Chemical Properties
(Solid) Weight ratio Si O
2
:K
2
O varies
with grade from 2.1:1 to 2.5:1; colorless anhydrous
lump, shattered or granular. Soluble in water at
high temperature and pressure; insoluble in alco-
hol. (Solution) Colorless liquid, B′e range 29–48
degrees.
Uses
As binder (e.g., in carbon electrodes, lead pencils, protective coatings, insoluble pigments); detergent, in glass and ceramics manufacture.
Uses
Potassium silicate is used in binders, carbon electrodes, lead pencils, protective coatings, insoluble pigments, phosphors on television tubes and detergent additives. It acts as a catalyst to make glass, ceramics, welding rods, adhesives, cements, gels, paints, pulp and paper production. Further, it is used in horticulture as a soluble source of potassium and silicon. It acts as a corrosion inhibitor.
Production Methods
Potassium silicate is produced commercially by fusing silica with potassium carbonate or potassium hydroxide at high temperatures in furnaces. This reaction yields a glass-like solid that is then dissolved in water under controlled conditions to form liquid potassium silicate solutions of varying concentrations.
Flammability and Explosibility
Not classified
Mechanism of action
Strengthens plant cell walls creating a physical barrier against pests and diseases. Triggers plants immune system. Coats leaf surfaces inhibiting fungal spore germination
Pesticide Type
Insecticide; Fungicide
