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Method for preparing zirconium oxide fiber board

A technology of zirconia fiber and zirconium oxychloride, which is applied in the field of refractory materials, can solve the problems of insufficient strength of zirconia fiber base material, lower high temperature refractory performance of fiberboard, and unsatisfactory binder, etc., and achieve high bond strength , Excellent bonding performance at room temperature, good overall mechanical properties

Active Publication Date: 2010-08-04
山东红阳高温节能材料股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Although the zirconia fiberboard produced by Zircar can be used at temperatures as high as 1600 °C and has excellent performance, its preparation technology may still have some deficiencies in some details: first, the strength of the zirconia fiber substrate used is not high enough. Zirconia fiber is prepared by impregnation method, that is, soaking the organic fiber fabric in the zirconium salt solution, absorbing it, taking it out and drying it and calcining it. Since it is the residue obtained after the organic skeleton is calcined, there are many defects in the fiber structure. , the strength is not as high as the zirconia fiber obtained by the colloidal method; secondly, the binder used is not very ideal, and one of the boards may use zirconium acetate sol as the binder, which has general adhesion and large thermal decomposition shrinkage; and Another type of board uses silica sol as a binder, which will introduce impurities such as silicon oxide, which will reduce the high-temperature fire resistance of the fiberboard.

Method used

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  • Method for preparing zirconium oxide fiber board

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Experimental program
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Effect test

Embodiment 1

[0028] (1) Preparation of inorganic zirconium adhesive: according to the composition ratio requirements of tetragonal zirconia (molar ratio ZrO 2 : Y 2 o 3 =97:3), weigh 100Kg zirconium oxychloride (ZrOCl 2 ·8H 2 O, molecular weight 322.25, purity > 99.5%) and 5.82Kg yttrium trichloride (YCl 3 ·6H 2 (2, molecular weight 303.36, purity > 99.9%); In addition, according to the molar ratio, zirconium oxychloride: the ratio of hydrogen peroxide=1: 4.5, measure 143L mass percent concentration and be 30% aqueous hydrogen peroxide (H 2 o 2 / H 2 O, analytically pure); under stirring and pumping conditions, hydrogen peroxide aqueous solution was mixed with zirconium oxychloride and yttrium trichloride, reacted and accompanied by chlorine gas release, after the reaction was completed, the resulting solution was heated to 70 ℃ to carry out vacuum distillation to remove excess water until an inorganic zirconium adhesive with a viscosity of about 30mPa·s is obtained;

[0029] (2) Pu...

Embodiment 2

[0032] (1) Preparation of inorganic zirconium adhesive: according to the composition ratio requirements of tetragonal zirconia (molar ratio ZrO 2 : Y 2 o 3 =97:3), weigh 100Kg zirconium oxychloride (ZrOCl 2 ·8H 2 O, molecular weight 322.25, purity > 99.5%) and 7.35Kg yttrium nitrate (Y(NO 3 ) 3 ·6H 2 (2, molecular weight 383.01, purity > 99.9%); In addition, according to the molar ratio of zirconium oxychloride: the ratio of hydrogen peroxide=1: 4, measure 127L mass percent concentration and be 30% hydrogen peroxide aqueous solution (H 2 o 2 / H 2 O, analytically pure); under the conditions of stirring and pumping, the aqueous hydrogen peroxide solution was mixed with zirconium oxychloride and yttrium nitrate, and the reaction occurred accompanied by the release of chlorine gas. After the reaction was completed, the resulting solution was heated to 65°C for Distill under reduced pressure to remove excess water until the inorganic zirconium adhesive with a viscosity of a...

Embodiment 3

[0036] (1) Preparation of inorganic zirconium adhesive: according to the composition ratio requirements of cubic phase zirconia (molar ratio ZrO 2 : Y 2 o 3 =92:8), weigh 100Kg zirconium oxychloride (ZrOCl 2 ·8H 2 O, molecular weight 322.25, purity > 99.5%) and 16.37Kg yttrium trichloride (YCl 3 ·6H 2 (2, molecular weight 303.36, purity > 99.9%); In addition, according to the molar ratio of zirconium oxychloride: the ratio of hydrogen peroxide=1: 5.5, measure 174L mass percent concentration and be 30% aqueous hydrogen peroxide (H 2 o 2 / H 2 O, analytically pure); under stirring and pumping conditions, hydrogen peroxide aqueous solution was mixed with zirconium oxychloride and yttrium trichloride, reacted and accompanied by the release of chlorine gas, after the reaction was completed, the resulting solution was warmed up to 80 ℃ to carry out vacuum distillation to remove excess water until an inorganic zirconium adhesive with a viscosity of about 50mPa·s is obtained;

...

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Abstract

The invention discloses a method for preparing zirconia fiber plate with the 'inorganic zirconium glue bonding + vacuum molding method'. With high-intensity zirconia fiber as the base material and inorganic zirconium glue synthesized in the method of the invention as the adhesive, the invention prepares them into slurry, which is molded into green bodies through vacuum filtration. After going through the drying and high-temperature treatment, the green bodies are produced into zirconia fiber plate. The method for preparing zirconia fiber plate mainly comprises the following three steps of: preparing the inorganic zirconium glue, slurrying preparation and vacuum molding and drying and high-temperature treatment, thereby obtaining the tetragonal phase / or cubic phase zirconia fiber plate with a purity of more than 90 percent, a compressive strength of 0.5MPa to 5.0MPa, a capacity of 300kg / m<3> to 1,200kg / m<3>, and a service temperature of 1,600DEG C to 2,200 DEG C.

Description

(1) Technical field [0001] The invention relates to a preparation method of a zirconia fiberboard, which belongs to the field of refractory materials. (2) Background technology [0002] Refractory fiberboard is one of the deep-processed products of refractory fiber. It is a rigid and low thermal conductivity refractory fiber product. It not only maintains the excellent characteristics of fibrous high-temperature insulation materials, but also has excellent mechanical properties and precise geometric dimensions. , can be used not only as the backing material of the furnace wall, but also directly as the hot surface material of the furnace wall. It is widely used in fields that require toughness, self-supporting and heat insulation at the same time. [0003] Refractory fiberboard is usually produced by wet vacuum forming process, that is, the corresponding refractory fiber loose cotton is selected as the base material, the fiber is chopped, and organic binders, inorganic binde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66
Inventor 刘和义孙启宝张敏
Owner 山东红阳高温节能材料股份有限公司
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