CN114455945A - 一种铁电抗菌陶瓷及其制备方法 - Google Patents
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- 239000000919 ceramic Substances 0.000 title claims abstract description 57
- 230000000844 anti-bacterial effect Effects 0.000 title claims abstract description 38
- 238000002360 preparation method Methods 0.000 title claims abstract description 13
- 229910003237 Na0.5Bi0.5TiO3 Inorganic materials 0.000 claims abstract description 30
- 230000010287 polarization Effects 0.000 claims abstract description 26
- 230000001954 sterilising effect Effects 0.000 claims abstract description 7
- 229910010252 TiO3 Inorganic materials 0.000 claims abstract description 6
- 238000000034 method Methods 0.000 claims description 18
- 239000000843 powder Substances 0.000 claims description 17
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- 239000000203 mixture Substances 0.000 claims description 10
- 229910052845 zircon Inorganic materials 0.000 claims description 8
- GFQYVLUOOAAOGM-UHFFFAOYSA-N zirconium(iv) silicate Chemical compound [Zr+4].[O-][Si]([O-])([O-])[O-] GFQYVLUOOAAOGM-UHFFFAOYSA-N 0.000 claims description 8
- 241000588724 Escherichia coli Species 0.000 claims description 6
- 239000007788 liquid Substances 0.000 claims description 6
- 238000004659 sterilization and disinfection Methods 0.000 claims description 6
- 230000001580 bacterial effect Effects 0.000 claims description 5
- WMWLMWRWZQELOS-UHFFFAOYSA-N bismuth(III) oxide Inorganic materials O=[Bi]O[Bi]=O WMWLMWRWZQELOS-UHFFFAOYSA-N 0.000 claims description 5
- 238000001354 calcination Methods 0.000 claims description 5
- 238000001035 drying Methods 0.000 claims description 5
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- 238000007873 sieving Methods 0.000 claims description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 5
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- 238000003825 pressing Methods 0.000 claims description 4
- 238000005245 sintering Methods 0.000 claims description 4
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 2
- 239000004575 stone Substances 0.000 claims description 2
- 229910052726 zirconium Inorganic materials 0.000 claims description 2
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- 238000002441 X-ray diffraction Methods 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 241000711573 Coronaviridae Species 0.000 description 1
- 241000282414 Homo sapiens Species 0.000 description 1
- 241000315672 SARS coronavirus Species 0.000 description 1
- 206010064097 avian influenza Diseases 0.000 description 1
- 238000009694 cold isostatic pressing Methods 0.000 description 1
- 239000002241 glass-ceramic Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
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Abstract
一种铁电抗菌陶瓷及其制备方法,首先制备具有高致密度的Na0.5Bi0.5TiO3陶瓷,然后将其置于高压直流电场下极化。通过外电场极化使陶瓷内的铁电畴定向排列,进而产生较高的极化电场。在模拟太阳光照射下,正向极化的Na0.5Bi0.5TiO3陶瓷的杀菌效果达到99%。本发明提供的Na0.5Bi0.5TiO3铁电抗菌陶瓷制备工艺简单,材料成本低,绿色环保。
Description
技术领域
本发明涉及抗菌材料技术领域,涉及铁电抗菌陶瓷及其制备方法,具体涉及一种铁电Na0.5Bi0.5TiO3抗菌陶瓷及其制备方法和应用。
背景技术
SARS病毒,禽流感H5N1病毒以及新型冠状病毒等严重威胁着人类的健康和社会的可持续发展。目前,陶瓷材料抗菌效果的实现主要通过在其中添加抗菌粉或抗菌液。其中抗菌粉大多是以负载Ag+、Cu2+的多孔材料、玻璃陶瓷和掺杂TiO2为主,制备工艺复杂,成本高,不耐高温。此外,随着时间的延长,抗菌粉的效果会逐渐减弱甚至消失。因此,开发新型的稳定、耐高温同时具有优异抗菌效果的材料至关重要。
发明内容
为了克服上述现有技术的不足,本发明的目的是提供一种铁电抗菌陶瓷及其制备方法和应用,一种铁电Na0.5Bi0.5TiO3抗菌陶瓷及其制备方法和应用,利用铁电材料具有自发极化的特征,且在外电场作用下,材料内电畴可定向排列,在电场撤去后,电畴仍能保持不反转的特征,以克服现有抗菌材料的缺陷。利用本发明的方法得到的铁电陶瓷具有高效的抗菌效果,制备工艺简单,环境友好,性能稳定。
为了实现上述的目的,本发明采用的技术方案是:
一种铁电抗菌陶瓷,分子式为Na0.5Bi0.5TiO3。
一种铁电抗菌陶瓷的制备方法,包括如下步骤:
步骤一:按照摩尔比1:1:4称取Na2CO3、Bi2O3和TiO2混合形成混合物A;然后将混合物A、锆球石及无水乙醇按照质量比为1:3:2混合后依次进行球磨、烘干、于800-850℃煅烧3-5小时后形成粉体B;
步骤二:将步骤一中合成的粉体B、锆球石及无水乙醇按照质量比为1:3:2混合后进行二次球磨后,用120-200目筛子过筛,压片,烧结;
步骤三:将得到Na0.5Bi0.5TiO3陶瓷置于高压直流极化装置下进行极化,得到具有强抗菌效果的Na0.5Bi0.5TiO3铁电陶瓷。
所述的步骤二中的压片采用冷等静压成型的方法在180-230MPa的压强下完成。
所述的步骤二中烧结的温度为1100-1200°C。
所述的步骤三中的极化过程包括以下内容:
(1)将制备的Na0.5Bi0.5TiO3陶瓷置于高压直流电源中;
(2)开启高压直流电源,在空气中保压极化;
(3)关闭高压直流电源,将Na0.5Bi0.5TiO3陶瓷取出进行抗菌实验。
所述的抗菌实验包括以下步骤:
步骤一:分别将三个未极化、正极化和负极化后的Na0.5Bi0.5TiO3陶瓷置于48孔板中;
步骤二:在48孔板的9个孔中分别加入400µL大肠杆菌菌液;
步骤三:将48孔板置于冰水浴中,在可见光照射下进行光催化杀菌实验。
所述的步骤三中的极化电压为1-10 kV,极化时间为10-30分钟。
所述的步骤二中陶瓷片为圆柱且其直径为8-12mm。
与现有技术相比,本发明具有以下优异的技术效果:
本发明方法制备的Na0.5Bi0.5TiO3陶瓷,其正极化面在5h的可见光照射下,可达到对大肠杆菌99%的杀菌效果,且制备工艺简单,材料成本低,绿色环保,可克服现有抗菌粉热稳定性差,可循环性差,成本高等缺点,高效地达到抗菌效果。
附图说明
图1是Na0.5Bi0.5TiO3陶瓷的XRD图谱;
图2是Na0.5Bi0.5TiO3陶瓷极化前后的抗菌效果图。
具体实施方式
下面对本发明的实施方式做进一步详细描述,但本发明不局限于以下实施例。
实施例1
步骤一:按照摩尔比1:1:4称取Na2CO3、Bi2O3和TiO2混合形成混合物A;然后将混合物A与锆球石及无水乙醇按照质量比为1:3:2混合后依次进行球磨、烘干、于800-850℃煅烧3-5小时后形成粉体B;
步骤二:将步骤一中合成的粉体B与锆球石及无水乙醇按照质量比为1:3:2混合后进行二次球磨后,用120-200目筛子过筛;
步骤三:将过筛后的陶瓷粉在180-230MPa的压强下冷等静压成生坯,并于1100-1200°C温度下烧结3-5小时,得到Na0.5Bi0.5TiO3陶瓷;
步骤四:将制备的Na0.5Bi0.5TiO3陶瓷置于高压直流电源中,开启高压直流电源,在空气中保压极化,其中电压为5-9kV,极化时间为30-120分钟,关闭高压直流电源,将Na0.5Bi0.5TiO3陶瓷取出进行抗菌实验。
步骤五:将三个未极化的Na0.5Bi0.5TiO3陶瓷置于48孔板中,在48孔板的9个孔中分别加入400µL大肠杆菌菌液,将48孔板置于冰水浴中,在可见光照射下进行光催化杀菌实验。
实施例2
步骤一:按照摩尔比1:1:4称取Na2CO3、Bi2O3和TiO2混合形成混合物A;然后将混合物A与锆球石及无水乙醇按照质量比为1:3:2混合后依次进行球磨、烘干、于800-850℃煅烧3-5小时后形成粉体B;
步骤二:将步骤一中合成的粉体B与锆球石及无水乙醇按照质量比为1:3:2混合后进行二次球磨后,用120-200目筛子过筛;
步骤三:将过筛后的陶瓷粉在180-230MPa的压强下冷等静压成生坯,并于1100-1200°C温度下烧结3-5小时,得到Na0.5Bi0.5TiO3陶瓷;
步骤四:将制备的Na0.5Bi0.5TiO3陶瓷置于高压直流电源中,开启高压直流电源,在空气中保压极化,其中电压为5-9kV,极化时间为30-120分钟,关闭高压直流电源,将Na0.5Bi0.5TiO3陶瓷取出进行抗菌实验。
步骤五:将三个经正极化的Na0.5Bi0.5TiO3陶瓷置于48孔板中,在48孔板的9个孔中分别加入400µL大肠杆菌菌液,将48孔板置于冰水浴中,在可见光照射下进行光催化杀菌实验。
实施例3
步骤一:按照摩尔比1:1:4称取Na2CO3、Bi2O3和TiO2混合形成混合物A;然后将混合物A与锆球石及无水乙醇按照质量比为1:3:2混合后依次进行球磨、烘干、于800-850℃煅烧3-5小时后形成粉体B;
步骤二:将步骤一中合成的粉体B与锆球石及无水乙醇按照质量比为1:3:2混合后进行二次球磨后,用120-200目筛子过筛;
步骤三:将过筛后的陶瓷粉在180-230MPa的压强下冷等静压成生坯,并于1100-1200°C温度下烧结3-5小时,得到Na0.5Bi0.5TiO3陶瓷;
步骤四:将制备的Na0.5Bi0.5TiO3陶瓷置于高压直流电源中,开启高压直流电源,在空气中保压极化,其中电压为5-9kV,极化时间为30-120分钟,关闭高压直流电源,将Na0.5Bi0.5TiO3陶瓷取出进行抗菌实验。
步骤五:将三个经负极化的Na0.5Bi0.5TiO3陶瓷置于48孔板中,在48孔板的9个孔中分别加入400µL大肠杆菌菌液,将48孔板置于冰水浴中,在可见光照射下进行光催化杀菌实验。
对实施例1-3制备的样品进行XRD测试,得到图1结果,图1是Na0.5Bi0.5TiO3陶瓷极化前后的XRD图谱,从图中可以看出,极化前后,所制备的Na0.5Bi0.5TiO3陶瓷的物相没有发生改变。图2是Na0.5Bi0.5TiO3陶瓷极化前后的抗菌效果图,从图2可以看出,正极化表面在可见光照射5小时的抗菌效果可达99%。
综上所述,本发明所提出的正极化的Na0.5Bi0.5TiO3陶瓷很大程度提升了铁电陶瓷的抗菌效果,提供了一种具有优异抗菌效果的铁电陶瓷及其制备方法和应用。
Claims (8)
1.一种铁电抗菌陶瓷,其特征在于,分子式为Na0.5Bi0.5TiO3。
2.一种铁电抗菌陶瓷的制备方法,其特征在于,包括如下步骤:
步骤一:按照摩尔比1:1:4称取Na2CO3、Bi2O3和TiO2混合形成混合物A;然后将混合物A、锆球石及无水乙醇按照质量比为1:3:2混合后依次进行球磨、烘干、于800-850℃煅烧3-5小时后形成粉体B;
步骤二:将步骤一中合成的粉体B、锆球石及无水乙醇按照质量比为1:3:2混合后进行二次球磨后,用120-200目筛子过筛,压片,烧结;
步骤三:将得到Na0.5Bi0.5TiO3陶瓷置于高压直流极化装置下进行极化,得到具有强抗菌效果的Na0.5Bi0.5TiO3铁电陶瓷。
3.根据权利要求2所述的一种铁电抗菌陶瓷的制备方法,其特征在于,所述的步骤二中的压片采用冷等静压成型的方法在180-230MPa的压强下完成。
4.根据权利要求2所述的一种铁电抗菌陶瓷的制备方法,其特征在于,所述的步骤二中烧结的温度为1100-1200°C。
5.根据权利要求2所述的一种铁电抗菌陶瓷的制备方法,其特征在于,所述的步骤三中的极化过程包括以下内容:
(1)将制备的Na0.5Bi0.5TiO3陶瓷置于高压直流电源中;
(2)开启高压直流电源,在空气中保压极化;
(3)关闭高压直流电源,将Na0.5Bi0.5TiO3陶瓷取出进行抗菌实验。
6.根据权利要求5所述的一种铁电抗菌陶瓷的制备方法,其特征在于,抗菌实验包括以下步骤:
步骤一:分别将三个未极化、正极化和负极化后的Na0.5Bi0.5TiO3陶瓷置于48孔板中;
步骤二:在48孔板的9个孔中分别加入400µL大肠杆菌菌液;
步骤三:将48孔板置于冰水浴中,在可见光照射下进行光催化杀菌实验。
7.根据权利要求2所述的一种铁电抗菌陶瓷的制备方法,其特征在于,所述的步骤三中的极化电压为1-10 kV,极化时间为10-30分钟。
8.根据权利要求2所述的一种铁电抗菌陶瓷的制备方法,其特征在于,所述的步骤二中陶瓷片为圆柱且其直径为8-12mm。
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