Claims
- 1. A process for preparing a device comprising the following steps:
- (a) a distributing ceramic granules in a polymer matrix, amount of the granules is 10-50%, based on the combined weight of the granules and the matrix, porosity of the granules is below 10%, the granules are prepared by mixing powder with more than 60% by weight of a binder to form an intermediate product which is heat treated to produce the granules, the granules have average particle size of about 100-200 microns, and the granules contain crysatllites which have piezoelectric property and an average diameter exceeding 5 microns; and
- (b) applying electrodes to opposite sides of the matrix.
- 2. The process of claim 1 wherein connectivity of the matrix is in the x, y and z planes; the polymer matrix is selected from the group consisting of silicone rubbers, epoxy resins, acrylic resins, neoprene and mixtures thereof; crystallites in the granules are 8-20 microns in average diameter; and the connectivity of the granules in the device is either zero or 1.
- 3. The process of claim 2 wherein d.sub.33 of the device is 65-100 pC/N when operating in the 1-3 mode.
Parent Case Info
This application is a division of application Ser. No. 08/558,313, filed Nov. 15, 1995, (status, pending etc).
US Referenced Citations (7)
Divisions (1)
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Number |
Date |
Country |
Parent |
558313 |
Nov 1995 |
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