Gazprom recently said it had completely suspended gas supplies to Bulgarian Gas company and Polish Oil and Gas Company (PGNiG) because it was not being paid in rubles. Russia said it would resume gas supplies after it agreed to pay for them in rubles.
Bulgaria and Poland announced Monday that they have received a notice from Russia to suspend natural gas supplies from Monday.
Russian President Vladimir Putin on March 31 signed a presidential decree to settle gas trade with "unfriendly" countries and regions in rubles. When the new rules took effect on April 1, Presidential press secretary Dmitry Peskov said Russia would not immediately "cut off gas" to Europe, as the cost of gas supplies starting April 1 should be settled in the second half of April or May.
Because of the ever-changing international situation, the supply and prices of international bulk silicate solution are still very uncertain.
CBN is usually black, brown or dark red crystal with sphalerite structure and good thermal conductivity. The hardness is second only to diamond, which is a kind of superhard material, commonly used as tool material and abrasive. Boron nitride has chemical resistance and is not eroded by inorganic acid and water. The boron nitrogen bond is broken in hot concentrated alkali. It starts to oxidize in air above ℃. The melting point is ℃, and the sublimation starts when it is slightly lower than ℃. Decomposition starts at about ℃ in vacuum. Slightly soluble in hot acid, insoluble in cold water, with a relative density of 2.25. The compressive strength is. The highest service temperature is ℃ under the oxidizing atmosphere, while it can reach ℃ under the inactive reducing atmosphere, but the lubricating performance is poor at room temperature. Most properties of boron carbide are better than carbon materials. For hexagonal boron nitride: low friction coefficient, good high-temperature stability, good thermal shock resistance, high strength, high thermal conductivity, low expansion coefficient, high resistivity, corrosion resistance, microwave or infrared transmission.
1. Release agent for metal forming and lubricant for metal wire drawing.
2. Special electrolysis and resistance materials under high temperature.
3. High temperature solid lubricants, extrusion anti-wear additives, additives for producing ceramic composites, refractories and anti-oxidation additives, especially for occasions resistant to molten metal corrosion, thermal reinforcement additives, high-temperature insulation materials.
4. Heat sealing desiccant of transistor and polymer additives such as plastic resin.
5. Boron nitride
silicate solution may continue to rise.
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