Ai Sirong temperature and humidity test chamber operation precautions    First , to check whether the power is stable before turning on the power.    Second , in order to prevent electric shock or malfunction and failure, please do not turn on the power until the installation and wiring are completed.   Third , in order to avoid machine failure in the constant temperature and humidity test chamber, please provide power within the rated voltage range.    4. The constant temperature and humidity test chamber is non-explosive, so it cannot be used in a bad environment with flammable or explosive gas.    5. When the constant temperature and humidity test box is running, please try not to open the door. If it is opened at high temperature, it may cause scalding to the operator. Opening it at low temperature may cause frostbite to the staff, and may cause the evaporator to freeze and affect the cooling effect. If you must open, please do a good job of protection. The Seven Elements of Aster's Constant Temperature and Humidity Test Chamber A: The air vents of the airframe must be kept unobstructed to avoid malfunctions, abnormal movements, reduced life expectancy, and fire. If you find the machine is damaged or deformed when you open the box, do not use it. Second, when installing the equipment, be careful not to allow dust, thread, iron filings or other things to enter, otherwise it will malfunction or malfunction. Third, the wiring must be correct, must be grounded. Ungrounded may cause electric shock, malfunction, abnormal display, or measurement error. Fourth, check the terminal screws and holders regularly. Do not use them loosely. 5. During the operation of the instrument, the power input terminal cover must be installed on the terminal board to prevent electric shock. 6. Use a dry cloth to wipe the meter. Do not use alcohol, gasoline, or other organic solvents. Do not splash water on the meter. If the meter is immersed in water, stop using it immediately. Otherwise, there is a danger of electric leakage, electric shock, or fire. VII. Before the instrument is in operation, before modifying the settings, signal output, starting, stopping, etc., the safety shall be fully considered. The wrong operation will cause the working equipment to be damaged or malfunction.
Boron Nitride is a thermally and chemically resistant refractory Boron Product compound of boron and nitrogen with the chemical formula BN. Boron Nitride Ceramic exists in various crystalline forms that are isoelectronic to a similarly structured carbon lattice. The hexagonal form corresponding to graphite is the most stable and soft among Hexagonal Boron Nitride polymorphs, and is therefore used as a lubricant and an additive to cosmetic products. The cubic (zincblende aka sphalerite structure) variety analogous to diamond is called c-Boron Nitride Powder; it is softer than diamond, but its thermal Pvc Resin and chemical stability is superior. The rare wurtzite oron Nitride Coating modification is similar to lonsdaleite but slightly softer than Ethylene-Vinyl Acetate the cubic form.
Because of excellent thermal and chemical stability, boron nitride ceramics are used in high-temperature equipment. Boron nitride has potential use in nanotechnology.
Hexagonal Boron Nitride 50nm (along with Si3N4, NbN, and BNC) is reported to show weak fibrogenic activity, and to cause pneumoconiosis when inhaled in particulate form. The maximum concentration recommended for nitrides of nonmetals is 10 mg/m3 for BN and 4 for AlN or ZrN.
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