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Porous biological piezoelectric ceramic and preparation method thereof

A bio-piezoelectric ceramic and ceramic powder technology, which is applied to ceramic products, other household appliances, applications, etc., can solve the problems of irritating taste, discomfort to the human body, and discomfort in medical materials, and achieve uniform pore structure and foaming effect. Excellent and complete effect

Inactive Publication Date: 2017-11-10
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The above methods can prepare various types of porous ceramic materials, but some polymer materials are used in the preparation process. Most of these polymer materials have a pungent taste during use, which will cause discomfort to the human body and are not suitable for medical use. Material

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  • Porous biological piezoelectric ceramic and preparation method thereof
  • Porous biological piezoelectric ceramic and preparation method thereof
  • Porous biological piezoelectric ceramic and preparation method thereof

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preparation example Construction

[0031] The preparation method of porous LNK biological piezoelectric ceramics of the present invention is carried out according to the following processes:

[0032] Step 1, pre-burning LNK powder: with niobium pentoxide (Nb 2 o 5 ), potassium carbonate (K 2 CO 3 ), sodium carbonate (Na 2 CO 3 ), lithium carbonate (Li 2 CO 3 ) as raw material, according to chemical formula (Li 0.06 Na 0.5 K 0.44 )NbO 3 After batching, ball mill and pre-burn the powder after taking it out. The pre-firing system is to raise the temperature to 250°C at 3°C / min and keep it for 30 minutes; then raise the temperature to 600°C at 3°C / min and keep it for 120 minutes; then raise the temperature to 890°C at 3°C / min and keep it for 2 hours; get LNK ceramics powder.

[0033] Step 2, prepare LNK ceramic slurry: Pour the pre-fired LNK ceramic powder and deionized water into the ball mill tank, and add ZrO at a ball weight ratio of 1:2 2Small balls, ball milled for 12 hours to obtain the LNK slur...

Embodiment 1

[0046] niobium pentoxide (Nb 2 o 5 ), potassium carbonate (K 2 CO 3 ), sodium carbonate (Na 2 CO 3 ), lithium carbonate (Li 2 CO 3 ) as raw material, according to chemical formula (Li 0.06 Na 0.5 K 0.44 )NbO 3 Ingredients, pre-fired LNK powder at 890°C. Egg white is extracted from eggs, after removing impurities in the egg white, it is magnetically stirred for 2 hours, and the upper layer of foam is removed to obtain a pure egg white liquid for later use. Prepare LNK ceramic slurry according to the mass ratio of LNK powder and deionized water at 1:0.5, and put it into a ball mill jar for ball milling for 12 hours. Add 20% by mass of egg white as a foaming agent to the ball-milled LNK slurry, and stir magnetically for 2 hours to fully foam. Pour the fully foamed slurry into a self-made mold, put it into a water bath and heat it at 80°C to facilitate the curing of the slurry. The cured slurry was allowed to stand at room temperature for 24 hours, then put into an ov...

Embodiment 2

[0048] niobium pentoxide (Nb 2 o 5 ), potassium carbonate (K 2 CO 3 ), sodium carbonate (Na 2 CO 3 ), lithium carbonate (Li 2 CO 3 ) as raw material, according to chemical formula (Li 0.06 Na 0.5 K 0.44 )NbO 3 Ingredients, pre-fired LNK powder at 890°C. Egg white is extracted from eggs, after removing impurities in the egg white, it is magnetically stirred for 2 hours, and the upper layer of foam is removed to obtain a pure egg white liquid for later use. Prepare LNK ceramic slurry according to the mass ratio of LNK powder and deionized water of 1:0.67, and put it into a ball mill jar for ball milling for 12 hours. Add 30% by mass of egg white as a foaming agent to the ball-milled LNK slurry, and stir magnetically for 2 hours to fully foam. Pour the fully foamed slurry into a self-made mold, put it into a water bath and heat it at 80°C to facilitate the curing of the slurry. The cured slurry was left to stand at room temperature for 24 hours, then put into an oven...

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Abstract

The invention discloses a porous biological piezoelectric ceramic and a preparation method thereof. By using natural egg white as a foaming agent, foam stabilizer and curing agent, a foaming process is utilized to prepare the LNK biological piezoelectric ceramic material with abundant pores and uniform pore size. The mass ratio of LNK powder to water in the slurry is 1:(0.5-1); and the foaming agent accounts 20-35 wt% of the deionized water in the slurry. When the mass ratio of the LNK ceramic powder to the deionized water is 1:0.67 and the foaming agent accounts for 30 wt% of the deionized water in the slurry, the porous biological piezoelectric ceramic has the best piezoelectric properties, wherein the piezoelectric constant d33 is 48 pC / N, and the relative dielectric constant is 67.29. At this time, the porosity of the porous LNK is up to 55%, the pore size distribution is 100-400 mu m or so, and all pore are open and communicates with each other. The LNK porous biological piezoelectric ceramic has excellent piezoelectric properties, and can stimulate cells and promote cell proliferation and differentiation; the porous structure is beneficial to growing in of cell tissues, and promotes better formation of bones; and thus, the LNK porous biological piezoelectric ceramic can be used as a bone substitute material in the fields of biology, medicine and the like.

Description

technical field [0001] The invention relates to a preparation method of a porous biological piezoelectric ceramic material, in particular to a new process for preparing porous lithium sodium potassium (LNK) lead-free piezoelectric ceramics by a foaming method. Background technique [0002] Lithium, sodium, and potassium niobate (LNK) lead-free piezoelectric ceramics have attracted more and more attention in the field of biomaterials due to their excellent piezoelectric properties, good biocompatibility, and non-toxic components. However, most of the biopiezoelectric ceramics currently studied are dense materials, which inevitably have defects such as small surface area, limited space for bone cell growth, and inability of bone tissue to grow in. Compared with porous structures, their bone repair efficiency is low. It shows that hard tissue implant materials with a porous structure are also conducive to cell adhesion growth, extracellular matrix deposition, nutrition and oxyg...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/10C04B35/495C04B35/64
CPCC04B38/10C04B35/495C04B35/64C04B2235/3201C04B2235/3203C04B2235/6562C04B2235/6567C04B38/0054C04B38/0058C04B38/0009
Inventor 陈彩凤季骏王安东焦旭伦
Owner JIANGSU UNIV
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