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Infrared optical lenses are specialized optical lenses designed specifically for receiving, focusing, and processing infrared wavelengths (typically referring to electromagnetic waves with wavelengths ranging from 0.76 1/m m to 1000 m). They differ fundamentally from the visible light lenses we are familiar with (such as camera and mobile phone lenses) in terms of design, materials, and working principles. Their core task is to efficiently transmit infrared radiation and form high-quality images.
In simple terms, it is an "eye" that enables "infrared cameras" to discern the temperature and outline of objects.

Place of Origin:
China

Brand Name:
OEM

Model Number:
STD2

Material:
Glass

Usage:
Slit lamp

Structure:
Plano-convex

Shape:
Aspheric

Specifications:
20D 78D 90D

Agricultural urea N46 46%


Properties of urea
Urea, also known as carbamide, carbamide and urea. Pure urea is white, tasteless, odorless, needle shaped or prismatic crystal, with a melting point of 132.7 under normal pressure. It is hygroscopic, deliquescent, hydrolyzable, and weakly alkaline. It is made into compound fertilizer with acid fertilizer. Urea is an organic compound composed of carbon, nitrogen, oxygen and hydrogen. It is a white crystal. Urea is one of the simplest organic compounds. The most important use of urea is as fertilizer. Its nitrogen content is more than 46%. After being converted into ammonium carbonate in soil, urea is hydrolyzed and absorbed by plants. It is the nitrogen fertilizer with the highest nitrogen content at present.
Molecular formula of urea: CO (NH2) 2, molecular weight 60.06, density 1.335g/cm The melting point is 132.7. Soluble in water and alcohol, insoluble in ether and chloroform. It is slightly alkaline. It can react with acid to form salt. It has hydrolysis. Condensation reaction can be carried out at high temperature to produce biuret, triuret and cyanuric acid. Heat to 160 and decompose to generate ammonia gas and turn into cyanic acid at the same time. Urea can be hydrolyzed into ammonia and carbon dioxide under the action of acid, alkali and enzyme (acid and alkali need to be heated). Unstable to heat, heat to 150 160 to deamination to biuret. Urea is easily soluble in water, 105g can be dissolved in 100ml water at 20 , and the aqueous solution shows neutral reaction. There are two kinds of urea products: crystalline urea is white acicular or prismatic crystal with strong hygroscopicity; Granular urea is a translucent particle with a particle size of 1~2mm, which has a smooth appearance and improved moisture absorption.
Urea is a physiologically neutral fertilizer, which does not leave any harmful substances in the soil and has no adverse effects after long-term application. However, a small amount of biuret, also known as biuret, will be produced when the temperature is too high during granulation, which has an inhibitory effect on crops. Urea is molecular before conversion and cannot be adsorbed by soil, so it should be prevented from being lost with water; The ammonia formed after conversion is also volatile, so urea should also be deeply covered with soil. Urea is the first synthetic organic substance and widely exists in nature, such as 0.4% urea in fresh human feces.

The new version of national standard GB/T2440-2017 for urea has been officially implemented since July 1, 2018. Compared with the replaced 2001 standard, certain adjustments have been made.
New standard GB/T2440-2017

White crystalline powder, high-purity stabilizer for propellants and explosives.

Effectively absorbs nitrogen oxides, inhibits thermal decomposition of nitrate esters, and extends storage life.

Features good compatibility, high thermal stability and low sensitivity. Widely used in double-base propellants, nitroglycerin explosives and pyrotechnics.

The chemical symbol of sulfur is S, with an atomic number of 16 and an atomic weight of 32.06. It is located in Group VIA of the third period in the periodic table. Sulfur has many allotropes, and the important ones include orthorhombic sulfur, monoclinic sulfur, and elastic sulfur.

At normal temperature and pressure, sulfur is a pale yellow crystal.

Custom Liquid filled Solar Inverter Step up Oil-Immersed Transformer for photovoltaic power plants includes hermetically sealed, amorphous alloy, conservator type and on-load tap changer type, which is usually pole mounted or installed in distribution station for daily lighting and factory power whose LV output up to 0.4kV. Our distribution transformer rating is up to 2500kVA, and primary voltage up to 35kV. The corrugated tanks as thermal expansion and contraction component enable the transformer oil completely isolated with the atmosphere. Oil distribution transformer with primary voltage range of 6,10,10.5,11,20,22,24,33, 35,38.5kV can be manufactured according to customer requirements.

Aviation turbine engine base lubricating oil (synthetic oil) is a high-performance lubrication base component specially designed for turbine engines (turbojet, turbofan, turboprop, turboshaft). It must pass rigorous certifications such as MIL-PRF-23699 (US military standard), MH/T 6084 (civilian standard), and GJB 135A (national military standard). Its core function is to lubricate bearings/gears, dissipate heat, prevent coking and corrosion, and ensure the stable operation of the engine under extreme conditions ranging from -60to 246.

Definition:
5N polycrystalline Germanium Ingot refers to a high-purity polycrystalline germanium material with a purity of 99.999% (five nines), which is often refined through the Zone Refining method. It is used in the manufacturing of infrared optical components, semiconductor materials, optoelectronic devices and other high-end fields, and is the basic raw material for manufacturing high-quality optoelectronic products.
Production process:
The 5N Zone melting germanium ingot is a high-purity germanium metal material obtained through the Zone Refining method, with a purity of over 99.999% (5N), and some products can even reach 6N-8N (99.9999%-99.999999%). The zone melting method utilizes local heating to make germanium material solidify directionally in the molten zone. Through multiple purifications, impurities are concentrated at the end of the ingot and removed, ultimately obtaining high-purity polycrystalline germanium ingots.
The production process adopts segmented variable-speed zone melting technology, combined with the switching between high-purity nitrogen and nitrogen mixed gas, to achieve deep purification. Meanwhile, through graphite boat coating treatment and specific equipment design, the silicon content is controlled below 1ppb (parts per billion) to ensure the surface quality of the material.

Product name Tetramethylurea CAS NO.: 632-22-4 MF: C5H12N2O Structural type: Properties: Colorless transparent liquid. Slightly pleasant smell. It can be miscible with water, petroleum ether and most commonly used organic solvents.
Product specification:ï¼?Q/CFH 14-2019ï¼? Items Specification Appearance Colorless Transparent Liquid Mass fraction of tetramethylurea, % â?¥ 99.5 water content,% â?¤ 0.5
Use: It is mainly used as an intermediate of insecticide; Advanced solvent, used in dye and other industries; As an intermediate of surfactant.
Packaging, storage and transportation: Galvanized iron drum packaging, 180kg / barrel.

Grade C NitrocelluloseCellulose nitrate CAS 9004700

Nitrocellulose is a white odorless and odorless solid Celluloid plastic is a thermoplastic material containing 20 camphor plasticizer It softens significantly at 80 can be molded and processed at 110125 and can self ignite above 165 Transparent soft with high mechanical strength and low water absorption No deformation and no white spots in boiling water for 2 minutes Stable to water and general dilute acid solutions can be corroded by dilute alkaline solution partially soluble in benzene and dichloroethylene and soluble in solvents such as ethanol and ethyl acetate

Nitrocellulose is mainly used in the plastic industry to manufacture stationery and educational items such as table tennis balls triangular plates pen holders eyeglass frames toys and umbrella handles and tool handles in daily necessities Nitrocellulose can also be used as a fiber adhesive coating and substrate material

This product is nontoxic This product belongs to Class A flammable dangerous goods Packaged in wooden boxes with plastic bags lined inside Each box should not exceed 160kg or packaged according to user requirements There should be a flammable mark on the outside of the box Storage should be placed in a dry ventilated and clean warehouse away from heat sources and direct sunlight It should not be stored together with acidic self igniting and explosive materials It is strictly prohibited to approach open flames Transportation should be protected from sunlight and rain and should be carried out in accordance with the transportation regulations of the transportation department for dangerous goods

CN is fully kneaded with plasticizers such as camphor solvents alcohol dyes or pigments in a kneading machine at 36 and then filtered in a pressure filter at 60 The filtered material is rolled on a two roller rolling machine and the resulting thin sheet is crushed dried flattened or polished to obtain sheetlike CN plastic The rolled thin sheet can also be placed into an extrusion machine to form a tubular object

Nitrocellulose is a white, odorless, and odorless solid. Celluloid plastic is a thermoplastic material containing 20% camphor plasticizer. It softens significantly at 80 , can be molded and processed at 110-125, and can self ignite above 165 . Transparent, soft, with high mechanical strength and low water absorption. No deformation and no white spots in boiling water for 2 minutes. Stable to water and general dilute acid solutions, can be corroded by dilute alkaline solution, partially soluble in benzene and dichloroethylene, and soluble in solvents such as ethanol and ethyl acetate.

Method of production

Nitrocellulose is a mixture of acid that nitrates cellulose, undergoes acid removal, pre washing, boiling, washing, dehydration, and then uses alcohol to remove water, resulting in nitrocellulose containing alcohol.

purpose

Nitrocellulose is mainly used in the plastic industry to manufacture stationery and educational items such as table tennis balls, triangular plates, pen holders, eyeglass frames, toys, and umbrella handles and tool handles in daily necessities. Nitrocellulose can also be used as a fiber, adhesive, coating, and substrate material.

Security

This product is non-toxic. This product belongs to Class A flammable dangerous goods. Packaged in wooden boxes with plastic bags lined inside. Each box should not exceed 160kg, or packaged according to user requirements. There should be a "flammable" mark on the outside of the box. Storage should be placed in a dry, ventilated, and clean warehouse, away from heat sources and direct sunlight. It should not be stored together with acidic, self igniting, and explosive materials. It is strictly prohibited to approach open flames. Transportation should be protected from sunlight and rain, and should be carried out in accordance with the transportation regulations of the transportation department for dangerous goods.

Forming processing

CN is fully kneaded with plasticizers (such as camphor), solvents (alcohol), dyes (or pigments) in a kneading machine at 36, and then filtered in a pressure filter at 60 . The filtered material is rolled on a two roller rolling machine, and the resulting thin sheet is crushed, dried, flattened, or polished to obtain sheet-like CN plastic. The rolled thin sheet can also be placed into an extrusion machine to form a tubular object.

1. Chopped basalt fiber
Basalt fiber is a kind of inorganic fiber material. Chopped basalt fiber is an inorganic mineral fiber with a length of less than 50mm and can be evenly dispersed in cement concrete.
2. Characteristics of chopped basalt fibers
(1) The naturalness of raw materials. Because the raw material for producing continuous basalt fiber depends on the natural volcanic extrusive rock, there are no ingredients harmful to human health except that it is inherently high in chemical stability and thermal stability.
(2) Comprehensive performance. Basalt fiber is acid resistant and alkali resistant. It is both low temperature and high temperature resistant. It is insulated and insulated by heat and electricity. Its tensile strength is higher than that of large tow carbon fiber. Its elongation at break is even better than that of small tow carbon fibers. It has high compressive strength, shear strength and adaptability to aging, and has good comprehensive properties in harsh environment.
(3) Low cost. The price of basalt fiber used in cement concrete is significantly lower than that of steel fiber and polyester fiber.
(4) Natural compatibility. Basalt fiber is a typical silicate fiber, which is easy to disperse when mixed with asphalt concrete, cement concrete and mortar. The newly mixed basalt fiber concrete has stable volume, good workability and durability, and has superior high temperature resistance, anti-seepage, crack resistance and impact resistance.

For pharmaceutical intermediates
2-Cyanophenol
Product name 2-Cyanophenol CAS NO.: 611-20-1
MF: C7H5NO
Structural type:
Properties: Grayish white to light brown powder.Items Specification
Appearance White or off white powder
Salicylnitrile content, % 98.0
Salicylamide content,% 0.5
water content,% 0.5

1. Chopped basalt fiber
Basalt fiber is a kind of inorganic fiber material. Chopped basalt fiber is an inorganic mineral fiber with a length of less than 50mm and can be evenly dispersed in cement concrete.
2. Characteristics of chopped basalt fibers
(1) The naturalness of raw materials. Because the raw material for producing continuous basalt fiber depends on the natural volcanic extrusive rock, there are no ingredients harmful to human health except that it is inherently high in chemical stability and thermal stability.
(2) Comprehensive performance. Basalt fiber is acid resistant and alkali resistant. It is both low temperature and high temperature resistant. It is insulated and insulated by heat and electricity. Its tensile strength is higher than that of large tow carbon fiber. Its elongation at break is even better than that of small tow carbon fibers. It has high compressive strength, shear strength and adaptability to aging, and has good comprehensive properties in harsh environment.
(3) Low cost. The price of basalt fiber used in cement concrete is significantly lower than that of steel fiber and polyester fiber.
(4) Natural compatibility. Basalt fiber is a typical silicate fiber, which is easy to disperse when mixed with asphalt concrete, cement concrete and mortar. The newly mixed basalt fiber concrete has stable volume, good workability and durability, and has superior high temperature resistance, anti-seepage, crack resistance and impact resistance.

Produced by Chongqing Hesheng Longgang Technology Co., Ltd. (manufacturer)
Basalt fiber reinforcement (new material to replace reinforcement)

Product Description: basalt fiber reinforced bar (BFRP) is a new composite material formed by pultrusion process. It is made of basalt fiber as reinforcement, resin, filler and curing agent. Now it has been widely used in construction, highway and bridge constructionã??
Basalt fiber reinforcement can completely replace ordinary steel reinforcement and deformed steel; Compared with ordinary reinforcement, it has strong advantages: (see Annex for technical parameters)
1. The cost is the same as that of ordinary reinforcement;
2. The strength is 200% of the ordinary reinforcement with the same specification and diameter; The tensile strength reaches 1100mpap; The reinforcement is only 450MPa,
3. Basalt fiber reinforcement, especially with high acid, alkali and corrosion resistance, is a kind of electrical insulator that will never rust.
4. Basalt fiber reinforced bar, which is non-magnetic. It has high tolerance to the moisture concentration in cement mortar and the penetration and diffusion of carbon dioxide, and can prevent the corrosion of concrete structure in harsh environment, so as to improve the durability of buildings and bridges.
5. The specific gravity of basalt fiber reinforcement is 2.1g/cm3; The specific gravity of steel and reinforcement is 7.85/cm3; The diameter weight of the same specification is 370% lighter than that of steel reinforcement, and the strength is 200% of that of steel reinforcement.
6. The physical properties of basalt fiber reinforcement are higher than that of steel reinforcement, and the cost is the same as that of steel reinforcement, which is of epoch-making significance to replace steel reinforcementã??

Application of nitrocellulose
Nitrocellulose, also known as cellulose nitrate or nitrocellulose, is an organic polymer compound with the chemical formula (C6H7N3O11) n. It is the product of the esterification reaction between cellulose and nitrate, usually in the form of white or slightly yellow cotton fluff, insoluble in water, but soluble in organic solvents such as esters and acetone
Nitrocellulose, also known as cellulose nitrate ester, abbreviated as NC, commonly known as nitrocellulose, is the product of the reaction between cellulose and nitrate. Nitrocellulose made from cotton fibers is called nitrocellulose. Nitrocellulose is a white fibrous polymer that is resistant to water, dilute acids, weak alkalis, and various oils. Different degrees of polymerization result in different strengths, but they are all thermoplastic substances. Easy to change color under sunlight and highly flammable. Attention should be paid to safety in production, processing, packaging, storage, transportation, sales, and use.

The basalt fiber roving of our company adopts the new tank kiln method and 2400 hole large leakage plate to form basalt roving products With a series of advantages such as high strength, large modulus, good temperature resistance, good chemical corrosion resistance and good electrical insulation, basalt is produced with homogenized basalt raw materials, with excellent performance, stable quality and small dispersion coefficient.
Basalt fiber roving is a new material to replace glass fiber and carbon fiber

The gearbox of a wind turbine is one of the key components in wind power generation equipment, used to transfer the kinetic energy of the rotating wind turbine to the generator, thereby generating electrical energy. It is usually composed of multiple gears, which increase the speed of the wind turbine through precise transmission ratios and convert it into a speed suitable for the operation of the generator. Usually, the speed of the wind turbine is very low and far from the required speed for the generator to generate electricity. It must be achieved through the speed increasing effect of the gearbox gear pair, so the gearbox is also called a speed increasing gearbox.
Our company supplies spare parts for wind turbine gearboxes: gears, etc.

Gallium metal with a content of 99.99% (also known as Ga-4N) is a common high-purity specification, widely used in fields such as electronics, semiconductors, LEDs, solar cells, and optical materials. It is prepared through purification processes such as acid washing, alkaline electrolysis, or zone melting, and serves as an intermediate product for the preparation of ultra-pure gallium (such as over 99.9999%). Its core characteristics are its low melting point (<30) and excellent thermal and electrical conductivity.