Wetting and the contact reaction in the LaB6-(Cu-Ni) system

Conclusions The wetting of lanthanum hexaboride by copper is accompanied by the establishment of a bond between them which has a chemical character. Raising the temperature markedly improves wetting, full wetting being attained at a temperature of 1770°K. Nickel in the LaB₆-(Cu-Ni) system constitutes a weak interface-active addition. The chemical reaction of Cu+5% Ni, Cu+10% Ni, and Cu+15% Ni alloys with lanthanum hexaboride takes place with the formation of a new phase enriched in nickel.Translated from Poroshkovaya Metallurgiya, No. 7(223), pp. 68–72, July, 1981.     

Characteristics and Controlling of LaB_6-ZrB_2 Eutectic Microstructure

ＣｈａｒａｃｔｅｒｉｓｔｉｃｓａｎｄＣｏｎｔｒｏｌｉｎｇｏｆＬａＢ６ＺｒＢ２ＥｕｔｅｃｔｉｃＭｉｃｒｏｓｔｒｕｃｔｕｒｅＣｈｅｎＣｈａｎｇｍｉｎｇ（陈昌明），ＺｈｏｕＷａｎｃｈｅｎｇ（周万城），ＺｈａｎｇＬｉｔｏｎｇ（张立同）（ＮａｔｉｏｎａｌＫｅ...     

Optical constants of LaB6 AND Ce B6

Summary The optical properties of the hexaborides of lanthanum and cerium were investigated in the infrared region of the spectrum. It is shown that lanthanum hexaboride possesses marked semiconductor properties with a width of the prohibited zone of 0.08 eV. Cerium hexaboride is of a metallic nature.     

Thermodynamic modeling of parameters for quasibinary eutectic LaB6−ZrB2

A consistent system is contructed for models of phase equilibria in the binary systems La−B, Zr−B, and La−Zr and the ternary system La−Zr−B. The models are used to calculate the liquidus curve for the quasibinary section of LaB₆−ZrB₆. Calculations are in good agreement with experimental data. The system of models developed makes it possible to predict the effect of alloying elements on the shape of the liquidus surface. Institute for Problems of Materials Science, Ukraine National Academy of Sciences, Kiev. Translated from Poroshkovaya Metallurgiya, Nos. 1–2(405), pp. 31–36, January–February, 1999.     

高频红外吸收法测定六硼化镧中碳含量

试样于高频感应炉的氧气流中加热燃烧。使样品中的碳全部转化为二氧化碳,红外检测。     

Laser processing of LaB6-based thick film resistors

The paper studies the effect of laser processing on the structure and electrophysical properties of LaB₆-based thick film resistors (TFR). The phases and structure of the composition are investigated. The exposure to micro-and nanosecond pulses, unlike millisecond ones, is shown to insignificantly increase the electrical resistance of the film and to aid in forming more uniform and fine TFR structure. LaB₆-based TFRs are more resistant to long-term exposure to nanosecond laser radiation than BaB₆-and (BaB₆-LaB₆)-based ones.     

碳化硼还原法制备LaB6的提纯

采用碳化硼还原法制备LaB6.为了提高LaB6的纯度,先将原料碳化硼进行化学处理,再用其还原氧化镧,并经酸洗、蒸馏水洗等步骤制备出Fe含量低于0.01％、C含量低于0.02％的LaB6粉末.整个工艺过程LaB6的收率为79.5％.