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Method for preparing piezoelectric ceramic ball shell

A technique of piezoelectric ceramics and a manufacturing method, which is applied in the field of bonding piezoelectric ceramic hemispherical shells into piezoelectric ceramic spherical shells, can solve problems such as uneven wall thickness of spherical shells, and achieve a good symmetry effect

Active Publication Date: 2008-11-12
中船重工海声科技有限公司
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Problems solved by technology

However, due to the high-temperature sintering deformation under the action of gravity, the wall thickness of the spherical shell is uneven, especially for piezoelectric ceramic spherical shells with an outer diameter of 35mm or more. As the outer diameter increases, the sintering deformation also increases, to The unevenness of the wall thickness of the spherical shell is more serious, so the piezoelectric ceramic spherical shell with an outer diameter greater than 35mm and a wall thickness unevenness less than 0.05mm cannot be made by the high-temperature sintering method of the whole spherical shell

Method used

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  • Method for preparing piezoelectric ceramic ball shell
  • Method for preparing piezoelectric ceramic ball shell
  • Method for preparing piezoelectric ceramic ball shell

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Embodiment Construction

[0014] As an example, for SR 外 =35mm; the manufacturing method of the piezoelectric ceramic spherical shell with wall thickness t=3mm is as follows:

[0015] (1) Select the CB1125-98 piezoelectric ceramic powder that has been batched, pre-fired, and finely ground, and dried for subsequent use;

[0016] (2) The piezoelectric ceramic powder 1 is installed between the hydrostatically formed metal inner core 2 and the polyvinyl chloride elastic mold 3, and the piezoelectric ceramic powder is divided into two hemispherical shells from the middle by a paper separation ring 4;

[0017] (3) Wrap several layers of high-density polyethylene food fresh-keeping bags outside the polyvinyl chloride elastic mold equipped with piezoelectric ceramic powder and seal them, put them into the oil medium of the hydrostatic pressure forming container, and form them with a pressure of 200 MPa;

[0018] (4) After forming, the hemispherical shell is sintered at a temperature of 1300-1350°C to make a h...

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Abstract

The invention relates to a piezoelectric ceramic spherical shell manufacturing method that includes the following main steps: taking mixing, preburning, and fine grinding processes; molding to radius shell and sintering to slug, grinding to regulated size and taking burning electrode, high voltage polarization process, forming entire spherical shell using epoxide-resin glue to gain piezoelectric ceramic spherical shell. The invention ensures the error below 0.05. thus, the spherical shell would have good symmetry in three dimensional space.

Description

technical field [0001] The invention relates to a manufacturing method of a piezoelectric ceramic spherical shell, in particular to a method for bonding two piezoelectric ceramic hemispherical shells obtained by machining inner and outer spherical surfaces by a mechanical grinding method to form a piezoelectric ceramic spherical shell. Background technique [0002] In the prior art, a piezoelectric ceramic spherical shell with an outer diameter of less than 35 mm is manufactured by sintering the entire spherical shell at a high temperature of 1300-1350°C. However, due to the high-temperature sintering deformation under the action of gravity, the wall thickness of the spherical shell is uneven, especially for piezoelectric ceramic spherical shells with an outer diameter of 35mm or more. As the outer diameter increases, the sintering deformation also increases, to The unevenness of the wall thickness of the spherical shell becomes more serious. Therefore, the high-temperature ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B33/00B24B11/02C04B41/80C04B111/90
Inventor 潘学蕃赵吉贤王新平刘海洋
Owner 中船重工海声科技有限公司
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