Some things to know about basic zinc carbonate

Basic zinc carbonate is a fine white amorphous powder, odourless and tasteless, insoluble in water and alcohol, slightly soluble in ammonia, soluble in dilute acids and sodium hydroxide. It reacts with 30% H2O2, releasing CO2 and forming peroxides. Fluorescence can occur when heated at 250 to 500 for various times and cooled to room temperature. It has an infinite molecular formula and can show different crystal structures under x-ray diffraction conditions. The hydrolytic precipitation method is currently the more promising method for industrialisation, which prepares a homogeneous and dense product that is easy to filter and wash.

Compared to zinc oxide, alkaline zinc carbonate has a lower zinc content and works in conjunction with zinc oxide to activate the accelerator and speed up the vulcanisation process. But zinc carbonate has another characteristic: better transparency than zinc oxide, no whitening. It is generally used in the manufacture of translucent rubber products vulcanised with sulphur. Another feature of using zinc carbonate is that the hardness increases significantly. Zinc oxide not only speeds up the vulcanisation process, but also has a certain whitening and reinforcing effect. Zinc oxide is often used in colour mixing to improve the colour and can improve the ageing resistance of the vulcanised rubber and the thermal conductivity of the product.

Zinc oxide is an electronically structured semiconductor catalyst according to alkaline zinc carbonate manufacturers. Under light irradiation, when photons of a certain energy or photons with energy exceeding the band gap energy Eg of the semiconductor are injected into the semiconductor, electrons are excited from the valence band NB to the conduction band CB, leaving behind holes. The excited state of the conduction band electrons and valence band holes can be compounded, eliminating the input energy and heat. The electrons are captured in the surface state of the material and the valence band electrons jump to the conduction band. The valence band holes grab the hydroxyl electrons in the surroundings turning the hydroxyl groups into free radicals that can act as strong oxidants to degrade organic matter (or chlorine) and kill germs and viruses.

Differences between alkaline zinc carbonate and zinc oxide in rubber applications:

1. Relatively speaking, alkaline zinc carbonate contains less zinc and has a common effect with zinc oxide to activate the accelerator and speed up the vulcanisation process.

2. Another characteristic of alkaline zinc carbonate is that it has better transparency than zinc oxide, without whitening. It is generally used in the manufacture of translucent rubber products vulcanised with sulphur.

3. Another characteristic of using basic zinc carbonate is that the hardness increases significantly. Zinc oxide not only speeds up the vulcanisation process, but also has a certain whitening and reinforcing effect. Zinc oxide is often used in colour mixing to improve the colour, the ageing resistance of the vulcanised rubber and the thermal conductivity of the product.

These are some of the knowledge points about alkaline zinc carbonate, I hope you can seriously learn to understand the relevant knowledge, choose the right products and equipment for their needs, to ensure their own benefits, if you want to know more details, you can contact us, I believe we can definitely give you a satisfactory answer.