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Hot pressed sintering preparation technology capable of improving density of ceramic material

A ceramic material and hot-press sintering technology, which is applied in the hot-press sintering preparation process and the hot-pressing sintering preparation process of ceramic materials, can solve the problems of low mechanical properties, low hardness, low density, uneven sintered structure, etc., and achieve convenient preparation , increase hardness, improve the effect of sintering density and uniformity

Active Publication Date: 2017-09-08
SHANDONG UNIV
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  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to overcome the defects of non-uniform sintered structure and low density in the traditional ceramic tool material preparation process, resulting in low mechanical properties, especially low hardness, and to provide a hot-pressing sintering preparation process for improving the density of ceramic materials

Method used

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  • Hot pressed sintering preparation technology capable of improving density of ceramic material
  • Hot pressed sintering preparation technology capable of improving density of ceramic material
  • Hot pressed sintering preparation technology capable of improving density of ceramic material

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Embodiment Construction

[0032] Describe in detail the specific implementation process of the present invention in conjunction with accompanying drawing, as figure 1 Shown:

[0033] (1) First, cutting and crushing high-strength graphite blocks or waste high-strength graphite molds to initially obtain high-strength graphite powder; then pass these graphite powders through a 90-mesh stainless steel sieve to obtain fine and uniform high-strength graphite powders, and package them for use;

[0034] (2) The inner diameter is The graphite sleeve mold 1, the corresponding inner diameter will be The high-strength graphite lower briquetting block 4 is loaded into the graphite sleeve mold 1, and the position of the graphite lower briquetting block 4 at the bottom of the mold is fixed to prevent loosening;

[0035] (3) Take by weighing the insulating material high-strength graphite powder 5A-2 of 1g, put it into the graphite sleeve mold 1, make it evenly distributed on the upper surface of the graphite lower...

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Abstract

The invention relates to the technical field of hot pressed sintering preparation technologies of ceramic materials, in particular to a hot pressed sintering preparation technology capable of improving density of a ceramic material. The hot pressed sintering preparation technology comprises the following steps: putting presintered ceramic powder into a graphite sleeve mould, mounting a high-strength graphite pushing block at the lower part of the graphite sleeve mould, mounting a high-strength graphite upper pressure head at the upper part of the graphite sleeve mould, respectively placing high-strength graphite powder at contact positions between the presintered ceramic powder and the upper pressure head as well as the pushing block as isolation materials, putting into a hot pressed sintering furnace, and sintering according to a sintering technology. The hot pressed sintering preparation technology provided by the invention has the advantages that operation processing is simple, the high-strength graphite powder is easy to prepare, economical and environment-friendly; sintering density and uniformity of a ceramic cutter material prepared by adopting the hot pressed sintering technology are respectively greatly improved, so that the hardness of the material is also obviously improved; and the hot pressed sintering preparation technology is also applicable to development and preparation of structural parts such as wear-resistant ceramic and high-hardness ceramic and has great application potential in the fields of cutter materials, aerospace and the like.

Description

[0001] 1. Technical field [0002] The invention relates to the technical field of hot-pressing sintering preparation technology for ceramic materials, in particular to a hot-pressing sintering preparation technology for improving the density of ceramic materials. [0003] 2. Background technology [0004] Hot pressing sintering is a commonly used preparation process for ceramic materials. Since the sintering driving force is supplemented by applying longitudinal pressure, the densification of ceramics can be achieved in a short sintering time, and a relatively dense bulk ceramic material can be obtained. Therefore, for ceramic materials containing covalent bonds that are difficult to sinter (such as SiC, Si 3 N 4 、TiB 2 ), hot-pressing sintering is an effective preparation process commonly used at present. [0005] For the mold material for hot pressing sintering, whether it is the large outer mold or the upper and lower compacts, high-strength graphite materials with ultra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/645C04B35/10
CPCC04B35/10C04B35/645C04B2235/3826C04B2235/3843C04B2235/77C04B2235/96
Inventor 刘含莲赵斌黄传真王军朱洪涛邹斌姚鹏
Owner SHANDONG UNIV
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