SU1271852A1 - Piezoelectric ceramic material - Google Patents

Abstract

The invention can be used in radio engineering as high-frequency transducers, electromechanical filters, sensors, ultrasonic vibrators. In order to improve piezoelectric properties, increase mechanical strength and reduce sintering temperature, the piezoelectric ceramic material contains glass of composition, wt.Х: РЬО 62,12; ZrO ,, 7.79; TU, 10.11; SiO, 7.61; 12.37 and lead-strontium titanate zirconate solid solution With S f (Pb ,, 8g ,,,) (Zr ,,,. Ti ,,,) OJ. G 0,99 () 0,01 at the following (L ratio of components, wt.%; Glass I-2; solid solution 98-99. Table 2.

Description

The invention relates to materials used in sonar, in ultrasonic technology, and can be used in highly sensitive electro-acoustic receivers.

The purpose of the invention is the improvement of piezoelectric properties, increase mechanical strength and lower sintering temperature.

The manufacturing technology of the proposed piezoceramics is as follows. The oxides La ₂ O ₃ , PbO, Ti0 ₂ , Zr0 ₂ , SrO and Nb ₂ 0 _ff of the analytical grade are mixed in a jasper drum for 24 hours. Then the mixture of oxides is dried and pressed under pressure of 700 kg / cm * 'into briquettes d = 30 mm, t = .3-5 mm and synthesized at 850¾4 hours. The synthesized ceramics are also ground in a jasper mill in isopropyl alcohol for 24 hours.

Glass is melted at 1230 ° C, then it is fritted and ground in a jasper mill for 20 hours. The ground glass is added to the synthesized ceramic during grinding.

The crushed and dried material is pressed into discs d = 12 mm, t = 2 mm. Sintering temperature depends on the concentration of glass and varies within 1120-G200 ° C. Exposure is 1 hour. Then the samples are subjected to additional annealing at 900 ° C to relieve internal mechanical stresses. The polarization of the samples is carried out at 150 C and a tension of 45 kV / mm in polysilicon oil.

Example. To glass composition, wt.%: РЬО 62,12; Zr0 ₄ 7.79; TU ₂ 10.11; La ₂ 0 ₃ 12.37; Si0 ₄ 7.61, 1-2 wt.% Ceramic of the following composition is added [(Pb0 _{o <s5} Sr <,; _os ) (Ζι% _ι56 Νί _έ44 ) 0 _s ], 0.99. . (pi ₂ 0 ₃ ) .0.01.

a

The composition of the piezoelectric ceramic material is given in table. 1.

Material properties are given in table. 2.

The proposed material can be used as piezoelectric ultrasonic delay lines of color television receivers, as well as in the manufacture of electro-acoustic transducers for measuring the speed of wave propagation in materials. This expands the scope of application in the national economy for the manufacture and development of construction materials, since ultra-: sound methods are widely used to control the quality of materials.

Claims (2)

The invention relates to materials used in hydroacoustics, in ultrasonic technology, and can be used in highly sensitive electroacoustic receivers. The purpose of the invention is to improve the piezoelectric properties, increase the mechanical strength and reduce the sintering temperature. The manufacturing techniques of pre-paz piezo ceramics are as follows. Oxides, PbO, TiO, ZrO, SrO and grade h, dA, are mixed in a drum for 24 hours. Then the mixture of oxides is dried, pressed under a pressure of 700 kg / cm in briquettes d 30 mm, t. 3-5 mm and synthesized at 4 hours. Grinding of the synthesized ceramics is also carried out in a shmovaya mill in an environment of isopropyl alcohol for 24 hours. Glass melting is carried out at 1230 ° C, then it is fritted and crushed in a shmm mill for 20 hours. ceramics when grinding. The crushed and dried material is pressed into disks d 12 mm, t 2 mm. The sintering temperature depends on the concentration of glass and varies in the range of 1120-G200 ° C. A 1 h exposure. Then the samples are subjected to additional annealing at 900 ° C to relieve internal mechanical stresses. The samples were polarized at 150 ° C and 45 kV / mm in polysilicone oil. Example. To the glass composition, wt.%: PBO 62,12; ZrO 7.79; TiO, j 10.11; 12.37; .Si04 7.61, added in an amount; 1-2 wt.% Of the ceramic of the following composition (PbOogg Sr,; oB) (Zr.b, 5, Nib 4.) 0.1.0,99. . (te ,,, 0з) .0,01. The composition of the piezoelectric ceramic material is given in table. 1. The properties of the material aa are given in table. 2. The proposed material can be used as piezo formers of ultrasonic delay lines of color television receivers, as well as in the manufacture of electroacoustic transducers for measuring the speed of wave propagation in materials. This broadens the field of implementation in the national economy in the manufacture and development of design materials, since ultra-: sound methods are widely used to control the quality of materials. The invention of a piezoelectric ceramic material comprising a solid solution of lead-strontium zirconate titanate with the addition of Kb. O and PbO, ZrO,, TiO, SiO based glass, characterized in that, in order to improve the piezoelectric properties, increase mechanical strength and reduce sintering temperature, the solid solution has the composition) (, S6 T1, "OOz1-0.99. (Kb505) 0,01T and glass additionally contains and has the composition, wt.%: 62.12 7.79 10.11 7.61 12, 37 in the following ratio of components. May.%:. ..SVS) (2Го, 5bТ1о 4). .0,99. (1Pe, 05) .0.01 Glass Table 2 Note. P is the density; - electrical permeability; tg $ is the dielectric loss; d, piezoemobile; O - mechanical quality; 6 -mechanical strength; K is an electromechanical coupling coefficient.