A kind of magnetic composite oxide ceramic membrane with self-sealing pore structure and its preparation method

A composite oxide and ceramic membrane technology, applied in anodic oxidation, prosthesis, coating, etc., can solve the problems of poor mechanical properties, many pores of PEO ceramic membranes, poor corrosion resistance, etc., and achieve magnetic mechanical properties and good protection Excellent performance and corrosion resistance

Active Publication Date: 2020-08-11
广东省科学院生物与医学工程研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a magnetic composite oxide ceramic film with a self-sealing pore structure based on a magnesium matrix and its Preparation

Method used

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  • A kind of magnetic composite oxide ceramic membrane with self-sealing pore structure and its preparation method
  • A kind of magnetic composite oxide ceramic membrane with self-sealing pore structure and its preparation method
  • A kind of magnetic composite oxide ceramic membrane with self-sealing pore structure and its preparation method

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Experimental program
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Effect test

Embodiment 1

[0023] (1) AZ31 magnesium alloy substrate pretreatment: use 400#, 1000#, 2000#, 4000# sandpaper to polish step by step until smooth, rinse with dilute nitric acid, and then use absolute ethanol and distilled water for ultrasonic cleaning.

[0024] (2) Preparation of electrolyte solution: use 12 g / L sodium silicate, 4 g / L potassium hydroxide and 0.8 g / L potassium ferrocyanide as the electrolyte, and deionized water as the solvent to prepare a strong alkaline composite electrolyte solution .

[0025] (3) Plasma electrolytic oxidation treatment: connect the substrate in step (1) to the anode of the DC power supply, and use the stainless steel sheet as the cathode (the distance between the cathode and anode is 3 cm), soak in the electrolyte solution in step (2) Plasma electrolytic oxidation treatment. Using the program boost mode, every 20V increase is maintained for 5 s, the terminal voltage is set to 320 V, and the hold time is 15min. A magnetic composite oxide ceramic film wit...

Embodiment 2

[0028] (1) AZ91 magnesium alloy substrate pretreatment: use 400#, 1000#, 2000#, 4000# sandpaper to polish step by step until smooth, rinse with dilute nitric acid, and then use absolute ethanol and distilled water for ultrasonic cleaning.

[0029] (2) Preparation of electrolyte solution: 8 g / L sodium silicate, 2 g / L potassium hydroxide and 0.4 g / L potassium ferricyanide were used as the electrolyte, and deionized water was used as the solvent to prepare a strong alkaline composite electrolyte solution.

[0030] (3) Plasma electrolytic oxidation treatment: connect the substrate in step (1) to the anode of the DC power supply, and use the stainless steel sheet as the cathode (the distance between the cathode and anode is 3 cm), soak in the electrolyte solution in step (2) Plasma electrolytic oxidation treatment. Using the program boost mode, every 20V increase is maintained for 30s, the terminal voltage is set to 360 V, and the hold time is 20min, a magnetic composite oxide cera...

Embodiment 3

[0033] (1) AZ31 magnesium alloy substrate pretreatment: use 400#, 1000#, 2000#, 4000# sandpaper to polish step by step until smooth, rinse with dilute nitric acid, and then use absolute ethanol and distilled water for ultrasonic cleaning.

[0034] (2) Preparation of electrolyte solution: 14 g / L sodium silicate, 6 g / L potassium hydroxide and 1 g / L potassium ferricyanide were used as the electrolyte, and deionized water was used as the solvent to prepare a strong alkaline composite electrolyte solution.

[0035] (3) Plasma electrolytic oxidation treatment: connect the substrate in step (1) to the anode of the DC power supply, and use the stainless steel sheet as the cathode (the distance between the cathode and anode is 3 cm), soak in the electrolyte solution in step (2) Plasma electrolytic oxidation treatment. Using the program boost mode, every 20V increase is maintained for 10s, the terminal voltage is set to 280V, and the hold time is 5min, a magnetic composite oxide ceramic...

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Abstract

The invention discloses a magnetic composite oxide ceramic membrane with a self-hole-sealing structure and a preparation method. The method includes the following steps that (1), magnesium alloy is subjected to surface pre-treatment; (2), a strongly-basic composite electrolyte solution containing sodium silicate, potassium hydroxide and an iron complex is prepared; and (3), the magnesium alloy inthe step (1) is adopted as a matrix, connected with an anode of a direct current power source and put in a quartz reactor containing the electrolyte solution in the step (2), plasma electrolytic oxidation treatment is carried out, and the magnetic ceramic membrane with the self-hole-sealing structure is prepared on the surface of metal in situ. The component of the prepared membrane is MgO-SiO2-Fe3O4 composite oxide, and the magnetic composite oxide ceramic membrane has magnetism, the special self-hole-sealing micro-structure, good adhesive force and anti-corrosion performance and good application potential.

Description

technical field [0001] The invention relates to the field of in-situ preparation of magnetic ceramic membranes, in particular to a magnetic composite oxide ceramic membrane with a self-sealing pore structure and a preparation method thereof. Background technique [0002] Magnetic bioceramics can respond to external magnetic fields and have good biocompatibility. When it is used as a biological implant, the magnetic bioceramics can be controlled to heat up and kill tumor cells by applying and adjusting the environmental magnetic field. Therefore, magnetic bioceramics are widely used as the heat source of hyperthermia technology, applied in the field of magnetic hyperthermia for bone cancer and showing good development prospects. However, such magnetic ceramics still have the disadvantage of poor mechanical properties in practical applications. [0003] Plasma electrolytic oxidation (PEO), as one of the common metal surface treatment technologies, has been widely used in the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C25D11/30C25D9/06A61L27/30
CPCA61L27/306C25D9/06C25D11/30
Inventor 余希文陆剑华张琳曾史俊余构彬高裕锋王桂华李硕聪钟宏星
Owner 广东省科学院生物与医学工程研究所
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