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A kind of interface-enhanced machinable ceramic and preparation method thereof

A technology of interface enhancement and ceramics, which is applied in the field of ceramics, can solve problems such as cracking, chipping, and reduce the strength of ceramics, and achieve the effect of improving bending strength, high bending strength, and good machinability

Active Publication Date: 2019-02-01
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, mica reduces the strength of the prepared ceramics while exerting its easy-to-process characteristics. The maximum bending strength of the machinable mica glass ceramics prepared by the prior art is only about 70MPa, and edge chipping and cracking often occur during processing. Phenomenon

Method used

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  • A kind of interface-enhanced machinable ceramic and preparation method thereof
  • A kind of interface-enhanced machinable ceramic and preparation method thereof
  • A kind of interface-enhanced machinable ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] This embodiment provides a high-strength machinable mica glass-ceramic, the components of the mica glass-ceramic and their mass percentages are:

[0038]

[0039] This embodiment provides a new machinable mica glass-ceramic, which contains 5% ZrSiO by mass percentage 4 , 70% KMg 3 (Si 3 Al)O 10 f 2 and 25% SiO 2 -B 2 O-Al 2 o 3 -CaO-based glass powder, that is, 5% ZrSiO is added to the original fluorphlogopite glass ceramics 4 . Since ZrSiO 4 The network structure of the crystal can make it distributed between the layered interfaces of fluorphlogopite, increasing the bonding force between layers of fluorphlogopite without destroying its original layered structure, so , can improve the bending strength of fluorphlogopite glass ceramics without changing the machinability of fluorphlogopite ceramics, so that it is more suitable for industrial production and application.

[0040] ZrSiO in a kind of high-strength machinable mica glass-ceramics provided by the inv...

Embodiment 2

[0043] This embodiment provides a high-strength machinable mica glass-ceramic, the components of the mica glass-ceramic and their mass percentages are:

[0044] ZrSiO 4 35%;

[0045] KMg 3 (Si 3 Al)O 10 f 2 55%;

[0046] SiO 2 -B 2 O-Al 2 o 3 -CaO-based glass powder 10%.

[0047] ZrSiO in the processable mica glass ceramics in the present embodiment 4 The mass percentage of crystals is 35%.

[0048] Compared with Example 1, the present embodiment improves the ZrSiO in processable mica glass-ceramic 4 The mass percentage of crystals, at the same time, reduces the percentage of fluorphlogopite in ceramics and increases the ZrSiO 4 The combination of the network structure further improves the bending strength of the machinable mica glass ceramics.

[0049] ZrSiO in a kind of high-strength machinable mica glass-ceramics provided by the invention 4 The mass percentage of crystal should not be greater than 35%, because if ZrSiO 4 The content of crystals is too larg...

Embodiment 3

[0052] Compared with Example 2, the SiO described in this example 2 -B 2 O-Al 2 o 3 -In CaO-based glass powder, SiO 2 The mass percentage content is 51%; B 2 The mass percentage of O is 10%; Al 2 o 3 The mass percentage of CaO is 15%; the mass percentage of CaO is 24%.

[0053] This example further limits SiO in machinable ceramics 2 -B 2 O-Al 2 o 3 -The mass percentage of each component in the CaO-based glass powder.

[0054] After testing, the bending strength of the machinable mica glass-ceramic provided in this embodiment is 124MPa.

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Abstract

The invention relates to interface-enhanced workable ceramics and a preparation method thereof. The workable ceramics comprises components, by mass percentage, 5-35% of ZrSiO4, 55-70% of KMg3(Si3Al)O10F2, and 10-25% of SiO2-B2O-Al2O3-CaO glass powder. The preparation method comprises uniformly mixing K2SiF6, Al(OH)3, SiO2, and MgCO3 according to a mole ratio of 1:2:5:6, and performing sand milling and sintering to prepare fluorophlogopite raw materials; and uniformly mixing ZrSiO4, fluorophlogopite raw materials and SiO2-B2O-Al2O3-CaO glass powder by mass percentage, and performing sand milling, granulation, molding, drying and calcining to obtain the workable ceramics. A net structure of ZrSiO4 is added into an original layer structure of fluorophlogopite glass ceramic, thereby preparing ceramics with high strength.

Description

technical field [0001] The invention relates to a ceramic, in particular to a high-strength machinable ceramic and a preparation method thereof. Background technique [0002] Advanced structural ceramics have been widely used in many fields because of their advantages such as high strength, high temperature resistance, wear resistance, corrosion resistance, and oxidation resistance. Due to the high hardness and high brittleness of ceramic materials, traditional processing methods such as turning, milling, planing, grinding, and drilling cannot be used for processing. Generally, special processing tools such as diamond tools are used for grinding processing. The processing efficiency is low and the processing cost is high. , the post-processing cost accounts for more than 70% of the total cost, and it is difficult to prepare structural components with complex shapes, which affects the popularization and application of ceramic materials in some fields. [0003] Machinable cer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/16C03C6/08C03B32/02
CPCC03B32/02C03C1/00C03C10/16
Inventor 旷峰华张洪波葛兴泽任佳乐任瑞康李自金李懋强
Owner CHINA BUILDING MATERIALS ACAD
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