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分子式：MgO
分子量：40.30
物化性質(zhì)：氧化鎂為白色無定形粉末。無臭、無味、無毒。相對密度約3.58（25℃）。熔點2852℃，沸點3600℃.難溶于水，不溶于醇，溶于酸或銨鹽溶液中。經(jīng)1000℃以上高溫灼燒，可轉(zhuǎn)化為晶體。溫度升高至1500℃以上時，則成死燒氧化鎂或燒結(jié)氧化鎂。遇空氣中二氧化碳生成堿式碳酸鎂。
用途：工業(yè)氧化鎂可用于制造陶瓷、搪瓷、耐火坩堝和耐火磚做為磨光劑、粘合劑。也可做油漆及紙張的填料，氯丁橡膠中做促進劑與活化劑。與氯化鎂等溶液混合可制氧化鎂水泥。醫(yī)藥上用作抗酸劑與輕瀉劑，用于胃酸過多，胃和十二指腸潰瘍病。也應(yīng)用于玻璃、染料、酚醛塑料等。食品級氧化鎂用作砂磄精制時的脫色劑、冰淇淋粉的pH調(diào)節(jié)等。
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|
氧化鎂MgO≥% |
95 |
93 |
95 |
93 |
99.5 |
|
氧化鈣 |
0.2 |
0.5 |
1.0 |
1.5 |
0.08 |
|
氯化物≤% |
0.5 |
0.5 |
0.07 |
0.2 |
--- |
|
總氮量≤% |
--- |
--- |
--- |
--- |
--- |
|
燒失量≤% |
2 |
3 |
3.5 |
5.0 |
0.25 |
|
鐵≤% |
0.05 |
0.08 |
0.05 |
0.06 |
0.007 |
|
鈣≤% |
--- |
--- |
--- |
--- |
--- |
|
錳ppm≤% |
0.01 |
0.01 |
0.003 |
0.01 |
0.003 |
|
砷ppm |
--- |
--- |
--- |
--- |
--- |
|
鉀≤% |
--- |
--- |
--- |
--- |
--- |
|
鈉≤% |
--- |
--- |
--- |
--- |
--- |
|
鋅≤% |
--- |
--- |
--- |
--- |
--- |
|
鋇≤% |
--- |
--- |
--- |
--- |
--- |
|
重金屬ppm |
--- |
--- |
--- |
--- |
--- |
|
硫酸鹽≤% |
0.05 |
0.1 |
0.2 |
--- |
--- |
|
鹽酸不溶物≤% |
1.0 |
1.5 |
0.1 |
0.2 |
--- |
|
磷酸鹽≤% |
--- |
--- |
--- |
--- |
--- |
|
碘吸附值 |
--- |
--- |
--- |
--- |
--- |
|
篩余物≤% |
0.03 |
0.03 |
--- |
0.03 |
--- |
|
堆積密度≤% |
0.22 |
0.22 |
0.16 |
0.2 |
--- |
