The hot qualitative couplet of vitriolic iron uses alkaline formula measure

Alkaline type is vitriolic iron Fe (OH) SO₄Can use at synthesizing ferric oxide grain. Ferric oxide grain can use the red that make reddish brown or brown dye commonly. Now ferric oxide also uses as nowadays magnetic storage medium, be like iron magnetic fluid. Iron magnetic fluid is contained exceed paramagnetic ferric oxide accept rice grain, can use as the radiography agent in nuclear magnetic resonance. The viscosity of iron magnetic fluid depends on magnetic field, this kind of function can make its apply at getting used to shock absorber oneself.

Test condition:

Temperature limits: RT…1000°C

Sample quality: 30.58mg

Rate-of-rise of air temperature: 20K/min

Test crucible: Pt

Test atmosphere: N₂, 70ml/min

Bracket type: S TG-DSC bracket

Test conclusion:

STA-MS test shows before 600°C, quality counts the ionic chroma change of 18 to mirror H₂O divides pace transgression. Between 600°C and 800°C, quality is counted 64 what count 32 report with quality is SO₂With O₂Aeriform transgression. Eventually child is Fe₂O₃(hematite) . Scale of weightlessness of corresponding Yi, the 2nd pace is 2.5% , 4.3% , total absorption of heat heats up enthalpy to be 246J/g. Scale of weightlessness of the 3rd pace is 45.5% , absorption of heat heats up enthalpy to be 1170J/g.