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Method for preparing wide-temperature zone phase change type pyroelectric ceramic material

A technology of pyroelectric ceramics and phase change, applied in the field of preparation of pyroelectric ceramic materials, can solve problems such as difficult to meet the requirements of pyroelectric devices, narrow pyroelectric peak temperature range, etc.

Inactive Publication Date: 2008-12-31
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Although the pyroelectric coefficient of PMN-PMS-PZT series materials is high at the phase transition point, the temperature range where the pyroelectric peak appears is narrow, which is difficult to meet the requirements of modern pyroelectric devices.

Method used

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  • Method for preparing wide-temperature zone phase change type pyroelectric ceramic material
  • Method for preparing wide-temperature zone phase change type pyroelectric ceramic material
  • Method for preparing wide-temperature zone phase change type pyroelectric ceramic material

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0022] According to the chemical formula Pb[(Mn 0.33 Nb 0.67 ) 0.5 (Mn .33 Sb 0.67 ) 0.5 ] 0.08 (Zr x Ti 1-x ) 0.92 o 3 [referred to as PMN-PMS-PZT(x)], will analyze pure PbO, ZrO 2 、TiO 2 , Nb 2 o 5 , Sb 2 o 3 powder and Mn(NO 3 ) 2 Two kinds of PMN-PMS-PZT powders, x=95 and x=85, are prepared in the solution according to the stoichiometric ratio in the respective chemical formulas. After ball milling, crushing and sieving respectively, they are pre-calcined at 800°C for 6 hours, and the pre-calcined synthetic The two powders are mixed uniformly, pulverized, sieved, and formed according to PMN-PMS-PZT (95): PMN-PMS-PZT (85) = 1: 2 (wherein the forming process includes preforming and cold isostatic pressing two steps), and then sintered at 1265°C for 2 hours in a double-crucible sealed atmosphere. Grind the sintered sample, clean it, coat it with silver, and burn the electrode. Then place the sample in silicone oil at 120°C and add a 3KV / mm electric field to...

example 2--3

[0024] The PMN-PMS-PZT (95) and PMN-PMS-PZT (85) powder after pre-burning are pressed according to PMN-PMS-PZT (95): PMN-PMS-PZT (85)=1: 1 and 2: 1 to mix. All the other are the same as Example 1, and the process parameters are shown in Table 2. Its performance is shown in Table 3.

example 4-5

[0026] Mix the pre-fired PMN-PMS-PZT (95) and PMN-PMS-PZT (85) powders according to PMN-PMS-PZT (95): PMN-PMS-PZT (85) = 1:2, and sinter The temperatures were 1200°C and 1300°C, respectively. The material after firing the electrode is polarized in silicone oil at 100-120°C with a voltage of 3-5KV / mm for 15-20 minutes, and then cooled to room temperature under pressure. All the other are the same as Example 1, and the process parameters are shown in Table 2. Its performance is shown in Table 3.

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Abstract

The invention discloses a preparation method for wide-temperature-range phase-transition pyroelectric ceramic materials, comprising the following steps: (1) based on the chemical formula Pb((Mn0.33Nb0.67) 0.5 (Mn0.33Sb0.67) 0.5)0.08 (ZrxTi1-x) 0.92O3, x stands for the molar fraction ratio between Zr and Ti and is greater than or equal to 0.80 but less than or equal to 0.98; selecting two different values in the value range of x; mixing PbO, ZrO2, TiO2, Nb2O5, Sb2O3 powder and Mn (NO3)2 based on the stoichiometric proportion in the respective chemical formula so as to get two mixtures; (2) insulating the two mixtures respectively for 4 to 6 hours at 800-900 DEG C to get pre-burning powder; (3) taking the pre-burning powder as base material and mixing the base material according to mass ratio of 1:2 to 2:1; molding the powder and insulating the powder for 2 to 3 hours at 1250-1300 DEG C for sintering; (4) grinding and washing the sintered material, then arranging and burning the electrodes; (5) after electrode burning, polarizing the material, and then retaining the voltage and cooling the material to room temperature. The mixed PMN-PMS-PZT pyroelectric ceramic prepared in the invention has high pyroelectric coefficient and good integrated pyroelectric performance in a wider temperature range, and is in line with the requirements of pyroelectric infrared detector production.

Description

technical field [0001] The present invention belongs to the preparation method of pyroelectric ceramic material, specifically, it relates to the preparation of high-performance lead niobate manganate-antimony manganate-lead zirconate titanate (PMN-PMS-PZT) pyroelectric ceramic material in wide temperature range method. Background technique [0002] Among various materials, pyroelectric ceramic materials have a series of advantages such as simple manufacturing process, low cost, stable and reliable performance, easy processing, good mechanical properties, and high electric strength, making them suitable for high temperature, large area, large batch, The use under high power and harsh environment conditions shows its superiority. At present, conventional ceramics are mainly used in commercial production. This ceramic is usually a lead zirconate titanate (PZT) ternary system. The material is characterized by a large pyroelectric coefficient and a high pyroelectric figure of me...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/49C04B35/622
Inventor 张洋洋姜胜林曾亦可张光祖谢甜甜卢琳
Owner HUAZHONG UNIV OF SCI & TECH
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