苍白
发表于 2025-3-26 22:41:58
http://reply.papertrans.cn/19/1899/189895/189895_31.png
meditation
发表于 2025-3-27 04:46:40
Contributions to Management Sciencest partially decomposed by heating to 300°C. Subsequently, heating to 600°C completely decomposed the boric acid to boron trioxide, which formed a liquid coating on the particles and after cooling strongly bonded the compact. One end of the compact was fitted into a graphite cup, which was used to h
思考而得
发表于 2025-3-27 06:55:44
Methodology and sample characteristics,mple rhombohedral boron has been crystallized from platinum melts. The necessary conditions are indicated. Some preliminary electrical and optical results for boron in the simple rhombohedral form are discussed and compared with results for boron that has been melted.
Hypomania
发表于 2025-3-27 11:53:28
Contributions to Management Scienceproximately 5 mm × 0.1 mm × 0.1 mm. Penetration twinning and growth steps at one end of a crystal were detected in some cases. These boron needles were characterized by smooth lateral faces of high reflectivity. Thin lathlike red crystals of AlB. were prepared from the elements at reduced pressure..
LEVER
发表于 2025-3-27 15:44:11
https://doi.org/10.1007/978-3-7908-1938-0modified floating-zone process. Silicon is the prevalent impurity in the end product, which was polycrystalline and had large crystallites. The resistivity of purest material was 4 · 10. ohm -cm at room temperature, and 5 · 10. ohm-cm at 1950°C; the intrinsic ionization energy was 1.5 ev. Doped mate
Detoxification
发表于 2025-3-27 20:22:53
Methodology and sample characteristics,that of Knoop-type micro-indentations. Data are presented for the (10.1) plane of boron, the (110), (101), and (221) planes of α-AlB., the (100–010),† (101–011),† and (201–021)† planes of β -AlB., the (100) plane of γ-AlB., the (010), (101), and (111) planes of A1B., the (00.1) plane of AlB., and al
vasculitis
发表于 2025-3-27 22:50:52
Preparation of Boron from Boron Carbide,ransfer. Boron of at least 99.8% purity can be made directly from technical-grade materials. Purity is a function of electrolysis voltages and boron carbide purity. Current efficiencies in excess of 95% are obtained and preferred electrolysis conditions are stated.
使害怕
发表于 2025-3-28 03:33:16
Various Preparations of Elemental Boron,rown on a tantalum wire at 1500°C. Boron diffusion into the wire at this temperature was serious. B.C crystals up to 1 mm in diameter were grown on a graphite disk heated to 2000°C. Infrared transmission, resistivity, and hardness tests were made on the samples.
动机
发表于 2025-3-28 08:57:32
http://reply.papertrans.cn/19/1899/189895/189895_39.png
表示问
发表于 2025-3-28 10:47:00
http://reply.papertrans.cn/19/1899/189895/189895_40.png