Unlock instant, AI-driven research and patent intelligence for your innovation.

Preparation method of lead based relaxor ferroelectric ceramic powder material with pure perovskite structure

A technology of ferroelectric ceramics and powder materials, applied in circuits, electrical components, piezoelectric/electrostrictive/magnetostrictive devices, etc., can solve the problems of high price, limited application, and difficulty in preparing ceramic powder materials. Achieve energy saving, low cost, and waste reduction

Inactive Publication Date: 2012-08-08
LIAOCHENG UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, common wet chemical methods use soluble salts as raw materials, and the soluble salts of niobium are expensive, and it is not easy to prepare ceramic powder materials in large quantities, which limits the application in industry

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation method of lead based relaxor ferroelectric ceramic powder material with pure perovskite structure
  • Preparation method of lead based relaxor ferroelectric ceramic powder material with pure perovskite structure
  • Preparation method of lead based relaxor ferroelectric ceramic powder material with pure perovskite structure

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Example 1 Pure perovskite structure Pb (Mg 1 / 3 Nb 2 / 3 )O 3 Synthesis of (PMN) lead-based relaxor ferroelectric ceramic powder

[0031] The raw materials used in the synthesis are: magnesium nitrate (Mg(NO 3 ) 2 ), niobium pentoxide (Nb 2 o 5 ), lead acetate ((CH 3 COO) 2 Pb·H 2 O). The above raw materials were weighed according to the molar ratio of 1:2:3.

[0032] Its reaction equation is:

[0033] Mg(NO 3 ) 2 +Nb 2 o 5 +3(CH 3 COO) 2 Pb·H 2 O=3Pb(Mg 1 / 3 Nb 2 / 3 )O 3 +6CO 2 ↑+3H 2 O+2NO 2 ↑

[0034] Organics use citric acid (C 6 h 8 o 7 ·H 2 O), the mol ratio of citric acid and metal ion is 2. according to figure 1 The process flow diagram shown in the synthetic preparation, calcined at 850 ° C for 2 hours, to obtain pure perovskite structure Pb (Mg 1 / 3 Nb 2 / 3 )O 3 (PMN) lead-based relaxor ferroelectric ceramic powder synthesis.

Embodiment 2

[0035] Example 2 Pure perovskite structure Pb (Mg 1 / 3 Nb 2 / 3 )O 3(PMN) lead-based relaxor ferroelectric ceramic powder is synthesized, and the difference of embodiment 1 is citric acid (C 6 h 8 o 7 ·H 2 O) from glucose (C 6 h 12 o 6 ) instead of glucose (C 6 h 12 o 6 ) to a metal ion molar ratio of 1.5.

Embodiment 3

[0036] Example 3 Pure perovskite structure Pb (Mg 1 / 3 Nb 2 / 3 )O 3 (PMN) lead-based relaxor ferroelectric ceramic powder was synthesized, and the difference from Example 1 was that the molar ratio of citric acid to metal ions was 3.0.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a lead based relaxor ferroelectric ceramic powder material with a pure perovskite structure and a preparation method thereof; oxides, nitrate, acetate and other precursors and organics are weighed according to a molar ratio of 1:1.5-3 and prepared into the lead based relaxor ferroelectric ceramic powder material with the pure perovskite structure by a two-step particle wrapping method. The preparation method can synthesize powder materials with the pure perovskite structure necessary for preparing lead based relaxor ferroelectric ceramic with excellent performance at lower temperature, which means that the prepared powder particles are relatively small and the aggregation existing in the synthetic process is soft. The lead based relaxor ferroelectric ceramic powdermaterial creates conditions for the production of lead based relaxor ferroelectric ceramic material with low cost and high performance, thus having broad application prospect in industrial production.

Description

technical field [0001] The invention belongs to the field of ceramic powder material preparation technology, in particular to a preparation method of a lead-based relaxor ferroelectric ceramic powder material with a pure perovskite structure. Background technique [0002] With the rapid development of electronic information technologies such as integrated circuits, computers, robots, surface assembly technology, precision machinery, optical systems, and automatic control, multilayer ceramic capacitors, ceramic micro-displacers, and The demand for actuators and the like is increasing day by day [Uchino K.J. Electrostrictive actuators: materials and applications. Ceram. Bull., 1986, 65(4): 647-652]. Composite perovskite structure A(B ′ B″)0 3 Ferroelectrics are an important class of relaxor ferroelectric materials, especially lead-based perovskite structures, also known as electrostrictive ceramics. Lead magnesium niobate (PMN) in the lead-based perovskite structure is a ty...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/624C04B35/495H01L41/187
Inventor 徐志军初瑞清郝继功张燕杰李伟付鹏
Owner LIAOCHENG UNIV