Oxidation calcium is alkalescent and fireproof the character of material

Oxidation is calcic (quality of CaO) opposite element 56. 1, true density 3. 75g/cm3, melting point is 2570 ℃ , belong to alkalescent and fireproof material. The brilliant shape structure that exists possibly has microtherm β model with high temperature α model. Mohs hardness 6 degrees, 0〜1700 ℃ : Coefficient of average linear expansion 13. ℃ of 8 X 10-6, the thermal conductance 7.71 W/(m of 1000 ℃•Resistor of K) 930 ℃ is led 4. Ω of 175 X IO-6•Cm, 1460 ℃ resistor rate are 9 Ω . Cm.

It is good that oxidation calcic goods has high temperature capability, fight alkalescent slag to erode wait for an advantage by force, but have very strong chemical reaction capacity with water or lunt. The grog of oxidation calcium and oxidation calcic goods are saved extremely hard below natural state. If grain of agglomeration oxidation calcic grog can be deposited only,make an appointment with IOOh, make go out wait for static suppress to taste can deposit more than days 10 only, be being produced and got on application very big limitation. The firebrick that although use calcium of electric frit oxidation,grain makings makes, pass processing of 1780 ℃ high temperature again, wrap again with waterproof and moistureproof polyethylene film, its deposit time to also can lengthen 3 ~4 only month.

Because oxidize,calcium and other oxide material have chemical reaction below high temperature, drop the melting point of oxidation calcium, promote the agglomeration action of oxidation calcic goods namely, still enhanced its to fight to hydrate ability at the same time.

(1) oxidation calcium and phasor of alumina n duality are like graph 5-24 place to show.

CaO-Al2O3 fastens binary phasor

(2) oxidation calcium and phasor of n duality of 2 oxidation silicon are like graph 5-25 place to show.

CaO-SiO2 fastens binary phasor

(2) oxidation calcium and phasor of titanium dioxide n duality are like graph 5-26 place to show.

CaO-TiO2 fastens binary phasor

See from afore-mentioned binary phasor:

(1) calcic aluminium fastens 12CaO of compound of low melting point•7A1203 melting point 1455 ℃ , low in all melting point 1395 ℃ .

(2) calcic silicon fastens CaO of compound of low melting point•SiO2, melting point 1544 ℃ , low in all melting point 1436 ℃ : .

(3) calcic titanium fastens 3Ca0 of compound of low melting point•2Ti02, melting point 1740 ℃ , low in all melting point 1475 ℃ .