SU1330117A1 - Piezoelectric ceramic material - Google Patents

Abstract

The invention relates to the field of piezoelectric ceramic materials and can be used in electronic technology for the manufacture of electromechanical transducers operating in a receive mode. The goal is to reduce the dielectric constant and increase the Curie temperature. In order to achieve the goal, the components are included in the composition of the material in the following ratio, wt.%: PHO 53.09 - 67.84; TiOj 18.91-24.16; 5.55 - 19.42; ZnO 0.97 - 3.41 and 1.48-5.17. The material obtained by the two-stage technology has the following characteristics: Curie temperature up to T, 497 - 547 C; dielectric constant 6j3 90-208; values, piezomodul d 33 64-150-C / H and specific piezo-sensitivity 0.3-1.45. 2 tab. (L 00 her

Description

This invention relates to synthetic piezo ceramic materials and can be used in; electronic technology for the manufacture of electromechanical transducers based on the phenomenon of piezoelectricity operating in receive mode.

The purpose of the invention is to reduce the dielectric constant and increase the Curie temperature.

Table 1 shows the compositions of piezoceramic materials.

The raw material for obtaining the specified material is sludge ch.d. a, oxides. The grinding and mixing of the composittop mixtures are carried out in an agate ball mill in an isopropyl alcohol medium. From the prepared mixture under

briquettes are pressed with a specific pressure of 200 kg / cm and synthesized at 770 ,. C for 3 hours. The synthesized briquettes are crushed and pressed into articles of a given shape, then burned at a temperature (1000-1140 ° C), optimal for each composition, for 1 hour.

Cooling to room temperature lead in the off mode of the furnace.

 The electrodes are applied by firing silver paste at 800 ° C for 30 minutes.

Composition

PYo

B1,, 0,, I ZnOZrO.,

67.84 24.16 5.550.97 1.48

51, 94 22.06 P JC1, 95 2.93 53.09 18.91, 4.1 5j: /

The polarization of the products is carried out in a poly-hexane fluid at 150 ° C and an electric field strength of 20 kV / cm. Cooling samples to room temperature are under the field.

The electrophysical characteristics of the material are determined on samples with a diameter of 10 mm and a thickness of 1 mm.

The results of the study of the properties of the obtained epials are shown in Table 2.

Formulas

the invention

 -i tl and h and the piezoelectric ceramic material; including PbO, TiU Bi ,,,, ZrO and ZnO, oi y and 5, in order to reduce the dielectric constant and increase the Curie temperature, it contains the components in the following ratio, wt.%

and

53.09-57.84.

18.91-24.6 5.55-19.42 1.48-5, 17 0.97-3.41

Table 2

Claims (1)

Claim Piezoelectric tertiary ceramic material, including PbO, Τί. _{2 2} , Bi ₂ 0 _{? S} ZrO _g and ZnO, with the fact that, in order to reduce the dielectric constant and increase the Curie temperature , it contains' components in the following ratio, wt.% Rio 53.09-57.84 TiO ₂ 18.91-24.16 WCO _E 5.55-19.42 Zroy 1.48-5.17 Zno 0.97-3.41 Composition The content of oxides, wt.% Zno Zr0 ₂ 67.84 0.97 1, 95 s 53.09 Table 2 208 0.38 1040 Famous 1050-1100 940 0.005 325 VNIIIPI Order 3536/25 Circulation 587 __Subscription Custom polygr. ave, city of Uzhhorod, st. Project., 4