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A kind of fe-a12o3 cermet sealing ring and preparation method thereof

A technology of fe-a12o3 and cermet, which is applied in the field of cermet materials, can solve the problems of affecting the working stability, the sealing parts are fragile and easy to crack, and the uniformity of toughness and microstructure is insufficient, so as to improve the wear resistance and improve the Hardness and mechanical strength, the effect of improving toughness

Active Publication Date: 2019-05-17
NINGBO DONGLIAN MECHANICAL SEAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

With the development of science and technology, its requirements are getting higher and higher, especially for some sealing parts with harsh working environments. Ordinary alumina materials have serious deficiencies in toughness and microstructure uniformity, which eventually lead to fragile and cracked sealing parts. affect the stability of their work

Method used

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  • A kind of fe-a12o3 cermet sealing ring and preparation method thereof
  • A kind of fe-a12o3 cermet sealing ring and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] a Fe-A1 2 o 3 A cermet sealing ring consisting of the following components in weight percent: aluminum oxide 50%, iron oxide 3%, zirconium oxide 2.2%, cerium oxide 4%, LaNbO 4 : 0.6%, Aluminate 1.5%, Calcium Carbonate 0.3%, Magnesium Carbonate 0.4%, Wax Emulsion 0.25%, Polymethacrylate Ammonium 0.7%, Ethyl Acrylate 0.6%, Methylcellulose 0.7%, Polyethylene 0.2% alcohol, 0.2% triammonium citrate, 0.4% gum arabic, and the balance is clay and irremovable impurities.

[0039] According to the above Fe-A1 2 o 3 The components of the cermet sealing ring are weighed as raw materials, and aluminum oxide, iron oxide, zirconium oxide, cerium oxide, LaNbO 4 , aluminate, calcium carbonate, and magnesium carbonate were stirred and mixed evenly, and transported to a ball mill with a rotating speed of 250r / min for wet grinding for 3 hours to obtain powder, wherein the ball-to-material ratio was 3:1, and the solid-to-liquid ratio was 1:1;

[0040] Mix the obtained powder with wax e...

Embodiment 2

[0045] a Fe-A1 2 o 3 A cermet seal ring consisting of the following components in weight percent: alumina: 48%, iron oxide: 2.8%, zirconia: 2.6%, ceria: 4.2%, LaNbO 4 : 0.4%, Aluminate: 1.3%, Calcium Carbonate: 0.4%, Magnesium Carbonate: 0.5%, Wax Emulsion 0.15%, Ammonium Polymethacrylate 0.5%, Ethyl Acrylate 0.3%, Methyl Cellulose 1.2% , triammonium citrate 0.7%, and the balance is clay and irremovable impurities.

[0046] According to the above Fe-A1 2 o 3 Component composition of cermet sealing ring Weigh raw materials, aluminum oxide, iron oxide, zirconium oxide, cerium oxide, LaNbO 4 , aluminate, calcium carbonate, and magnesium carbonate were stirred and mixed evenly, and were transported to a ball mill with a rotating speed of 230r / min for wet grinding for 3.5h to obtain powder, wherein the ball-to-material ratio was 2:1, and the solid-to-liquid ratio was 1.5:1;

[0047] Mix the obtained powder with wax emulsion and ammonium polymethacrylate at 110°C for 50 minutes...

Embodiment 3

[0052] a Fe-A1 2 o 3 A cermet seal ring consisting of the following components in weight percent: alumina: 52%, iron oxide: 3.1%, zirconia: 2.2%, ceria: 4.6%, LaNbO 4 : 0.8%, aluminate: 1.7%, calcium carbonate: 0.2%, magnesium carbonate: 0.3%, wax emulsion 0.07%, ammonium polymethacrylate 0.8%, polyvinyl alcohol 0.7%, methylcellulose 0.2% , gum arabic 0.8%, and the balance is clay and irremovable impurities.

[0053] According to the above Fe-A1 2 o 3 Component composition of cermet sealing ring Weigh raw materials, aluminum oxide, iron oxide, zirconium oxide, cerium oxide, LaNbO 4 , aluminate, calcium carbonate, and magnesium carbonate were evenly mixed, and transported to a ball mill with a rotating speed of 260r / min for wet milling for 4h to obtain powder, wherein the ball-to-material ratio was 2.5:1, and the solid-to-liquid ratio was 1.5:1;

[0054] Mix the obtained powder with wax emulsion and ammonium polymethacrylate at 115°C for 50 minutes, then spray granulate an...

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Abstract

The invention relates to a Fe-Al2O3 metal ceramic sealing ring with excellent wear resistance and toughness and uniform microscopic structures, and a preparation method thereof. The Fe-Al2O3 metal ceramic sealing ring is composed of, by weight, 40 to 60% of alumina, 2 to 4% of iron oxide, 1 to 3% of zirconia, 3 to 5% of cerium oxide, 0.1 to 1% of LaNbO4, 1 to 2% of an aluminate, 0.1 to 1% of calcium carbonate, 0.2 to 0.8% of magnesium carbonate, 0.02 to 0.5% of a wax emulsion, 0.3 to 1.2% of ammonium polymethacrylate, 0.5 to 3% of a binder, 0.2 to 1% of a dispersant, and the balance clay and inevitable impurities. The composition of the Fe-Al2O3 metal ceramic sealing ring is reasonable; and the Fe-Al2O3 metal ceramic sealing ring with excellent performance is prepared through strict preparation technology.

Description

Technical field: [0001] The invention belongs to the field of cermet materials, in particular to a Fe-Al 2 o 3 A cermet sealing ring and a preparation method thereof. Background technique [0002] Alumina ceramics are a kind of aluminum oxide (A1 2 o 3 ) as the main ceramic material is the most stable substance among oxides. It has the characteristics of high temperature resistance, corrosion resistance, wear resistance, high mechanical strength, high hardness, high electrical insulation performance and low dielectric loss. It is widely used in mechanical electronics , chemical engineering, electronic power, biomedicine, aerospace and other fields. With the development of science and technology, the requirements for it are getting higher and higher, especially for some sealing parts with harsh working environments. Ordinary alumina materials have serious deficiencies in toughness and microstructure uniformity, which eventually lead to fragile and cracked sealing parts. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C29/12C22C1/05B22F3/10
CPCB22F3/001B22F3/1007B22F2999/00C22C1/051C22C29/12B22F2201/013
Inventor 叶传剑李友宝励永平
Owner NINGBO DONGLIAN MECHANICAL SEAL
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