The sound insulation of wooden doors is generally good. In home decoration, most people want to live with the elderly, children or babysitters, plus the size of the house is not too big, the sound insulation effect of the wooden door is particularly critical. However, the sound insulation index is a very professional number. It is not too big for the merchants to say, so it is very practical to learn a way to check the sound insulation of the wooden door.
Sleep is an active process of the human body that restores spirit and relieves fatigue. Healthy sleep, a balanced diet and proper exercise are three recognized health standards in the international community. However, the “uneasy sleep†of many family members is caused by the passive victimization of others including snoring and differences in living habits of intergenerational people. There are data indicating that more than 15 decibels of noise will affect the sleep of others after they fall asleep.
A “snoring survey†shows that snoring is the killer of healthy living, and 25% of couples sleep because of snoring. The sound insulation effect of the bedroom wooden door is extremely important. The “Functional†research team of Baidemumen has long been devoted to the research on the sound insulation effect of wooden doors. Last year, they launched functional wooden doors such as “sound insulationâ€. Founder Ma Hongwei said that 70% of people will be awakened when noise such as snoring exceeds 60 decibels. The sound insulation of the living room door has always been the goal of the production and technical personnel of the wooden door enterprise. However, due to the structure, materials, processing and other aspects of the wooden door system, the soundproofing research and development of the wooden door is not smooth.
Baide lasted for 3 years and finally solved this big problem first in the wooden door industry. The sound insulation of the authoritative department is more than 28 decibels. The mute feature has become the "feature" of the wood door industry. Insiders said that Paterson pioneered the development of sound-proof functional wooden doors (moisture-proof function), breaking through the mindset of the previous wooden door enterprises, creatively developing products from the humanistic point of view, solving this problem that plagued the industry, leading the wood door industry today. The functional style.
Ammonium Phosphate, also known as triammonium Phosphate, inorganic compound, molecular formula (NH4) 3PO4, is an ammonium salt of phosphoric acid, containing anhydrous substances and hydrates. Ammonium phosphate is a colorless crystal or gray white powder, sometimes particles, soluble in water. Ammonium phosphate contains nitrogen and phosphorus. It is a compound fertilizer.
When ammonium phosphate is used as fertilizer in agriculture, special attention should be paid to its thermal decomposition and alkali decomposition. In calcareous soils with pH greater than 7.5, decomposition and volatilization of ammonia are easy to occur, and water-soluble phosphorus is transformed into citric acid-soluble phosphorus. The main chemical reactions were:
CaCO3+ (NH4) 2HPO4 - 2NH3+CaHPO4+CO2+H2O
Ammonium phosphate is a kind of high concentration and quick-acting compound fertilizer. Its content of N+P2O5 is about 64%, which is soluble in water and has a high salt index. The salt indices of monoammonium phosphate and diammonium phosphate are 30 and 34, respectively. Therefore, special attention should be paid to not contacting seeds directly when planting fertilizer, and the fertilization point should not be too close to the young roots and buds when making base fertilizer, so as to avoid the burning of ammonia released from the molecule. Ammonium phosphate can be used as base fertilizer and topdressing fertilizer, but because its molecule contains more phosphorus nutrients than nitrogen, its N:P2O5 ratio of monoammonium phosphate is about 1:5 and diammonium phosphate is about 1:2.5. In order to make the phosphorus contained in it play a full role in the early stage of crop growth, it is generally suitable to be used as base fertilizer, for those soils with higher available phosphorus or for rice. For crops with relatively less phosphorus, even as base fertilizer, a certain amount of nitrogen fertilizer should be applied to adjust the proportion of N:P2O5 to an appropriate level. Ammonium phosphate can be mixed with most fertilizers, but it should be avoided to mix with alkaline fertilizers, because it can promote the decomposition of ammonium phosphate and release ammonia.
In addition, using ammonium phosphate as raw material, a variety of compound fertilizers can also be prepared. The main varieties are: (1) ammonium thiophosphate. If the grade of ammonium thiophosphate produced by 32% monoammonium phosphate and 59% Ammonium Sulfate is 16-20-0, the product has good physical properties, the critical moisture absorption point is 75.8%, higher than that of monoammonium phosphate; 2. ammonium nitrate. The grade of representative varieties is 25-25-0, 28-14-0 and so on, which are products neutralized by mixed acid of phosphoric acid and nitric acid and ammonia; and (3) ammonium uric phosphate. This is a kind of high concentration solid compound fertilizer, which has N-P and N-P-K types, such as 28-28-0 and 22-22-11 varieties. It is generally made of ammonium phosphate slurry or granulated powder products and spraying granulated urea. The product has good physical properties and is suitable for a variety of soils and crops.
Ammonium Phosphate
Ammonium Hydrogen Phosphate,Ammonium Phosphate Dibasic,Ammonium Phosphate,Ammonium Hydrogen Phosphate Dibasic
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