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Preparation method of low-cost magnesium aluminate spinel transparent ceramic product
The invention discloses a preparation method of a low-cost magnesium aluminate spinel transparent ceramic. The preparation method is characterized by comprising the following steps of: preparing slurry from submicron high-purity magnesium aluminate spinel; obtaining granulating powder with different sphere diameters by using a spray drying granulation method; preparing a high-density biscuit by adry pressing, isostatic pressing or dry pressing and isostatic pressing forming method; sintering the high-density biscuit into a sintered body of which the relative density is greater than 99.9% by adopting an isothermal and isobaric double-control technology in a vacuum hot-pressing furnace; and carrying out heat treatment, double-sided rough grinding, fine grinding and polishing to obtain the high-density magnesium aluminate spinel transparent ceramic product. According to the invention, a high-temperature hot isostatic pressing process is not adopted, therefore, the method is more suitablefor large-size, large-batch and low-cost preparation of the magnesium aluminate spinel transparent ceramic product, and the prepared product has the characteristics of high density, high infrared-to-ultraviolet band transmittance of more than 80%, high strength, corrosion resistance and the like, and can be widely applied to the fields of radomes, various window materials and the like.
本发明公开了一种低成本镁铝尖晶石透明陶瓷的制备方法，其特征在于；将亚微米级高纯镁铝尖晶石制备成浆料；用喷雾干燥造粒方法获得不同球径的造粒粉；用干压、等静压或干压+等静压成型方法制备高密度的素坯；在真空热压炉中采用等温等压双控技术，将高密度的素坯烧结成相对密度大于99.9％以上的烧结体；再经热处理和双面粗、细磨、抛光后得到高致密度的镁铝尖晶石透明陶瓷制品。本发明由于不采用高温热等静压工艺，因此，更适合大尺寸、批量大、低成本制备镁铝尖晶石透明陶瓷制品，所制备的制品具有致密度高、红外到紫外波段透过率达80％以上、且强度好、抗腐蚀性等特点可用于天线罩、各种窗口材料等等领域得到广泛应用。
Preparation method of low-cost magnesium aluminate spinel transparent ceramic product
The invention discloses a preparation method of a low-cost magnesium aluminate spinel transparent ceramic. The preparation method is characterized by comprising the following steps of: preparing slurry from submicron high-purity magnesium aluminate spinel; obtaining granulating powder with different sphere diameters by using a spray drying granulation method; preparing a high-density biscuit by adry pressing, isostatic pressing or dry pressing and isostatic pressing forming method; sintering the high-density biscuit into a sintered body of which the relative density is greater than 99.9% by adopting an isothermal and isobaric double-control technology in a vacuum hot-pressing furnace; and carrying out heat treatment, double-sided rough grinding, fine grinding and polishing to obtain the high-density magnesium aluminate spinel transparent ceramic product. According to the invention, a high-temperature hot isostatic pressing process is not adopted, therefore, the method is more suitablefor large-size, large-batch and low-cost preparation of the magnesium aluminate spinel transparent ceramic product, and the prepared product has the characteristics of high density, high infrared-to-ultraviolet band transmittance of more than 80%, high strength, corrosion resistance and the like, and can be widely applied to the fields of radomes, various window materials and the like.
本发明公开了一种低成本镁铝尖晶石透明陶瓷的制备方法，其特征在于；将亚微米级高纯镁铝尖晶石制备成浆料；用喷雾干燥造粒方法获得不同球径的造粒粉；用干压、等静压或干压+等静压成型方法制备高密度的素坯；在真空热压炉中采用等温等压双控技术，将高密度的素坯烧结成相对密度大于99.9％以上的烧结体；再经热处理和双面粗、细磨、抛光后得到高致密度的镁铝尖晶石透明陶瓷制品。本发明由于不采用高温热等静压工艺，因此，更适合大尺寸、批量大、低成本制备镁铝尖晶石透明陶瓷制品，所制备的制品具有致密度高、红外到紫外波段透过率达80％以上、且强度好、抗腐蚀性等特点可用于天线罩、各种窗口材料等等领域得到广泛应用。
Preparation method of low-cost magnesium aluminate spinel transparent ceramic product
一种低成本镁铝尖晶石透明陶瓷制品的制备方法
TAN SHOUHONG (author) / LU XINGGEN (author) / ZHOU YONG (author) / WANG PENG (author)
2020-10-23
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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