Preparation method of zirconium oxide-forsterite composite material with high strength and density

A technology of forsterite and composite materials, which is applied in the field of refractory materials, can solve problems affecting the application of forsterite, poor high-temperature performance of finished products, complicated preparation methods, etc., and achieve the effects of being conducive to industrial promotion, high refractoriness, and stable volume

Active Publication Date: 2018-01-05
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the preparation method is complex, inefficient, and the high-temperature performance of the finished product is poor, which seriously affects the application of forsterite

Method used

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  • Preparation method of zirconium oxide-forsterite composite material with high strength and density

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] (1) After fully crushing the magnesite, calcining at 750°C for 2 hours to obtain light-burned magnesia powder;

[0036] (2) Evenly mix light-burned magnesia and zircon by mass fraction 40%, 60%, and dry-mill in a ball mill for 10 hours;

[0037] (3) The raw material through ball milling is made into a green body under pressure at 150MPa for 5min;

[0038] (4) The green body is kept at 1300°C for 6 hours, and then cooled with the furnace to obtain the final product.

[0039] The performance parameters of the prepared zirconia-forsterite composite material are as follows: the apparent porosity is 14%, and the bulk density is 3.2 g cm -3 , The room temperature compressive strength is 163MPa.

Embodiment 2

[0041] (1) After fully crushing the magnesite, calcining at 750°C for 2 hours to obtain light-burned magnesia powder;

[0042] (2) Mixing light-burned magnesia and zircon by mass fraction 45%, 55%, dry grinding in a ball mill for 10h;

[0043] (3) The raw material through ball milling is made into a green body under pressure at 100MPa for 5min;

[0044] (4) The green body is kept at 1400°C for 4 hours, and then cooled with the furnace to obtain the final product.

[0045] The performance parameters of the prepared zirconia-forsterite composite material are as follows: the apparent porosity is 6%, and the bulk density is 3.7g cm -3 , The room temperature compressive strength is 188MPa.

Embodiment 3

[0047] (1) After the magnesite is fully crushed, it is calcined at 750°C for 2 hours to obtain lightly calcined magnesium oxide powder;

[0048] (2) Mixing light-burned magnesia and zircon by mass fraction 45%, 55%, dry grinding in a ball mill for 10h;

[0049] (3) The raw material through ball milling is made into a green body under pressure at 100MPa for 5min;

[0050] (4) The green body is kept at 1600°C for 4 hours, and the product is obtained by cooling with the furnace.

[0051] The performance parameters of the prepared zirconia-forsterite composite material are as follows: the apparent porosity is 3%, and the bulk density is 3.8 g cm -3 , The room temperature compressive strength is 245MPa.

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Abstract

The invention aims at problems existed in forsterite, and provides a preparation method of a zirconium oxide-forsterite composite material with high strength and density. Magnesite and a zirconium oxide are used as raw materials, a solid-phase reaction sintering process is used for preparing the zirconium oxide-forsterite composite material with high strength and density by one step, and the technical scheme mainly comprises pretreatment of magnesite, mixing of materials, moulding, and sintering. The raw material MgO has effects for stabilizing zirconium oxide, and the zirconium oxide materialshows optimum performance; introduced zirconium oxide improves strength and density of forsterite, process design is reasonable and flow is convenient, and the method benefits for industrialization and development and application to other fields.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a preparation method of a high-strength and dense zirconia-forsterite composite material. Background technique [0002] Forsterite is a high-quality refractory material with high melting point, low thermal conductivity, high refractoriness and good chemical stability. Fluxes, slag regulators, ironmaking sinter additives are beneficial to improve product quality. my country is rich in forsterite resources, and the ore grade is high, which is of great development value. However, natural forsterite often contains some harmful impurities, such as fayalite, because of its low melting point (1205°C), it will affect the high temperature performance of forsterite. [0003] Zirconia has high melting point, high strength, corrosion resistance and good thermal conductivity. It can be used as an excellent high-temperature material, aerospace equipment, human implan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/66C04B35/04C04B35/48C04B35/622C04B35/64
Inventor 马北越任鑫明苏畅袁磊于景坤
Owner NORTHEASTERN UNIV
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