Dɛn nti na MgO su ho hia kɛse wɔ ɔhyew afiri a wɔyɛ mu?
Wɔ wɔn a wɔyɛ anyinam ahoɔden afiri a wɔde yɛ ɔhyew no fam no, magnesium powder (magnesium oxide powder, MgO) ne anyinam ahoɔden afiri a wɔde yɛ ɔhyew no "koma". Ne su na ɛkyerɛ ahobammɔ, adwumayɛ, ne nkwa nna a ɛwɔ ɔhyew afiri no mu tẽẽ.
Dɛn ne Magnesium powder?
Edin a ɛteɛ a wɔde frɛ "magnesium oxide powder" ne MgO, ionic aduru a magnesium ne oxygen na ɛyɛ. Ɛyɛ powder a ɛyɛ fitaa a ɛnyɛ huam, na ɛnyɛ dɛ.
Wɔ mfiridwuma mu nneɛma dodow no ara mu, te sɛ anyinam ahoɔden nneɛma a ɛma ɔhyew no, nea yɛfrɛ no "magnesium powder" no yɛ nokwarem no "magnesium oxide powder" (MgO), ade a ɛyɛ den, a ɛnyɛ-ntumi nhyew, a ɛsono no titiriw wɔ dade magnesium powder a ɛyɛ hyew ho.
Dɛn nti na ɛho hia sɛ wɔde magnesium oxide powder a ɛyɛ papa{0}}di dwuma wɔ nneɛma a ɛma ɔhyew mu?
Eyi fi ne nneɛma atitiriw anan a ɛkyerɛ sɛnea nneɛma a ɛma ɔhyew no yɛ adwuma, ahobammɔ, ne nkwa nna tẽẽ no mu:
1. Insulation a eye kyɛn so
Magnesium oxide is an excellent insulator with an extremely high resistivity (>1013 Ω·cm wɔ dan mu hyew mu). Ɛde ahotoso tew ɔhyew waya a ahoɔden wom (resistance wire) no fi dade a atwa ho ahyia no ho, na esiw nsu a ɛtwetwe anaasɛ ɛyɛ tiaa ano na ɛma nea ɔde di dwuma no nya ahobammɔ. Eyi ne n’adwuma titiriw sen biara.
2. Ɔhyew Conductivity a eye kyɛn so
Magnesium oxide ahoɔden a ɛma ɛyɛ hyew (bɛyɛ 30-40 W/(m·K)) korɔn koraa sen mframa de. Ɛde ɔhyew a ɛkorɔn-ɔhyew a ɔhyew waya no de ba no kɔ dade a wɔde ahyɛ mu no mu yiye na ɛyɛ pɛpɛɛpɛ, na afei ɛkɔ ade a ɛyɛ hyew no mu. Ɛnyɛ sɛ eyi ma ɔhyew a ɛyɛ adwuma yiye nko na mmom esiw ɔhyew a ɛboaboa ano wɔ ɔhyew waya no mu nso ano, a ebetumi ama ɔhyew a ɛboro so wɔ mpɔtam hɔ na ahyew, na ɛnam so ama ne nkwa nna akyɛ. 3. High Chemical Stability and High-Temperature Resistance
3.Sintered magnesium oxide wɔ nwene a ɛkɔ soro kodu digrii 2800 .
Ɛyɛ nea ɛyɛ den yiye wɔ ɔhyew a wɔtaa de yɛ adwuma wɔ nneɛma a ɛma ɔhyew (digrii Celsius ɔhaha pii kosi mpempem pii) mu. Ɛnporɔw, ɛnsɛe, anaasɛ ɛnne nnuru a wɔde yɛ ɔhyew waya anaa dade tube shell a wɔde ahyɛ mu no nyɛ adwuma, na ɛma wotumi de ho to so bere tenten-.
4. Mfiri Ahoɔden a Ɛkorɔn ne Packing Density
Wɔ bere a wɔreyɛ nneɛma a ɛma ɔhyew no, "tube shrinking" adeyɛ bi ba, baabi a wɔde dade tube no mia wɔ nhyɛso kɛse ase ma ɛyɛ magnesium oxide powder a ɛwɔ mu no mu den. Magnesium oxide powder a ɛyɛ papa-a ne kɛse yɛ pɛpɛɛpɛ no betumi agyina saa nhyɛso yi ano a ɛnsɛe. Afei compaction, enya packing density a ɛkorɔn yiye, yi emu voids fi hɔ, hwɛ hu sɛ maximum insulation ne thermal conductivity, na esiw adwumayɛ sɛe esiane vibration.
Wogyina saa nneɛma yi so de magnesium oxide powder di dwuma titiriw wɔ:
Nneɛma a ɛma ɔhyew: Eyi ne beae a wɔde di dwuma kɛse sen biara. Wɔde di dwuma wɔ tubular heating elements (ɔhyew tubes), strip heaters, plate heaters, ne nneɛma afoforo mu. Wɔtaa hu wɔ anyinam ahoɔden nkuku, fononoo, ahunmu ɔhyew afiri, mfiridwuma mu nsu a wɔde yɛ nsu, ne nea ɛkeka ho mu.
In the market, the standard/mid-range grade magnesium powder contains approximately 98% to 99.3% MgO purity, boasting excellent insulation and thermal conductivity, and well-controlled moisture absorption. It meets the requirements of most general-purpose electric heating elements, making it a popular choice for mainstream household appliances such as electric kettles, ovens, microwave ovens, rice cookers, and water heaters.
Common Mesh ne Micrometer (μm) Nsakraeɛ Table:
|
Mesh a wɔde yɛ nneɛma |
Aperture (μm) a ɛwɔ afiri mu . |
Nkyerɛkyerɛmu a ɛfa sɛnea wɔde di dwuma wɔ Magnesium Oxide Powder mu |
|
20 - 40 mesh |
850 - 425 μm |
Wɔde nneɛma nketenkete a ɛyɛ mmerɛw na ɛyɛ nhyehyɛe titiriw no na ɛma mmoa. |
|
40 - 100 mesh |
425 - 150 μm |
Nneɛma nketenkete a ɛwɔ mfinimfini ne ade titiriw a ɛwɔ powder nipadua no mu. |
|
100 - 325 mesh |
150 - 45 μm |
Wɔde nneɛma nketenkete di dwuma de hyɛ nsonsonoe a ɛda nneɛma nketenkete a ɛwɔ ntam no mu ma. |
|
-325 a ɛyɛ ahama |
< 45 μm |
Ultra-fine powder, a wɔde hyɛ nsonsonoe nketenkete mu yiye koraa, nanso dodow betumi aka sɛnea ɛsen. |
Ɔkwan bɛn so na ɛsɛ sɛMgOwɔbɛpaw no gyina ɔhyew tube diameter ne ɔhyew waya so?
Sɛ worepaw magnesium powder a, yɛsrɛ sɛ kyerɛ ade a wɔde yɛ ɔhyew, sɛnea wɔde bɛyɛ, ne kɛse, ne ne tenten.
A.Sɛ wopɛ sɛ wohyew tubular a ne kɛse yɛ 8mm anaa nea ɛboro saa a, fa 40-325 mesh magnesium powder di dwuma ma medium- ne low-temperature applications, te sɛ nea ɛwɔ aburow cooker heating elements mu.
Sɛ wopɛ sɛ wohyew tubular a ne kɛse yɛ 7-8mm a, fa 50-325 mesh magnesium powder di dwuma ma ɔhyew a ɛwɔ mfinimfini ne nea ɛkɔ soro, te sɛ dade ne kettle mu.
Sɛ wopɛ sɛ wo hyew tubular a ne kɛse yɛ 6.5mm anaa nea ennu saa a, fa 60-325 mesh magnesium powder di dwuma ma ɔhyew a ɛkorɔn, te sɛ fononoo ne mframa fryers.
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