Preparation method of low-cost high-alumina ceramic thin plate

Abstract

The invention relates to a preparation method of a low-cost high-alumina ceramic thin plate. The preparation method of the low-cost high-alumina ceramic thin plate is characterized by including the steps: 1) raw material treatment; 2) raw material proportioning and mixing: weighing raw materials including, in weight percent, 10%-25% of coal series kaolinite, 10%-25% of calcined bauxite, 20%-30% ofcommon kaolinite, 15%-25% of feldspar, 0-5% of talcum and 18%-25% of quartz to obtain a blank; adding reinforcing agents equivalently accounting for 0.1%-0.25% of the total weight of the blank, performing ball milling for 12-18 hours and uniformly mixing the raw materials to obtain mixed materials; 3) pelleting and aging; 4) semi-dry pressing; 5) drying; 6) glazing; 7) sintering to obtain the low-cost high-alumina ceramic thin plate. The feldspar is formed by mixing potassium feldspar with soda feldspar, and the weight ratio of K2O to Na2O of the mixed feldspar chemical composition is 2:1. The sintering temperature of the high-alumina ceramic thin plate prepared by the method is only 1180 DEG C, so that the ceramic thin plate is low in cost and high in strength.

Description

technical field [0001] The invention relates to a preparation method of a low-cost high-alumina ceramic thin plate, which is mainly used as a building interior wall, an exterior wall decoration plate, etc., and belongs to the field of building ceramics. Background technique [0002] Ceramic thin plate is a new type of green, energy-saving and environmentally friendly architectural ceramics, which can be 2 o 3 The content is divided into high aluminum (Al 2 o 3 ≥28%) and high silicon (SiO 2 ≥60%, Al 2 o 3 <28%) two categories. Compared with high-silicon ceramic sheets, high-alumina ceramic sheets have the advantages of high strength, good corrosion resistance, and not easy to crack. However, industrial alumina is generally added to the formula of high-alumina ceramic sheet blanks, which leads to high costs and limits the application of ceramic sheets. [0003] Chinese invention patent "A Method for Manufacturing Large Silicon Oxide Ceramic Sheets" (CN201110039459.9...

AI Technical Summary

Problems solved by technology

However, industrial alumina is generally added to the formula of high-alumina ceramic sheet blanks, resulting in high costs and limiting the application of ceramic sheets

[0003] Chinese invention patent "A Method for Manufacturing Large Silicon Oxide Ceramic Sheets" (CN201110039459.9) prepared high-silicon ceramic sheets with a fracture strength of only 45-50 MPa; "(Zhou Jianer et al. Journal of Ceramics, 2006, 27(3): 243-249.) A high-alumina ceramic sheet was prepared at 1240°C by adding 30% industrial alumina micropowder, with a strength of 143MPa and a high cost; Chinese invention patent "A method of using coal gangue and potassium feldspar to prepare ceramic thin plates and ceramic thin plates prepared by this method" (CN201610214106.0) Prepare ceramic thin plates by adding coal gangue, the strength reaches 70.29MPa, and the firing temperature is 1270 ℃; "Processing and properties of large-sized ceramic slabs" (Raimondo, Dondi, et al. Boletín De La Sociedad De Cerámica Y Vidrio, 2010,49(4):289-295.) prepared a large-scale ceramic sheet with a flexural strength of 78MPa and a firing temperature of 1220°C; Chinese invention patent "A Quartz Placer Tailings or Silica Placer Tailings-based high-strength ceramic plate and its preparation method” (CN104496438A) uses quartz sand tailings and other raw materials to prepare ceramic thin plates. Although the firing temperature is 900 ° C, the flexural strength is only 32-37 MPa

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