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A kind of spinel fiber reinforced zirconia refractory material and preparation process thereof

A refractory material and preparation technology, applied in the field of refractory materials, can solve problems such as short service life, severe cracking, and easy cracks, and achieve the effects of improved service life, high thermal shock resistance, and stable performance

Active Publication Date: 2020-09-01
山西同邦科技开发有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem that the zirconia matrix refractory material is prone to cracks and severe cracking under the condition of high cycle temperature, resulting in short service life. It provides a rare earth-doped magnesium oxide partially stabilized zirconia micropowder, It is prepared from dead-burned magnesia fine powder, metal aluminum powder, phenolic-butyronitrile thermoplastic phenolic resin, epoxy resin and ferrocene. Spinel fiber reinforced zirconia refractories with multiple performances such as shock resistance and thermomechanical properties

Method used

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  • A kind of spinel fiber reinforced zirconia refractory material and preparation process thereof
  • A kind of spinel fiber reinforced zirconia refractory material and preparation process thereof

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Effect test

Embodiment 1

[0037] A preparation process of a spinel fiber reinforced zirconia refractory material, the preparation steps of the refractory material are as follows:

[0038] 1) Preparation of rare earth-doped magnesia partially stabilized zirconia micropowder: a) After mixing the monoclinic zirconia, fused magnesia fine powder, high alumina bauxite micropowder, praseodymium nitrate and lanthanum nitrate through wet ball milling Dry at 100°C for 40 minutes to obtain the precursor powder;

[0039] b) The precursor powder obtained in a) is placed at 750°C for 230 minutes, and air-cooled to obtain a doped powder;

[0040] c) Soak the doped powder obtained in b) for 3 minutes in distilled water, filter the powder with filter paper, dry the powder at 100°C for 40 minutes, and pass through a 200-mesh sieve to obtain the rare earth-doped magnesium oxide part Stabilized zirconia powder;

[0041] 2) Mix the rare earth-doped magnesia partially stabilized zirconia micropowder obtained in 1) with dead...

Embodiment 2

[0046] A preparation process of a spinel fiber reinforced zirconia refractory material, the preparation steps of the refractory material are as follows:

[0047] 1) Preparation of rare earth-doped magnesia partially stabilized zirconia micropowder: a) After mixing the monoclinic zirconia, fused magnesia fine powder, high alumina bauxite micropowder, praseodymium nitrate and lanthanum nitrate through wet ball milling Dry at 110°C for 50 minutes to obtain the precursor powder;

[0048] b) The precursor powder obtained in a) is placed at 770°C for 250 minutes, and air cooled to obtain a doped powder;

[0049] c) Soak the doped powder obtained in b) in distilled water for 5 minutes, filter the powder with filter paper, dry the powder at 110°C for 50 minutes, and pass through a 200-mesh sieve to obtain the rare earth-doped magnesium oxide part Stabilized zirconia powder;

[0050] 2) Mix the rare earth-doped magnesia partially stabilized zirconia micropowder obtained in 1) with de...

Embodiment 3

[0055] A preparation process of a spinel fiber reinforced zirconia refractory material, the preparation steps of the refractory material are as follows:

[0056] 1) Preparation of rare earth-doped magnesia partially stabilized zirconia micropowder: a) After mixing the monoclinic zirconia, fused magnesia fine powder, high alumina bauxite micropowder, praseodymium nitrate and lanthanum nitrate through wet ball milling Dry at 110°C for 45 minutes to obtain the precursor powder;

[0057] b) The precursor powder obtained in a) is placed at 750°C for 240 minutes, and air-cooled to obtain a doped powder;

[0058] c) Soak the doped powder obtained in b) in distilled water for 5 minutes, filter the powder with filter paper, dry the powder at 110°C for 45 minutes, and pass through a 200-mesh sieve to obtain the rare earth-doped magnesium oxide part Stabilized zirconia powder;

[0059] 2) Mix the rare earth-doped magnesia partially stabilized zirconia micropowder obtained in 1) with de...

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Abstract

The invention relates to a spinel fiber enhanced zirconia refractory material and a preparation technology thereof. A refractory brick is prepared from raw materials in percentage by weight as follows: 67%-73% of rare-earth-doped magnesium oxide partially stabilized zirconia, 10%-15% of dead burnt magnesite fine powder, 7%-12% of metal aluminum powder, 8%-10% of a binding agent, 0.8%-1.5% of a curing agent and 0.3%-0.5% of an additive. The product is safe and non-toxic and has no adverse effect on a user; the product has excellent properties such as good heat stability, thermal shock resistance, corrosion resistance, tensile resistance, high hardness, high toughness and the like, and is high in normal-temperature bending strength, compression strength and high-temperature bending strength; the enhancement principle is mainly characterized in that all phases are subjected to strengthened connection while thermal expansion coefficients mismatched between a monoclinic phase and a tetragonal phase of zirconia is adjusted by spinel fibers growing in the refractory material.

Description

technical field [0001] The invention relates to a refractory material, in particular to a spinel fiber reinforced zirconia refractory material with high refractoriness, excellent erosion resistance, good thermal shock resistance, good oxidation resistance and long service life and a preparation process thereof. Background technique [0002] The cycle temperature of the crucible used in the vacuum induction furnace is above 1500°C. This crucible is usually made of magnesia partially stabilized zirconia refractory materials. Such refractories on the market are basically fused magnesia partially stabilized oxidized materials. Zirconium aggregates and magnesia are partially stabilized zirconia fine grains, and the crucible thus prepared has severe thermomechanical properties after the crucible has been operated continuously for 9-90 times in the actual operation process due to the formation of the secondary phase of the molten aggregate. If the crucible falls, there will be hori...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/482C04B35/80
CPCC04B35/482C04B2235/3217C04B2235/3206C04B2235/3227C04B2235/3224C04B2235/443C04B2235/402C04B2235/48C04B2235/5224C04B2235/9607C04B2235/96
Inventor 胡宏平
Owner 山西同邦科技开发有限公司
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