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Low-frequency-constant modified lead metaniobate piezoelectric ceramic material as well as preparation method and application thereof

A piezoelectric ceramic and lead metaniobate technology, applied in the field of ceramic composition and preparation, can solve problems such as unreported, and achieve the effect of improving piezoelectric activity and stability

Active Publication Date: 2013-03-20
SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, no such transducer has been found in China, and the corresponding low frequency constant modified lead metaniobate piezoelectric ceramic material has not been reported in China.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] with Pb 3 o 4 (industrial pure), TiO 2 (industrial pure), SrCO 3 (industrial pure), Nb 2 o 5 (industrial pure), Ta 2 o 5 (chemically pure), Sc 2 o 3 (chemically pure), Bi 2 o 3 (high purity), La 2 o 3 (chemically pure), SiO 2 (chemically pure), CeO 2 (chemically pure) as raw material, according to the formula 0.98Pb 0.66 La 0.02 Sr 0.32 Nb 2 o 6 +0.02(0.64PbTiO 3 +0.36BiScO)+0.1wt%CeO 2 +0.1wt%SiO 2 +0.02wt%Ta 2 o 5 Stoichiometric weighing, with deionized water and agate balls as the medium, after barrel milling for 8 hours, after the discharge and drying, the first open powder synthesis was carried out at 1000 ° C for 2 hours, and then the first open powder synthesis was carried out at 1280 ° C for 2 hours. Secondary open powder synthesis, followed by drum milling for 24 hours, discharge drying, adding binder, molding (molding pressure 150MPa), plastic discharge (800°C, 1h), sintering (1300°C, 2h), cold processing, Ultrasonic cleaning, upper ele...

Embodiment 2

[0040] with Pb 3 o 4 (industrial pure), TiO 2 (industrial pure), SrCO 3 (industrial pure), Nb 2 o 5 (industrial pure), Ta 2 o 5 (chemically pure), Sc 2 o 3 (chemically pure), Bi 2 o 3 (high purity), La 2 o 3 (chemically pure), SiO 2 (chemically pure), CeO 2 (chemically pure) is raw material, and the preparation technology of its piezoelectric ceramic material is the same as above-mentioned embodiment 1, by 0.98Pb 0.65 La 0.03 Sr 0.32 Nb 2 o 6 +0.02(0.64PbTiO 3 +0.36BiScO 3 )+0.1wt%CeO 2 +0.1wt%SiO 2 +0.02wt%Ta 2 o 5 The stoichiometric weighing, the main performance of the material standard sheet is: dielectric constant ε 33 T / ε 0 =608, tanδ=0.50%, T c =393°C, d 33 =161pC / N, Kt=0.41, Nt=1354.

Embodiment 3

[0042] with Pb 3 o 4 (industrial pure), TiO 2 (industrial pure), SrCO 3 (industrial pure), Nb 2 o 5 (industrial pure), Ta 2 o 5 (chemically pure), Sc 2 o 3 (chemically pure), Bi 2 o 3 (high purity), La 2 o 3 (chemically pure), SiO 2 (chemically pure), CeO 2 (chemically pure) is raw material, and the preparation technology of its piezoelectric ceramic material is the same as above-mentioned embodiment 1, by 0.98Pb 0.64 La 0.03 Sr 0.33 Nb 2 o 6 +0.02(0.64PbTiO 3 +0.36BiScO 3 )+0.1wt%CeO 2 +0.1wt%SiO 2 +0.02wt%Ta 2 o 5 The stoichiometric weighing, the main performance of the material standard sheet is: dielectric constant ε 33 T / ε 0 =620, tanδ=0.48%, T c =389°C, d 33 =165pC / N, Kt=0.42, Nt=1350.

[0043] Industrial applicability: the material of the present invention has the characteristics of single resonance frequency, high sensitivity, wide received signal amplitude and good stability, and can be applied to the preparation of ultrasonic transducers...

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Abstract

The invention relates to a low-frequency-constant modified lead metaniobate piezoelectric ceramic material as well as a preparation method and an application thereof. The low-frequency-constant modified lead metaniobate piezoelectric ceramic material has the chemical composition of xPb1-m-n(Lam.Sr)Nb2O6+y(y1PbTiO3+y2BiScO3)+pwt%CeO2+qwt%SiO2+uwt%Ta2O5, wherein x is more than or equal to 0.001 and is less than or equal to 1, y is more than or equal to 0.001 and is less than or equal to 1, x+y is equal to 1, m+n is more than or equal to 0.01 and is less than or equal to 0.5, p is more than or equal to 0.001 and is less than or equal to 2, q is more than or equal to 0.001 and is less than or equal to 2, u is more than or equal to 0.001 and is less than or equal to 2, y1 is more than or equal to 0.6 and is less than or equal to 0.7, y2 is more than or equal to 0.3 and is less than or equal to 0.4 and y1+y2 is equal to 1. The material has the characteristics of single resonant frequency, high sensitivity, wide extent of receiving signals and good stability, and can be applied to preparing a bone mineral density ultrasonic energy converter.

Description

technical field [0001] The invention mainly relates to a low frequency constant modified lead metaniobate piezoelectric ceramic material and its preparation method and application, belonging to the field of ceramic composition and preparation. Background technique [0002] At present, about 200 million people in the world suffer from osteoporosis, and its incidence rate ranks seventh among various common diseases. At present, there are 143 million elderly people over 60 years old and nearly 100 million osteoporosis patients in China. Among the elderly over 60 years old in Shanghai, the incidence rate of osteoporosis is 75.5% for women and 24.9% for men, and the incidence of osteoporosis in people over 60 years old is about 50%. Osteoporosis has become a serious health problem in an aging society. Ultrasonography, as a safe, convenient and accurate method for detecting bone density, is of great significance for early diagnosis of osteoporosis, prediction of fracture risk an...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/499C04B35/472C04B35/622H10N30/853
Inventor 李玉臣董显林姚烈
Owner SHANGHAI INST OF CERAMIC CHEM & TECH CHINESE ACAD OF SCI