It’s always great to meet my HBN family in person 💯 Good morning 😃 #hbn #family #100K #bootcamp https://www.instagram.com/p/CqVPR-orjyg/?igshid=NGJjMDIxMWI=
may be remembering this wrong but that one scene post-five yrs when smj was worrying abt mr not being as considerate to him anymore.
bro u literally cut his heart open. he was probably worried abt the flower not working or smth like that and not like. mr not liking him anymore (didn’t he admit that he didn’t even like mr that much??) but bro. knife. heart. if he doesn’t pay attention to you anymore he has ever y right to do so sir
Hari Ballabh Narayan Singh Biography | Who is Hari Ballabh Narayan?
Hari Ballabh Narayan Singh was a renowned Indian Hindi writer, teacher, essayist and scholar, born on 1934 in a Rajput (Kshatriya) family in his native village in Muzaffarpur district of Bihar. He earned a Master of Arts (MA) degree in Hindi from a college in Muzaffarpur and started his career as a principal and teacher in the Government Upgraded Middle School located in Muzaffarpur. Hari Ballabh Narayan Singh was also the former secretary and president of Bihar Non-Gazetted Primary Teachers' Association, Patna. Singh is known for his extensive work and contribution in the field of education reform and literature, including notable literary works such as "Shiksha Vichar Manthan" (1984) and "Sugam Hindi Vyakaran Evam Rachna" (1989). He received the Best Hindi Writer Award in 1998. Singh passed away on October 30, 2023 at the age of 89 in Muzaffarpur, Bihar.
PM Anwar: Bill on Gig Workers Commission tabled in July
Prime Minister Datuk Seri Anwar Ibrahim announced that the government will table the Gig Workers Commission bill in Parliament this July after receiving a proposal from youth.
“Recently, there was a proposal by youth. They want the commission as tens of thousands, in fact exceeding 100,000 of the young people are working in the gig sector.
“The government has formulated and we have the…
Properties and synthesis of hexagonal boron nitride
Hexagonal boron nitride is a kind of synthetic inorganic material with many excellent properties, which is more and more widely used in a variety of new technologies and products, improving the technical level of modern industry and promoting the development of new material industry to deeper and wider fields.
Properties of hexagonal boron nitride
(1) High heat resistance. Hexagonal boron nitride (h-BN) in 0.1Mpa nitrogen heated to more than 3000 ℃ will sublimate, at 1800 ℃ when the strength of the room temperature for twice, so has excellent thermal shock resistance, in 1500 ℃ air-cooled to room temperature dozens of times will not rupture.
(2) High thermal conductivity. The thermal conductivity of hexagonal boron nitride products is about 34W/m-k, which is similar to that of stainless steel, and the thermal conductivity is larger.
(3) Low expansion coefficient. The expansion coefficient of hexagonal boron nitride is (2.0~6.5)*10-6/℃, second only to quartz glass, coupled with its high coefficient of thermal conductivity, so have excellent thermal shock resistance.
(4) Excellent electrical insulation. Hexagonal boron nitride has good high-temperature insulation, high purity hexagonal boron nitride maximum volume resistivity up to 1016 ~ 1018Ω-m, even at 1000 ℃ high temperature, there is still 104 ~ 106Ω-m.
(5) Good corrosion resistance. Hexagonal boron nitride has good chemical stability and is not wetted by most molten metals, glass, and salt, so it has strong resistance to acid, alkali, molten metal, and glass erosion, and good chemical inertia.
(6) Low coefficient of friction. Hexagonal boron nitride has excellent lubricating properties, the coefficient of friction is 0.16, which does not increase at high temperatures and is more resistant to high temperatures and oxidation than molybdenum disulfide and graphite.
(7) Machinability. Hexagonal boron nitride is very easy to use conventional metal cutting technology for product finishing, with a turning accuracy of up to 0.05mm, so the hexagonal boron nitride blanks can be processed to get the complex shape of the product.
Synthesis of hexagonal boron nitride
There are various methods to prepare hexagonal boron nitride, such as the elemental boron method, boric acid method, borate method, boron halide method, and so on. The basic principle is that boron compounds (such as boric acid, elemental boron, boron halide, and other borates) and nitrogen-containing compounds (such as ammonia, urea, ammonia chloride, melamine, etc.) together with the heating reaction can be obtained after chemical treatment of hexagonal boron nitride of different purities.
The global hexagonal boron nitride (HBN) market size reached US$ 801.8 Million in 2023. Looking forward, IMARC Group expects the market to reach US$ 1,115.2 Million by 2032, exhibiting a growth rate (CAGR) of 3.62% during 2024-2032.
Hexagonal Boron Nitride Powder- One of most reliable lubricant for high temperatures. Hexagonal Boron Nitride can provide lubricity at temperatures upto 1400 deg C. https://lowerfriction.com/dry-solid-lubricant-powders/hex-boron-nitride-hbn-powder/