A functional composite zirconia refractory product and preparation method thereof

A technology for refractory products and zirconia, applied in the field of refractory materials, can solve the problems of reducing the purity and service temperature of the products, polluting the furnace body and crystals of the crystal growth furnace, etc., and achieves good structural stability, long service life and thermal conductivity of products. low effect

Active Publication Date: 2016-06-29
SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] When zirconia refractory products are formed, a binder is added. In the prior art, inorganic binders such as lignosulfonate, phosphate or sulfate are often used as binders. After the inorganic binder is fired, a large amount of Fe remains. 2 o 3 、K 2 O, Na 2 O, TiO 2 , SiO 2 ,P 2 o 5 and other impurities, which seriously reduce the purity and service temperature of the product, and pollute the crystal growth furnace body and crystal

Method used

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  • A functional composite zirconia refractory product and preparation method thereof
  • A functional composite zirconia refractory product and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0033] Embodiment 1: Using the process and scheme described in the present invention, the electrofusion Y with a particle size of 0.15 to 3.5 mm 2 o 3 Stabilized zirconia particles 60%; fused Y with a particle size of 1-50 μm 2 o 3 Stabilized zirconia fine powder 35%; fused Y 2 o 3 5% of granulated material prepared by stabilized zirconia micropowder; water-based resin solution is used as binder, and the binder is 3.0% of the total mass of the whole raw material (additional); the above raw materials are mixed and sieved and put into a closed trough for trapping After 12 hours, put it into a mold and press it into an embryo body, dry it at 120°C, and fire it at a high temperature of 1900°C to get a functional composite zirconia refractory product.

Embodiment 2

[0034] Embodiment 2: Using the process and scheme described in the present invention, the electrofusion Y with a particle size of 0.15 to 3.5 mm 2 o 3 Stabilized zirconia particles 54%; fused Y with a particle size of 1-50 μm 2 o 3 Stabilized zirconia fine powder 33%; fused Y 2 o 3 13% of granulated material prepared by stabilized zirconia micropowder; polyvinyl alcohol solution is used as a binder, and the binder is 4.5% of the total mass of the raw materials (additional); the above raw materials are mixed and sieved and put into a closed trough Made for 24 hours, put into the mold to vibrate and press to form an embryo body, dry at 60°C, and fire at a high temperature of 1850°C to obtain a functional composite zirconia refractory product.

Embodiment 3

[0035] Embodiment 3: Using the process and scheme described in the present invention, the electrofusion Y with a particle size of 0.15 to 3.5 mm 2 o 3 Stabilized zirconia particles account for 45% of the total mass of the raw materials; fused Y with a particle size of 1-50 μm 2 o 3 Stabilized zirconia fine powder accounts for 35% of the total mass of the raw materials; electrofusion Y 2 o 3 The granulated material prepared by stabilized zirconia micropowder accounts for 20% of the total mass of the raw materials; the phenolic resin solution is used as the binder, and the binder is 5% of the total mass of the raw materials (additional); the above raw materials are mixed and sieved and placed in a closed Trapped in the trough for 18 hours, put into the mold to vibrate and press to form an embryo body, dry at 180°C, and fire at a high temperature of 2000°C to obtain a functional composite zirconia refractory product.

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Abstract

The invention belongs to the technical field of refractory materials, and specifically relates to a functional composite zirconium oxide refractory product and a preparation method thereof. According to the provided functional composite zirconium oxide refractory product, the zirconium oxide refractory product is a key refractory material of a super high temperature gem crystal growth furnace. The zirconium oxide refractory product is characterized by being prepared from the following raw materials by mass percent: 45-60% of fused-stable zirconium oxide granules, 25-40% of fused stable zirconium oxide fine powder and 5-20% of zirconium oxide granulation material; the total dosage of the zirconium oxide refractory product is 100%, and an organic binder is added; the zirconium oxide granulation material is prepared from fused-stable zirconium oxide micro powder by spray granulation; the content of ZrO2, HfO2 and the stabilizer in the zirconium oxide refractory product is not smaller than 99.0%. The functional composite zirconium oxide refractory product provided by the invention has the characteristics of high temperature resistance, high strength, good high temperature stability, strong penetration resistance, low thermal conductivity and good thermal insulation effect.

Description

technical field [0001] The invention belongs to the technical field of refractory materials, and in particular relates to a functional composite zirconia refractory product and a preparation method thereof. Background technique [0002] Gem crystal growth furnaces use high temperature and vacuum inside the furnace, which requires extremely high purity. In addition to the usual performance of heat insulation materials, it also requires low volatility and extremely strict control of pollutants. Therefore, it is required that the thermal insulation materials for crystal growth furnaces should have: 1) high temperature resistance, and can be used for a long time in an ultra-high temperature environment above 2000 °C; 2) high strength, no cracking, no falling off and no pulverization under high temperature environments; 3) Good high temperature stability, no reaction with the volatile matter in the furnace, no pollution to the crystal; 4) Low opening porosity, strong resistance t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B38/06
Inventor 谭清华孙红刚耿可明冯志源闫双志胡飘石鹏坤
Owner SINOSTEEL LUOYANG INST OF REFRACTORIES RES
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