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The properties of magnesium oxide

The properties of magnesium oxide

2022-09-23

Magnesium oxide is a basic oxide, with basic oxide connectivity, belongs to the cementitious material. White or off-white powder, odorless, tasteless, non-toxic, is a typical alkaline earth metal oxide, chemical formula MgO. The melting point is 2852℃, the boiling point is 3600℃, and the density is 3.58g/cm3 (25℃). Soluble in acid and ammonium salt solution, insoluble in alcohol. Solubility in water is 0.00062 g/100 mL (0 °C), 0.0086 g/100 mL (30 °C).

The main uses of iron oxide

The main uses of iron oxide

2022-09-23

Because of its special superparamagnetism, magnetic iron oxide particles have broad application prospects in giant magnetic resistance, magnetic liquid and magnetic recording, soft magnetic, permanent magnetic, magnetic cooling, giant magnetic impedance materials, magneto-optical devices, magnetic detectors and so on. Video tape commonly uses acicular iron or iron oxide magnetic ultramicron particles, and nano iron oxide is a new magnetic recording material. Soft ferrite has been widely used in radio communication, radio and television, automatic control, space navigation, radar navigation, measuring instruments, computers, printing, household appliances and biomedical fields.

Safety measures for zinc oxide

Safety measures for zinc oxide

2022-09-23

Health hazard: Zinc casting fever caused by inhalation of zinc oxide fume. Its symptoms include metallic taste in the mouth, thirst, dry throat, loss of appetite, chest tightness, dry cough, headache, dizziness, limb pain, high fever and aversion to cold. A large number of zinc oxide dust can block sebaceous glands and cause skin papules, eczema.

Toxicological data for zinc oxide

Toxicological data for zinc oxide

2022-09-23

Rats were intraperitoneally injected with LD50:240mg/kg. Poisonous. The victim may suffer from poor appetite, polydipsia, fatigue and other symptoms. In severe cases, interstitial lung edema and alveolar epithelial destruction may occur.

Application fields of zinc oxide

Application fields of zinc oxide

2022-09-23

mainly used in rubber or cable industry as reinforcing agent and active agent, also used as white glue colorant and filler, used as vulcanizing agent in neoprene rubber, etc

Sunscreen mechanism of zinc oxide

Sunscreen mechanism of zinc oxide

2022-09-23

Zinc oxide is an important and widely used physical sunscreen that shields ultraviolet rays by absorption and scattering. Zinc oxide is an N-type semiconductor, the valence band of electrons can accept the ultraviolet energy transition, which is how they absorb ultraviolet light. The function of scattering ultraviolet light is related to the particle size of the material. When the size is much smaller than the wavelength of ultraviolet light, the particle can scatter the ultraviolet light acting on it to all directions, so as to reduce the intensity of ultraviolet light in the irradiation direction. In addition, if the size of the raw material is too large, it will appear unnatural whitening on the skin. So nanoscale particles have significant advantages over normal size.

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