Rod-like niobium pentoxide template grain and preparation method thereof

A technology of niobium pentoxide and crystal grains, which is applied in the field of rod-shaped niobium pentoxide template grains and its preparation, which can solve the problems of unsuitable nanorods and achieve the effect of improving piezoelectric performance and simple preparation process

Active Publication Date: 2013-12-18
江苏先进无机材料研究院
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, nanorods are not suitable as templates in templated grain growth techniques

Method used

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  • Rod-like niobium pentoxide template grain and preparation method thereof
  • Rod-like niobium pentoxide template grain and preparation method thereof
  • Rod-like niobium pentoxide template grain and preparation method thereof

Examples

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preparation example Construction

[0032] As an example, specifically, the preparation method of the present invention may include the following steps.

[0033] (1) Weigh Nb according to the ratio of raw material and molten salt 1:1~10 (mass ratio) 2 O 5 And soluble sodium salt powder, pour ethanol into it, and use ZrO 2 Balls, steel balls, or agate balls are used as media and mixed in a ball mill for 1 to 3 hours. Wherein, the soluble sodium salt may be at least one of sodium chloride, sodium nitrate, sodium sulfate and sodium carbonate. The ball mill may be, for example, a planetary ball mill. Preferably, before weighing the raw material powder, it can be baked at 100°C to 150°C for more than 3 hours to obtain a dry raw material powder.

[0034] (2) Heat and dry the raw materials after ball milling, and put them into a closed crucible for synthesis: put the crucible with powder into a heating device such as a muffle furnace, and quickly heat up to 1000 at a rate of 5-10°C / min ~1100℃, after incubation for 40~80, ...

Embodiment 1

[0039] ① Ingredients ball mill: Weigh AR grade Nb 2 O s (99.96%) 40.1263g, AR grade NaCl (99.80%) 40.1266g, add a certain amount (depending on the fluidity of the slurry) of absolute ethanol, and use ZrO in a planetary ball mill 2 The balls are mixed with the medium for 2 hours, and the mixed slurry is dried in an oven at 80℃;

[0040] ②Molten salt reaction: The dried powder is put into an alumina crucible with a cover, and put into a muffle furnace for synthesis. The synthesis conditions are 1050℃, the temperature is kept for 60min, the heating rate is 5℃ / min, and the cooling rate is 5℃ / min after the completion of the heat preservation;

[0041] ③Washing and drying: Put the reacted powder into a suitable size beaker, and wash it repeatedly with hot deionized water until no C1 is detected in the filtrate - until. Filter and dry the washed powder to obtain rod-shaped Nb 2 O 5 Powder.

[0042] The XRD diffraction pattern of the niobium pentoxide powder prepared in this example is show...

Embodiment 2

[0044] ① Ingredients ball mill: Weigh AR grade Nb 2 O 5 (99.96%) 40.0015g, AR grade NaCl (99.80%) 40.0013g, add a certain amount (depending on the fluidity of the slurry) of absolute ethanol, use ZrO in a planetary ball mill 2 The balls are mixed with the medium for 2 hours, and the mixed slurry is dried in an oven at 80℃;

[0045] ②Molten salt reaction: The dried powder is put into an alumina crucible with a cover, and put into a muffle furnace for synthesis. The synthesis condition is 1050℃, the temperature is kept for 60 minutes, the heating rate is 10C / min, and the temperature drop rate is 5C / min after the completion of the heat preservation;

[0046] ③Washing and drying: Put the reacted powder into a suitable size beaker, and wash it repeatedly with hot deionized water until no C1 is detected in the filtrate - until. Filter and dry the washed powder to obtain rod-shaped Nb 2 O 5 powder.

[0047] The XRD diffraction pattern of the niobium pentoxide powder prepared in this exampl...

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Abstract

The invention relates to a rod-like niobium pentoxide template grain and a preparation method thereof. The grain is rod-like with a length of 10-20 microns, a diameter of 2-10 microns and a length-diameter ratio of 10-15; the grain is anisotropic. According to the rod-like niobium pentoxide powder grain disclosed by the invention, the grain is rod-like, obviously anisotropic in structure and micron-scale in size; the rod-like niobium pentoxide template grain is an effective template capable of guiding the grain to directionally grow so as to prepare textured ferrocolumbium-containing electroceramics, and is very suitable for orienting various ferrocolumbium-containing electroceramics so as to improve the piezoelectric property.

Description

Technical field [0001] The invention relates to a rod-shaped niobium pentoxide template crystal grain and a preparation method thereof, and belongs to the field of preparation and process research of inorganic oxide materials. Background technique [0002] Lead-based ferroelectric single crystals containing niobium such as Pb(Mg 1 / 3 Nb 2 / 3 )-PbTiO 3 (PMN-PT), Pb(Zn 1 / 3 Nb 2 / 3 )-PbTiO 3 (PZN-PT) and Pb(Ni 1 / 3 Nb 2 / 3 )-PbTiO 3 (PNN-PT), etc. have very broad application prospects in transducers, actuators and ultrasound medicine, but single crystals have long growth cycles, complex preparation processes, difficult to control component uniformity, high cost and size Small and other issues are currently only applied in some high-end devices, and it is difficult to promote them on a large scale. Although the corresponding ferroelectric ceramics have low cost and relatively simple preparation process, their performance is far inferior to single crystal. At the same time, lead-free p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G33/00C04B35/495
Inventor 李国荣周义博曾江涛郑嘹赢阮伟阮学政
Owner 江苏先进无机材料研究院
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