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(diǎn)2852℃,沸點(diǎn)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(jìn)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
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0.5
|
1.0
|
1.5
|
0.08
|
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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
|
---
|