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Neodymium ytterbium manganese co-doped type bismuth rubidium niobate piezoelectric ceramic material and preparation method thereof

A piezoelectric ceramic and co-doping technology, applied in the field of piezoelectric ceramic materials, can solve the problems that the piezoelectric performance cannot meet the application requirements and the piezoelectric constant is low, and achieve good polarization effect, high Curie temperature, and promote deformation. Effect

Inactive Publication Date: 2019-05-17
赵娟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the piezoelectric constants of bismuth layered piezoelectric ceramic materials are generally low, such as the piezoelectric constant of bismuth sodium titanate is only 16 pC / N, when used at higher temperatures, its piezoelectric performance cannot meet the application Require

Method used

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Examples

Experimental program
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Effect test

preparation example Construction

[0033] The present invention also provides a preparation method of neodymium, ytterbium and manganese co-doped bismuth and rubidium niobate piezoelectric ceramic materials, comprising the following steps:

[0034] (1) Select analytically pure or superior pure Bi 2 o 3 , Rb 2 CO 3 , Nb 2 o 5 、Nd 2 o 3 , Yb 2 o 3 and MnO, according to Bi 2.5 Rb 3.5 Nb 5-x (NdYbMn) 5x / 8 o 18 Calculate the mass of each raw material required by the general chemical formula, and accurately weigh it for future use, where the value of x is selected from any value between 0.1 and 0.3;

[0035] (2) Place the weighed raw materials in a planetary ball mill. The ball milling medium is anhydrous ethanol and zirconia balls. Ball milling is carried out at a rate of 280-320 rpm. The ball milling time is 14-18 hours. After the ball milling is completed, place the obtained ball milling mixture in a drying tray, and dry it at 80-90°C to constant weight;

[0036] (3) Press the dry material obtained ...

Embodiment 1

[0048] The preparation formula is Bi 2.5 Rb 3.5 Nb 4.85 (NdYbMn) 0.09375 o 18 The neodymium ytterbium manganese co-doped bismuth rubidium niobate piezoelectric ceramic material.

[0049] Choose analytically pure or superior pure Bi 2 o 3 , Rb 2 CO 3 , Nb 2 o 5 、Nd 2 o 3 , Yb 2 o 3 and MnO, according to Bi 2.5 Rb 3.5 Nb 4.85 (NdYbMn) 0.09375 o 18 Calculate the mass of each raw material required by the general chemical formula, and weigh it accurately, and set aside; place each raw material weighed in a planetary ball mill, and the ball milling medium is absolute ethanol and zirconia grinding balls, according to 300 rpm The speed of ball milling is 10 minutes, and the ball milling time is 16 hours. After the ball milling is completed, the obtained ball milling mixture is placed in a drying tray, and dried at 85°C to constant weight; the dried material obtained after drying is pressed, pressed Form a rough billet with a diameter of 25 mm and a thickness of 5 mm...

Embodiment 2

[0051] The preparation formula is Bi 2.5 Rb 3.5 Nb 4.8 (NdYbMn) 0.125 o 18 The neodymium ytterbium manganese co-doped bismuth rubidium niobate piezoelectric ceramic material.

[0052] Choose analytically pure or superior pure Bi 2 o 3 , Rb 2 CO 3 , Nb 2 o 5 、Nd 2 o 3 , Yb 2 o 3 and MnO, according to Bi 2.5 Rb 3.5 Nb 4.8 (NdYbMn) 0.125 o 18 Calculate the mass of each raw material required by the general chemical formula, and weigh it accurately, and set aside; place each raw material weighed in a planetary ball mill, and the ball milling medium is absolute ethanol and zirconia grinding balls, according to 300 rpm The speed of ball milling is 10 minutes, and the ball milling time is 16 hours. After the ball milling is completed, the obtained ball milling mixture is placed in a drying tray, and dried at 85°C to constant weight; the dried material obtained after drying is pressed, pressed Form a rough billet with a diameter of 25 mm and a thickness of 5 mm, then...

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Abstract

The invention discloses a neodymium ytterbium manganese co-doped type bismuth rubidium niobate piezoelectric ceramic material and a preparation method thereof. The neodymium ytterbium manganese co-doped type bismuth rubidium niobate piezoelectric ceramic material has the following chemical general formula: Bi2.5Rb3.5Nb5-x(NdYbMn)5x / 8O18, wherein the numerical value of x is an any numerical value selected from 0.1 to 0.3. The preparation method of the neodymium ytterbium manganese co-doped type bismuth rubidium niobate piezoelectric ceramic material comprises the following technological steps:weighing raw materials, carrying out ball milling, pressing, pre-firing, carrying out secondary ball milling, granulating, degumming, firing and the like. After the neodymium ytterbium manganese co-doped type bismuth rubidium niobate piezoelectric ceramic material disclosed by the invention is tested, the piezoelectric constant is 39.6 to 42.3 pC / N, the Curie temperature is 628 to 656 DEG C, and the mechanical quality factor, the radial electro-mechanical coupling factor and the dielectric loss are remarkably improved; the neodymium ytterbium manganese co-doped type bismuth rubidium niobate piezoelectric ceramic material has a good application prospect in the high-temperature field. A ceramic component prepared from the material can be assembled into various high-temperature sensors and has a relatively good application prospect in the aspects of high temperature measurement and detection, and automatic control.

Description

technical field [0001] The invention belongs to the field of piezoelectric ceramic materials, in particular to a neodymium, ytterbium and manganese co-doped bismuth-rubidium niobate piezoelectric ceramic material and a preparation method thereof. Background technique [0002] Piezoelectric ceramics are a class of electronic ceramic materials with piezoelectric properties. The main difference between them and typical piezoelectric quartz crystals that do not contain ferroelectric components is that the crystal phases that constitute their main components are all ferroelectric crystal grains. . Since ceramics are polycrystalline aggregates with randomly oriented grains, the spontaneous polarization vectors of individual ferroelectric grains are also chaotically oriented. In order for the ceramics to exhibit macroscopic piezoelectric properties, it is necessary to place the piezoelectric ceramics under a strong DC electric field for polarization treatment after they are fire...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/622
Inventor 赵娟徐丽霞
Owner 赵娟
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