a specified size, chambering, ultrasonically cleaning and drying to prepare the piezoelectric ceramic spherical shell. The preparation method of the novel piezoelectric ceramic spherical shell is simple in process and convenient to operate, and compared with a pouring method, the novel piezoelectric ceramic spherical shell has uniform density and higher strength.

Description

technical field [0001] The invention belongs to the technical field of acoustic materials, and in particular relates to a preparation method of a novel piezoelectric ceramic spherical shell. Background technique [0002] Piezoelectric ceramics have been widely used because of their piezoelectricity and the diversity of electromechanical properties caused by piezoelectricity. The application of piezoelectric ceramics can be roughly divided into two categories: piezoelectric vibrator and transducer. The former, such as oscillators, resonators, filters, delay lines, etc., mainly use the principle of electro-mechanical and electro-mechanical conversion; the latter, such as underwater acoustic transducers, ultrasonic transducers, etc., are mainly used for energy conversion. Some special transducers, such as underwater acoustic transducers, require piezoelectric ceramic spherical shells as piezoelectric vibrators to emit sound waves or detect sound signals. However, due to the s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B38/00
CPCC04B35/622C04B38/061C04B2235/656C04B2235/6567C04B2235/77C04B2235/94C04B2235/95C04B2235/96
Inventor 孙兆海孙启波高民曲昊晨
Owner ZIBO YUHAI ELECTRONICS CERAMIC