The invention discloses a water-based environment-friendly white
glaze for high-reflection anti-PID photovoltaic backboard glass and a preparation method and application of the water-based environment-friendly white
glaze. The water-based environment-friendly white
glaze is composed of
varnish, a dispersing agent, low-melting-point glass
powder,
titanium dioxide, a flatting agent and a defoaming agent, and the water-based environment-friendly white glaze has the
high reflectivity (larger than or equal to 78%) on visible light and resists PID (potential-induced degration). The
softening temperature of the low-melting-point glass
powder is 450-550 DEG C, the total
melting temperature of the low-melting-point glass
powder is 520-560 DEG C, so that the water-based environment-friendly white glaze is completely molten within a short time within the
tempering temperature range of 600-720 DEG C, the
linear expansion coefficient of the low-melting-point glass powder is 80-85 * 10 <-7 > / K (30-300 DEG C) and is close to that of matrix glass, and the stress between the low-melting-point glass powder and the matrix glass is close in the cooling process; and the
adhesive force of a glaze layer and the dimensional stability of glazed glass are ensured. The
titanium dioxide is prepared through a chlorination method, the
impurity content is extremely low,
silicon oxide and aluminum
oxide are used for
coating treatment,
lattice defects caused by
titanium dioxide under the
ultraviolet irradiation condition can be blocked,
light activation points on the surface of
titanium dioxide can be shielded, and the PID resistance is improved.