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Ferroelectric antibacterial ceramic and preparation method thereof

A kind of antibacterial ceramics, ferroelectric technology, applied in the field of ferroelectric antibacterial ceramics and its preparation, ferroelectric Na0.5Bi0.5TiO3 antibacterial ceramics and its preparation, can solve the problems of weakened effect of antibacterial powder, complex preparation process, high cost, etc., to achieve The effect of overcoming poor thermal stability, simple preparation process, and low material cost

Pending Publication Date: 2022-05-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, most of the antibacterial powders are loaded with Ag + 、Cu 2+ Porous materials, glass ceramics and doped TiO 2 Mainly, the preparation process is complicated, the cost is high, and it is not resistant to high temperature
In addition, as time goes by, the effect of antibacterial powder will gradually weaken or even disappear

Method used

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  • Ferroelectric antibacterial ceramic and preparation method thereof
  • Ferroelectric antibacterial ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] Step 1: Weigh Na according to the molar ratio 1:1:4 2 CO 3 、 Bi 2 o 3 and TiO 2 Mix to form mixture A; then mix mixture A with zirconium balls and absolute ethanol according to the mass ratio of 1:3:2, then perform ball milling, drying, and calcining at 800-850°C for 3-5 hours to form powder B ;

[0029] Step 2: Mix the powder B synthesized in Step 1 with zirconium balls and absolute ethanol according to a mass ratio of 1:3:2, perform secondary ball milling, and sieve through a 120-200 mesh sieve;

[0030] Step 3: cold isostatically pressing the sieved ceramic powder into a green body under a pressure of 180-230MPa, and sintering at a temperature of 1100-1200°C for 3-5 hours to obtain Na 0.5 Bi 0.5 TiO 3 ceramics;

[0031] Step 4: the prepared Na 0.5 Bi 0.5 TiO 3 The ceramics are placed in a high-voltage DC power supply, turn on the high-voltage DC power supply, and polarize in the air, where the voltage is 5-9kV, and the polarization time is 30-120 minutes, ...

Embodiment 2

[0034] Step 1: Weigh Na according to the molar ratio 1:1:4 2 CO 3 、 Bi 2 o 3 and TiO 2 Mix to form mixture A; then mix mixture A with zirconium balls and absolute ethanol according to the mass ratio of 1:3:2, then perform ball milling, drying, and calcining at 800-850°C for 3-5 hours to form powder B ;

[0035] Step 2: Mix the powder B synthesized in Step 1 with zirconium balls and absolute ethanol according to a mass ratio of 1:3:2, perform secondary ball milling, and sieve through a 120-200 mesh sieve;

[0036] Step 3: cold isostatically pressing the sieved ceramic powder into a green body under a pressure of 180-230MPa, and sintering at a temperature of 1100-1200°C for 3-5 hours to obtain Na 0.5 Bi 0.5 TiO 3 ceramics;

[0037] Step 4: the prepared Na 0.5 Bi 0.5 TiO 3 The ceramics are placed in a high-voltage DC power supply, turn on the high-voltage DC power supply, and polarize in the air, where the voltage is 5-9kV, and the polarization time is 30-120 minutes, ...

Embodiment 3

[0040] Step 1: Weigh Na according to the molar ratio 1:1:4 2 CO 3 、 Bi 2 o 3 and TiO 2 Mix to form mixture A; then mix mixture A with zirconium balls and absolute ethanol according to the mass ratio of 1:3:2, then perform ball milling, drying, and calcining at 800-850°C for 3-5 hours to form powder B ;

[0041] Step 2: Mix the powder B synthesized in Step 1 with zirconium balls and absolute ethanol according to a mass ratio of 1:3:2, perform secondary ball milling, and sieve through a 120-200 mesh sieve;

[0042]Step 3: cold isostatically pressing the sieved ceramic powder into a green body under a pressure of 180-230MPa, and sintering at a temperature of 1100-1200°C for 3-5 hours to obtain Na 0.5 Bi 0.5 TiO 3 ceramics;

[0043] Step 4: the prepared Na 0.5 Bi 0.5 TiO 3 The ceramics are placed in a high-voltage DC power supply, turn on the high-voltage DC power supply, and polarize in the air, where the voltage is 5-9kV, and the polarization time is 30-120 minutes, t...

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Abstract

The preparation method comprises the following steps: firstly, preparing Na0. 5Bi0. 5TiO3 ceramic with high density, and then placing the Na0. 5Bi0. 5TiO3 ceramic in a high-voltage direct-current electric field for polarization; ferroelectric domains in the ceramic are directionally arranged through polarization of an external electric field, so that a relatively high polarization electric field is generated. Under the irradiation of simulated sunlight, the sterilization effect of the forward polarized Na < 0.5 > Bi < 0.5 > TiO < 3 > ceramic reaches 99%. The Na0. 5Bi0. 5TiO3 ferroelectric antibacterial ceramic provided by the invention is simple in preparation process, low in material cost, green and environment-friendly.

Description

technical field [0001] The invention relates to the technical field of antibacterial materials, to ferroelectric antibacterial ceramics and a preparation method thereof, in particular to a ferroelectric Na 0.5 Bi 0.5 TiO 3 Antibacterial ceramics and its preparation method and application. Background technique [0002] SARS virus, avian influenza H5N1 virus and new coronavirus seriously threaten human health and sustainable development of society. At present, the antibacterial effect of ceramic materials is mainly achieved by adding antibacterial powder or antibacterial liquid therein. Among them, most of the antibacterial powders are loaded with Ag + 、Cu 2+ Porous materials, glass ceramics and doped TiO 2 Mainly, the preparation process is complicated, the cost is high, and it is not resistant to high temperature. In addition, as time goes on, the effect of antibacterial powder will gradually weaken or even disappear. Therefore, it is very important to develop new ma...

Claims

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Application Information

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IPC IPC(8): C04B35/475C04B35/622C04B41/80
CPCC04B35/475C04B35/622C04B41/80C04B41/009C04B2235/442C04B2235/96
Inventor 蒲永平吉佳敏蒲改平欧阳涛周世昱
Owner SHAANXI UNIV OF SCI & TECH