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Pb (Ni1/3 Nb2/3) O3-Pb (Zr, Ti) O3 ceramic powder sintered under low temperature and fabrication method thereof

A ceramic powder, low-temperature sintering technology, applied in piezoelectric/electrostrictive/magnetostrictive devices, circuits, electrical components, etc., can solve the problems of high powder cost, reduced sintering temperature, and reduced material properties. Excellent ferroelectric properties, lower sintering temperature, good repeatability

Active Publication Date: 2010-08-18
江苏先进无机材料研究院
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Problems solved by technology

[0004] There are two main methods to reduce the sintering temperature of ceramics. One is to prepare ceramic powder by chemical method, which reduces its particle size and improves its activity. However, the cost of preparing powder by chemical method is high and it is not suitable for large-scale industrial production. One method is to add a low-melting sintering aid to the powder to form a liquid phase during the sintering process to promote the diffusion of elements and the densification of ceramics. This method is a more commonly used method in industrial production to reduce the sintering temperature
Japanese scholar Hayashi et al. adopted LiBiO 2 The low-temperature sintering of PNN-PZT ceramics was studied as a sintering aid, and it was found that although LiBiO 2 It can reduce the sintering temperature of the material, but the performance of the material is obviously reduced after sintering at low temperature, so its low temperature sintering is of little significance
Chinese researcher Li Longtu and others used CdO as a sintering aid to prepare PNN-PT ceramics. Although the sintering temperature of the material has been significantly reduced, and the material has good piezoelectric properties, but because CdO is highly toxic, it still exists in industrial production. many problems

Method used

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  • Pb (Ni1/3 Nb2/3) O3-Pb (Zr, Ti) O3 ceramic powder sintered under low temperature and fabrication method thereof
  • Pb (Ni1/3 Nb2/3) O3-Pb (Zr, Ti) O3 ceramic powder sintered under low temperature and fabrication method thereof
  • Pb (Ni1/3 Nb2/3) O3-Pb (Zr, Ti) O3 ceramic powder sintered under low temperature and fabrication method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment 1: Pb(Ni 1 / 3 Nb 2 / 3 ) 0.30 (Zr 0.443 Ti 0.557 ) 0.70 o 3 +1%wt LiBiO 2 +0.08% wt CuO

[0028] (1) First use industrial raw material Pb 3 o 4 , NiO, Nb 2 o 5 , ZrO 2 、TiO 2 According to the above chemical formula ingredients, mixed by ball mill for 4 hours, the powder was fully dried and synthesized at 800°C for 2 hours, and then ball milled again for 6 hours to obtain PNN-PZT ceramic powder;

[0029] (2) Using analytically pure Li 2 CO 3 、 Bi 2 o 3 , CuO raw material, according to the above-mentioned chemical composition ingredients, mixed by ball mill for 4 hours and then dried to obtain low-temperature sintered PNN-PZT ceramic powder;

[0030] (3) The above-mentioned low-temperature sintered PNN-PZT ceramic powder is added with 8% binder containing 5% PVB, formed by dry pressing, and sintered at 950°C to obtain ceramics with good piezoelectric properties.

[0031] The electrical properties of the piezoelectric ceramics prepared above are s...

Embodiment 2

[0035] Embodiment 2: Pb(Ni 1 / 3 Nb 2 / 3 ) 0.30 (Zr 0.443 Ti 0.557 ) 0.70 o 3 +1%wt Ba(Cu 0.5 W 0.5 )O 3 +0.5%wtLiBiO 2 +0.08% wt CuO

[0036] (1) First use industrial raw material Pb 3 o 4 , NiO, Nb 2 o 5 , ZrO 2 、TiO 2 According to the above chemical formula ingredients, mixed by ball mill for 4 hours, the powder was fully dried and synthesized at 800°C for 2 hours, and then ball milled again for 6 hours to obtain PNN-PZT ceramic powder;

[0037] (2) Use analytically pure raw material BaCO 3 , CuO and W 2 o 3 According to the chemical formula Ba(Cu 0.5 W 0.5 )O 3 The ingredients were mixed by ball milling for 4 hours, synthesized at 650°C for 2 hours, and the synthesized powder was ball milled again for 4 hours to obtain Ba(Cu 0.5 W 0.5 )O 3 Powder;

[0038] (3) Using PNN-PZT ceramic powder, Ba(Cu 0.5 W 0.5 )O 3 Powder, Analytical Pure Li 2 CO 3 、 Bi 2 o 3 , CuO is mixed according to the above chemical composition, mixed by ball mill for 4 hours ...

Embodiment 3

[0043] Embodiment 3: Pb(Ni 1 / 3 Nb 2 / 3 ) 0.20 (Zr 0.7 Ti 0.3 ) 0.80 o 3 +2%wtBa(Cu 0.5 W 0.5 )O 3 +0.05%wtCuO

[0044] (1) First use industrial raw material Pb 3 o 4 , NiO, Nb 2 o 5 , ZrO 2 、TiO 2 According to the above chemical formula ingredients, mixed by ball mill for 4 hours, the powder was fully dried and synthesized at 800°C for 2 hours, and then ball milled again for 6 hours to obtain PNN-PZT ceramic powder;

[0045] (2) Use analytically pure raw material BaCO 3 , CuO and W 2 o 3 According to the chemical formula Ba(Cu 0.5 W 0.5 )O 3 The ingredients were mixed by ball milling for 4 hours, synthesized at 650°C for 2 hours, and the synthesized powder was ball milled again for 4 hours to obtain Ba(Cu 0.5 W 0.5 )O 3 Powder;

[0046] (3) Using PNN-PZT ceramic powder, Ba(Cu 0.5 W 0.5 )O 3 The powder and CuO are mixed according to the above chemical composition, mixed by ball mill for 4 hours and then dried to obtain low-temperature sintered PNN-PZT ...

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Abstract

The invention belongs to the field of new inorganic material preparation and technical study, in particular relates to the low-temperature sintering formulation of a high-performance piezoelectric ceramics and the technology thereof. By adding the sintering auxiliary combination of Ba (CU 0.5w 0.5) O3, LiBiO2 and CuO, and adopting the common solid-phase combinatorial synthesis, the method of the invention can prepare ceramics Pb (Ni1 / 3 Nb2 / 3) O3-Pb (Zr, Ti) O3. The ceramics can be sintered under the temperature as low as 950 DEG C. The ceramics also boost a sound ferro-voltage electrical property. The key steps of the technical scheme are: synthesizing Pb (Ni1 / 3 Nb2 / 3) O3-Pb (Zr, Ti) O3 ceramic powders using Pb3O4, NiO, Nb2O5, TiO2, ZrO2 as ingredients, sintering the ceramic powders into ceramics under different temperatures with additives of Ba (CU 0.5w 0.5) O3, LiBiO2 and CuO. By adding low-melting point sintering auxiliary combination, the sintering temperature can be lowered to 950 DEG C, and the property of the ceramics sintered under low temperature is enhanced.

Description

technical field [0001] The invention belongs to the research field of preparation of novel inorganic materials, in particular to a low-temperature sintered Pb(Ni 1 / 3 Nb 2 / 3 )O 3 -Pb(Zr,Ti)O 3 Ceramic powder and its preparation. Background technique [0002] Piezoelectric ceramics are a class of information functional materials that can realize force-electric conversion, and are widely used in many fields such as drives and sensors. The widely used piezoelectric ceramics include: lead zirconate titanate-based piezoelectric ceramics PZT and lead-based composite perovskite piezoelectric ceramics, such as Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -PbTiO 3 (PMN-PT), Pb(Zn 1 / 3 Nb 2 / 3 )O 3 -PbTiO 3 (PZN-PT) and so on. For optimum performance, these materials are sintered at temperatures between 1150°C and 1300°C. [0003] Pb(Ni 1 / 3 Nb 2 / 3 )O 3 -Pb(Zr,Ti)O 3 ((referred to as PNN-PZT) is another typical piezoelectric material with composite perovskite structure. Because of its good piez...

Claims

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Application Information

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IPC IPC(8): C04B35/493C04B35/495C04B35/626C04B35/622C04B35/63H01L41/187
Inventor 曾江涛李国荣郑嘹赢殷庆瑞
Owner 江苏先进无机材料研究院
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