Preparation method of nano-fluorapatite glass ceramic

A fluoroapatite and glass ceramic technology, which is applied in the field of preparation of nano-fluoroapatite glass ceramics, can solve the problems of long production cycle, high equipment requirements, long glass nucleation and crystallization heat treatment time, etc., and achieves easy crystallization. Chemical and processability improvement effect

Inactive Publication Date: 2017-07-28
UNIV OF JINAN
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  • Application Information

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Problems solved by technology

However, due to the mutual influence of density and grain size during preparation, it has been difficult to prepare high-density nanoceramics at present.
Most of the preparation methods of glass ceramics in the prior art are glass ceramics prepared by pouring method. This method req

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  • Preparation method of nano-fluorapatite glass ceramic

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Effect test

Embodiment 1

[0022] A preparation method of nano fluorapatite glass ceramics, comprising the following steps:

[0023] (1) Preparation of fluoroapatite powder: use the chemical precipitation method to prepare fluoroapatite powder with a particle size of about 30nm, then dry it in a vacuum drying oven at a temperature of 60°C, and finally put the powder into a corundum ball mill jar Ball mill for 1 hour, then pass through a 200-mesh sieve;

[0024] (2) Preparation of fluorine phlogopite powder: Pour high-temperature molten raw materials into water at room temperature for quenching, then dry them in a vacuum oven at 60°C, then put the raw materials into a corundum ball mill jar for ball milling for 1 hour, and pass through 200 mesh ;

[0025] (3) Mixing: the proportioning ratio is 70% of fluorphlogopite powder and 30% of fluoroapatite powder in parts by weight, put into a ball mill for mixing, and the mixing time is 5h;

[0026] (4) Compression molding: press the uniformly mixed powder int...

Embodiment 2

[0029] A preparation method of nano fluorapatite glass ceramics, comprising the following steps:

[0030] (1) Preparation of fluoroapatite powder: use the chemical precipitation method to prepare fluoroapatite powder with a particle size of about 60nm, then dry it in a vacuum drying oven at a temperature of 80°C, and finally put the powder into a corundum ball mill jar Medium ball mill for 4 hours, then pass through a 200-mesh sieve;

[0031] (2) Preparation of fluorphlogopite powder: Pour high-temperature molten raw materials into water at room temperature for quenching, then dry them in a vacuum drying oven at a temperature of 80°C, then put the raw materials into a corundum ball mill jar for ball milling for h, and pass through 200 mesh screen;

[0032] (3) Mixing: select the proportioning by weight to be 70% of fluorphlogopite powder and 30% of fluoroapatite powder, put them into a ball mill for mixing, and the mixing time is 3 hours;

[0033] (4) Compression molding: pr...

Embodiment 3

[0035] Performance test of the nanometer fluoroapatite glass-ceramic obtained in embodiment 3

[0036] Carry out mechanical property test to the glass-ceramic of above gained:

[0037] The relative density of the sintered compact is measured using the Archimedes principle, the flexural strength and elastic modulus are measured on a universal testing machine, the fracture toughness of the material is measured on a HD9-45 hardness tester, and the load is 100N. The loading time is 15s, and the Vickers hardness of the material is calculated by the following formula: H=1.8544P / d 2 , where H is the Vickers hardness (HV), P is the load of the indenter (N), and d is the average value of the indentation diagonal (um); the fracture toughness of the material is measured by the indentation method, and at 500 times XJP- Measure the diagonal length of the indentation and the length of the indentation crack under a 200-type metallographic microscope, and use the following formula to calcula...

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Abstract

The invention relates to a preparation method of nano-fluorapatite glass ceramic, and belongs to the technical field of glass ceramic preparation. According to the preparation method of the nano-fluorapatite glass ceramic, pressing and step-by-step sintering processes are mainly adopted, and raw materials do not need to be treated at melting and glass formation stages. Compared with a pouring method, according to the method disclosed by the invention, raw material components are not required to meet a certain glass formation system, separation positions of crystal in a sintering method are mainly concentrated on the surfaces of particles or interfaces among the phases and thus the nano-fluorapatite glass ceramic has a relatively large superficial area, so that glass is more easily crystallized or even a nucleating agent or a necessary additive for forming the glass capable of adjusting an oxide through a network do not need to be added to the raw materials.

Description

technical field [0001] The invention relates to a method for preparing nano-fluoroapatite glass ceramics, belonging to the technical field of glass ceramics preparation. Background technique [0002] The natural HAp in the human body is acicular crystals of about 70nm, so nano-fluoroapatite ceramics is a dental and orthopedic repair material with medical, biological activity and good mechanical properties. Compared with ordinary ceramics, fluorapatite nano-ceramics Due to the presence of a large number of grain boundaries, the performance is greatly improved and differentiated. However, due to the mutual influence of density and grain size during preparation, it has been difficult to prepare high-density nano-ceramics at present. Most of the preparation methods of glass ceramics in the prior art are glass ceramics prepared by pouring method. This method requires higher preparation temperature and higher requirements on equipment, and the glass nucleation and crystallization...

Claims

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Application Information

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IPC IPC(8): C03C10/16C03C6/00C03C1/02C03B19/06
CPCC03B19/06C03C1/00C03C1/026C03C10/16
Inventor 付坤王守仁王高琦杨丽颖王立虎王鑫松张晓东颜新宇
Owner UNIV OF JINAN
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