Preparation method of phosphate-reinforced zirconia fiber high-efficiency thermal-insulation composite material

A technology of zirconia fiber and composite materials, which is applied in the field of preparation of inorganic composite materials, can solve the problems of poor mechanical properties of heat insulation materials, poor mechanical properties of heat insulation tiles, and low strength of inorganic binders, and achieve easy implementation and production The effect of short cycle time and good high temperature stability

Inactive Publication Date: 2017-05-31
SHANDONG RES & DESIGN ACADEMY OF IND CERAMICS
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AI-Extracted Technical Summary

Problems solved by technology

[0003] Chinese Patent Publication No. CN101691138A discloses a preparation method of heat-insulating tiles, which mainly uses quartz fibers mixed with a small amount of alumina fibers and boron nitride powder to prepare low-temperature heat-insulating tiles, but the coating formula of the heat-insulating tiles disclosed in this patent has A large number of alkali metal ions limit its use temperature
Chinese Patent Publication No. CN102199042A discloses a method for preparing a lightweight rigid ceramic insulation tile. This patent also mainly uses quartz fiber and mullite fiber as the matrix, adding a small amo...
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Abstract

The invention relates to a preparation method of a phosphate-reinforced zirconia fiber high-efficiency thermal-insulation composite material, and belongs to the technical field of inorganic composite material preparation. The preparation method comprises following steps: 1, pretreatment of zirconia fiber; 2, preparation of a phosphate binder; 3, preparation of a thermal-insulation composite material molding slurry; 4, pumping filtration moulding; and 5, heat treatment. Operation of the preparation method is simple; the obtained target product can be used at 1500 DEG C for a long term; intensity is low; high temperature stability is high; and the mechanical properties of the obtained phosphate-reinforced zirconia fiber high-efficiency thermal-insulation composite material are improved greatly.

Technology Topic

PhosphateCalcium Binder +11

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  • Preparation method of phosphate-reinforced zirconia fiber high-efficiency thermal-insulation composite material
  • Preparation method of phosphate-reinforced zirconia fiber high-efficiency thermal-insulation composite material

Examples

  • Experimental program(6)

Example Embodiment

[0031] Example 1
[0032] Weigh 2000gLaCl 3 ·6H 2 O, add to 10000g deionized water, stir until the powder is completely dissolved, add 1000gH 3 PO 4 , Stir with a micro stirrer for 30 minutes, and let it stand for 12 hours after the solution is evenly mixed. Mix the chopped zirconia fiber (average length 30μm), the binder lanthanum phosphate solution with 200% of the zirconia fiber mass, and the deionized water with 3000% of the zirconia fiber mass, and stir for 40 minutes with a micro stirrer to make the fiber Slurry. The vacuum degree of the vacuum tank is maintained at -0.1MPa, the slurry is added to the mold for collection, the vacuum filtration treatment time is 10 minutes, and the vacuum filtration is formed into a wet green. The wet billet is placed in a constant temperature drying box, and the drying process is 70°C for 12 hours and 140°C for 4 hours. After drying, the wet billet is placed in a high-temperature sintering furnace and fired at 1500°C under normal pressure. The temperature is kept for 2 hours and cooled to room temperature. The resulting composite material has a density of 0.43g/cm 3 , The compressive strength is 0.4MPa, and the thermal conductivity is 0.134W/m·K at 1100°C.

Example Embodiment

[0033] Example 2
[0034] Weigh 2000gLaCl 3 ·6H 2 O, add to 10000g deionized water, stir until the powder is completely dissolved, add 1000gH 3 PO 4 , Stir with a micro stirrer for 30 minutes, and let it stand for 12 hours after the solution is evenly mixed. Mix the chopped zirconia fiber (average length 150μm), the binder lanthanum phosphate solution with 500% of the zirconia fiber mass, and the deionized water with 2500% of the zirconia fiber mass, and stir for 40 minutes with a micro stirrer to make the fiber Slurry. The vacuum degree of the vacuum tank is kept at -0.06MPa, the slurry is added to the mold for collection, the vacuum filtration treatment time is 10 minutes, and the vacuum filtration is formed into a wet green. The wet billet is placed in a constant temperature drying box, and the drying process is 50°C for 24 hours and 140°C for 4 hours. After drying, the wet billet is placed in a high-temperature sintering furnace and fired at 1500°C under normal pressure. The temperature is kept for 2 hours and cooled to room temperature. The density of the obtained composite material is 0.47g/cm. 3 , Compressive strength 0.7MPa, 1100℃ thermal conductivity 0.141W/m·K.

Example Embodiment

[0035] Example 3
[0036] Weigh 2500gLaCl 3 ·6H 2 O, add to 10000g deionized water, stir until the powder is completely dissolved, add 1000gH 3 PO 4 , Stir with a micro stirrer for 30 minutes, and let it stand for 12 hours after the solution is evenly mixed. Mix the chopped zirconia fiber (average length 30μm), the binder lanthanum phosphate solution with 100% zirconia fiber mass, and 3000% deionized water with zirconia fiber mass, and stir for 40 minutes with a micro stirrer to make fiber Slurry. The vacuum degree of the vacuum tank is kept at -0.05MPa, the slurry is added to the mold for collection, the vacuum filtration treatment time is 10 minutes, and the vacuum filtration is formed into a wet green. The wet billet is placed in a constant temperature drying box, and the drying process is 70°C for 12 hours and 140°C for 4 hours. After drying, the wet billet is placed in a high-temperature sintering furnace and fired at 1550°C under normal pressure, and kept for 5 hours to cool to room temperature. The resulting composite material has a density of 0.44g/cm 3 , The compressive strength is 0.47MPa, and the thermal conductivity is 0.138W/m·K at 1100°C.

PUM

PropertyMeasurementUnit
Density0.43g/cm³
Compressive strength0.4mPa
Thermal conductivity0.134W·k/m

Description & Claims & Application Information

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