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Preparation method of high-transparency potassium sodium niobate-barium strontium titanate transparent ceramic

A technology of potassium sodium niobate and barium strontium titanate, applied in the field of lead-free piezoelectric materials, can solve problems such as unfriendly environment and human health, and achieve the effects of easy operation, simple process steps and good repeatability

Inactive Publication Date: 2019-02-12
FUZHOU UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, lead-based materials (lead content greater than 60wt%) are not friendly to the environment and human health

Method used

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  • Preparation method of high-transparency potassium sodium niobate-barium strontium titanate transparent ceramic
  • Preparation method of high-transparency potassium sodium niobate-barium strontium titanate transparent ceramic
  • Preparation method of high-transparency potassium sodium niobate-barium strontium titanate transparent ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] (1) Ingredients: Weigh the raw material Na according to the mass ratio 2 CO 3 : K 2 CO 3 : Nb 2 o5 : BaCO 3 : SrCO 3 : TiO 2 = 0.399 : 0.52 : 1 : 0.059 : 0.044 : 0.024, then mix to obtain the mixture;

[0034] (2) Ball milling: add the mixture into the ball milling medium, put it into a ball mill tank and carry out ball milling for 8 h at a milling speed of 250 r / min. After the ball milling, the mixture is dried in an oven at 80°C, and then Then the mixture is put into a mortar for grinding, the grinding medium is ethanol, and the weight ratio of the mixture to ethanol is 1:2;

[0035] (3) Pre-burning: Add the above-mentioned ground mixture into the crucible, compact it, put it in a muffle furnace, raise the temperature to 800 °C at a heating rate of 3 °C / min and keep it warm for 2 h for pre-burning, and then Then take out the crucible after naturally cooling to room temperature;

[0036] (4) Secondary ball milling: After adding ball milling medium to the...

Embodiment 2

[0044] (1) Ingredients: Weigh the raw material Na according to the mass ratio 2 CO 3 : K 2 CO 3 : Nb 2 o 5 : BaCO 3 : SrCO 3 : TiO 2 = 0.399 : 0.52 : 1 : 0.067 : 0.05 : 0.027, then mix to obtain the mixture;

[0045] (2) Ball milling: Add the mixture to the ball milling medium, put it into a ball mill tank and mill for 12 h at a milling speed of 200 r / min. After the ball milling, put the mixture in an oven for drying at 85°C, and Then the mixture is put into a mortar for grinding, the grinding medium is ethanol, and the weight ratio of the mixture to ethanol is 1:2.5;

[0046] (3) Pre-burning: Add the above-mentioned ground mixture into the crucible, after compaction, put it in a muffle furnace, raise the temperature to 850°C at a heating rate of 4°C / min and keep it warm for 4 hours for pre-burning , and then take out the crucible after naturally cooling to room temperature;

[0047] (4) Secondary ball milling: After adding ball milling media to the above-menti...

Embodiment 3

[0056] (1) Ingredients: Weigh the raw material Na according to the mass ratio 2 CO 3 : K 2 CO 3 : Nb 2 o 5 : BaCO 3 : SrCO 3 : TiO 2 = 0.399 :0.52 : 1 : 0.074: 0.056 : 0.03, then mix to obtain the mixture;

[0057] (2) Ball milling: Add the mixture into the ball milling medium, put it into a ball mill tank and mill it for 10 h at a milling speed of 250 r / min. After the ball milling, dry the mixture in an oven at 80°C, and then Then the mixture is put into a mortar for grinding, the grinding medium is ethanol, and the weight ratio of the mixture to ethanol is 1:2.5;

[0058] (3) Pre-burning: Add the above-mentioned ground mixture into the crucible, after compaction, put it in a muffle furnace, raise the temperature to 800 °C at a heating rate of 5 °C / min and keep it warm for 3 h for pre-burning. Then take out the crucible after naturally cooling to room temperature;

[0059] (4) Secondary ball milling: After adding ball milling media to the above-mentioned pre-b...

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Abstract

The invention discloses a preparation method of high-transparency potassium sodium niobate-barium strontium titanate transparent ceramic. The preparation method includes the steps of preparing (K0.5Na0.5)NbO3-xBaSrTiO3 powder, pelleting the powder through dry pressing and molding, and performing sintering at the temperature of 1,200-1,230 DEG C to obtain the potassium sodium niobate-barium strontium titanate transparent ceramic, wherein the potassium sodium niobate-barium strontium titanate transparent ceramic has fine grains, a compact structure, high light transmittance (up to 61% in a near-infrared region) and high electrical property (the relative dielectric constant being 1,370-1,501), and the optical energy band gap is about 3.01 eV. Compared with monocrystal materials, the high-transparency potassium sodium niobate-barium strontium titanate transparent ceramic has the advantages of simple preparation process, low cost, and practical application prospect in manufacture of photoelectric devices.

Description

technical field [0001] The invention relates to the field of lead-free piezoelectric materials, in particular to a method for preparing high-transparency potassium sodium niobate-barium strontium titanate transparent ceramics. Background technique [0002] Materials with good optical transparency and strong electro-optic effect have long been widely used in the fabrication of active optical devices such as optoelectronic switches and modulators. Lithium niobate (LiNbO 3 ) single crystal is the industry benchmark for electro-optic (EO) materials, but due to LiNbO 3 Crystals have disadvantages such as low EO effect, high temperature dependence, small size, and high cost, making them difficult to be widely used. EO ceramics are widely used in various optoelectronic devices, such as optical filters, switches, modulators, and data processing devices, due to their strong EO response, high ceramic toughness, simple fabrication, low manufacturing cost, and large size. [0003] At...

Claims

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Application Information

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IPC IPC(8): C04B35/495C04B35/622
CPCC04B35/495C04B35/622C04B2235/3201C04B2235/3213C04B2235/3215C04B2235/3236C04B2235/3255C04B2235/9653
Inventor 吴啸林锦锋陈鹏飞林枞刘春文齐艳华徐洁
Owner FUZHOU UNIVERSITY
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