High-bending-strength quartz-based expendable pattern paint modified by mica powder and preparation method of high-bending-strength quartz-based expendable pattern paint
A mica powder and lost foam technology, applied in coatings, manufacturing tools, casting and molding equipment, etc., can solve the problems of uneven peeling performance, uneven bending strength, affecting gas discharge, etc., and achieve improved dispersion stability and improved Smoothness, effect of reducing porosity in castings
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[0014] A high flexural strength mica powder modified quartz-based lost foam coating, made of the following raw materials in parts by weight (kg): quartz powder 100, modified starch 0.9, carboxymethyl cellulose 0.9, sodium bentonite 2.4, mica powder 0.9, tetraacicular zinc oxide whiskers 0.8, silica sol 0.9, ethanol 10, water, carbon nanotubes 0.8, bauxite 2.3, nano polytetrafluoroethylene 0.2.
[0015] The preparation method of described high flexural strength mica powder modified quartz-based lost foam coating comprises the following steps:
[0016] (1) Add silica sol to ethanol, stir evenly, then add mica powder and stir evenly, heat to 60°C, add four needle-shaped zinc oxide whiskers while stirring, heat to 70°C, ultrasonically disperse for 3 minutes, continue stirring until After ethanol volatilization is completed, pulverize and pass through a 100-mesh sieve to obtain modified mica powder;
[0017] (2) Mix and grind carbon nanotubes, bauxite, and nano-polytetrafluoroethy...
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