Improved zirconium oxide fiber plate and preparation method thereof

A zirconia fiber and zirconia technology, which is applied in the field of improved zirconia fiberboard products, can solve the problems of powder dropping, low strength, and the influence of thermal conductivity without consideration

Inactive Publication Date: 2019-02-12
南京理工宇龙新材料科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The densities of zirconia fiberboards prepared so far are all ≥1.0g/cm 3 , Zirconium sol is often used as a binder, which has

Method used

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  • Improved zirconium oxide fiber plate and preparation method thereof
  • Improved zirconium oxide fiber plate and preparation method thereof
  • Improved zirconium oxide fiber plate and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Prepared chopped zirconia fibers, alkaline silica sol (SiO 2 ≥30wt.%), zircon, rutile titanium dioxide (average particle size 1 μm), and potassium hexatitanate whiskers (length 50-200 μm).

[0027] Weigh 140g of zirconia fiber, 250g of alkaline silica sol, 28g of titanium dioxide and 250g of water in a container, and fully stir and disperse with an electric mixer to obtain a slurry. Pour the slurry into the mold, vacuum filter and pressurize the surface with 0.2MPa, and get the wet fiberboard blank after demoulding. Put the wet blank into a blast drying oven at 100°C for 10 hours, then put it into a high-temperature muffle furnace to raise the temperature to 1300°C at 3°C / min, and keep it warm for 2 hours to obtain a zirconia fiber board, as shown in figure 1 shown.

[0028] After testing, the room temperature compressive strength of the prepared alumina fiberboard is 3.1MPa, and the density is about 0.63g / cm 3 , Reburning line shrinkage ≤ 1%. When the sample size i...

Embodiment 2

[0030] Weigh 140g of zirconia fiber, 250g of alkaline silica sol, 28g of zircon powder and 250g of water in a container, and fully stir and disperse with an electric mixer to obtain a slurry. Pour the slurry into the mold, vacuum filter and pressurize the surface with 0.2MPa, and get the wet fiberboard blank after demoulding. Put the wet blank into a blast drying oven at 100°C for 10 hours, then put it into a high-temperature muffle furnace to raise the temperature to 1200°C at 3°C / min, and keep it warm for 2 hours to obtain a zirconia fiber board.

[0031] After testing, the room temperature compressive strength of the prepared alumina fiberboard is 5.0MPa, and the density is about 0.8g / cm 3 , Reburning line shrinkage ≤ 1%. When the sample size is 1cm thick, in steady state, the hot surface temperature is 1000°C, the cold surface temperature is about 300°C, the hot surface temperature is 1200°C, the cold surface temperature is about 330°C, and there is no powder falling phen...

Embodiment 3

[0033] Weigh 120g of zirconia fiber, 250g of alkaline silica sol, 12g of potassium hexatitanate and 250g of water into a container, and fully stir and disperse with an electric mixer to obtain a slurry. Pour the slurry into the mold, vacuum filter and pressurize the surface with 0.25MPa, and get the wet fiberboard blank after demoulding. Put the wet billet into a blast drying oven at 95°C for 12 hours, then put it into a high-temperature muffle furnace to raise the temperature to 1200°C at 3°C / min, and keep it warm for 2 hours to obtain a zirconia fiber board.

[0034] After testing, the room temperature compressive strength of the prepared alumina fiberboard is about 4.3MPa, and the density is about 0.75g / cm 3 , Reburning line shrinkage ≤ 1%. When the sample size is 1cm thick, in steady state, the hot surface temperature is 1000°C, the cold surface temperature is about 290°C, the hot surface temperature is 1200°C, the cold surface temperature is about 320°C, and there is no ...

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Abstract

The invention discloses an improved zirconium oxide fiber plate, which is characterized in that on the basis of the existing fiber plate preparation process, through the addition of inorganic bondingagents and infrared light-screening agents, the zirconium oxide fiber plate with high pressure-resistant intensity and low high-temperature heat conduction rate can be prepared, wherein the inorganicbonding agent is mainly basic silicon sol; the infrared light-screening agent is mainly rutile type titanium dioxide or potassium hexatitanate whiskers. The density of the prepared zirconium oxide fiber plate is 0.6 to 0.8 g/cm<3>; the room temperature pressure-resistant intensity is 3.0 to 5.0 MPa; when the thickness of the sample is 1 cm, in the stable state, the hot surface temperature is 1000DEG C; the cold surface temperature is 270 to 300 DEG C; the hot surface temperature is 1200 DEG C; the cold surface temperature is 310 to 330 DEG C.

Description

technical field [0001] The invention belongs to the field of thermal insulation materials, and in particular relates to an improved zirconia fiberboard product. Background technique [0002] Zirconia (ZrO 2 ) fiber is a lightweight polycrystalline fiber material with excellent heat resistance and heat insulation performance. The long-term use temperature can reach 2200 °C, and the short-term maximum use temperature can reach 2300 °C. The coefficient is the lowest, the heat insulation performance is the best, and the high temperature performance is stable, non-volatile, and pollution-free, so ZrO 2 Fiber and its products (such as fiberboard, fiber cloth, fiber felt, etc.) have broad application prospects in aerospace, metallurgy, petrochemical and other industries. ZrO 2 The fiber is mainly used in the ultra-high temperature insulation layer in the space shuttle, the reinforcement of the ceramic matrix composite material, etc.; ZrO 2 Fiberboard is mainly used as the heart...

Claims

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Application Information

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IPC IPC(8): C04B35/80
CPCC04B35/803C04B2235/3232C04B2235/3418C04B2235/3427C04B2235/5236C04B2235/5276C04B2235/77C04B2235/96C04B2235/9615
Inventor 戴生伢张引钱松根黄振进陈福金
Owner 南京理工宇龙新材料科技股份有限公司
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