Showing papers on "Boron oxide published in 1973"
TL;DR: In this article, the fundamental absorption edge of boron phosphide has been found to lie at around 5 eV and an activation energy of 49.27 kcal/mole has been obtained for the process.
21 citations
Patent•
09 Jul 1973TL;DR: A metal oxide resistor of the type consisting essentially of zinc oxide and containing significant amounts of the impurities bismuth trioxide, cobalt trioxide and manganese dioxide, antimony oxide, chromic oxide, and silicon dioxide was used in this paper.
Abstract: A metal oxide resistor of the type consisting essentially of zinc oxide and containing significant amounts of the impurities bismuth trioxide, cobalt trioxide, manganese dioxide, antimony oxide, chromic oxide, and silicon dioxide contains also significant amounts of the impurities barium oxide and boron oxide.
19 citations
TL;DR: In this article, the determination of boron in solutions to subp.p.b. concentrations by hollow-cathode emission was demonstrated, and the effects of cathode material, clean-up procedure, fill gas, and tube current were investigated to determine the conditions yielding optimal sensitivity.
17 citations
Patent•
20 Aug 1973
TL;DR: In this paper, a vessel suitable for the vacuum evaporation of metals, having improved temperature change stability and reduced electrical resistance decrease are obtained by hot pressing a mixture of an electrically conductive refractory material.
Abstract: Vessels suitable for the vacuum evaporation of metals, having improved temperature change stability and reduced electrical resistance decrease are obtained by hot pressing a mixture of an electrically conductive refractory material, such as titanium boride, aluminum nitride, boron nitride and boron oxide.
13 citations
Patent•
05 Feb 1973TL;DR: In this paper, a hermetic seal is formed between a metal article, containing a major portion of titanium, and glass by forming a boron-oxide coating on the article, heating the article to a temperature in excess of the melting point of Boron oxide, and then contacting the article and glass and firing the unit.
Abstract: A hermetic seal is formed between a metal article, containing a major portion of titanium, and glass by forming a boron-oxide coating on the article, heating the article to a temperature in excess of the melting point of boron oxide to form a boroncontaining film on the article and then contacting the article and glass and firing the unit.
13 citations
Patent•
27 Jun 1973
TL;DR: In this paper, refractory, corrosion-resistant materials suitable for the production of crucibles and the like, produced by compressing at elevated temperatures and pressures mixtures comprising 10-16 percent of aluminum nitride and 90-40 percent of boron nitride.
Abstract: The present invention relates to refractory, corrosion-resistant materials, suitable for the production of crucibles and the like, produced by compressing at elevated temperatures and pressures mixtures comprising 10-16 percent, by weight, of aluminum nitride and 90-40 percent, by weight, of boron nitride containing 5-25 percent, by weight, of boron oxide.
5 citations
01 Jan 1973
TL;DR: In this paper, the relationship between the composition, heterogeneous structure, and various physicochemical composition of glasses in one of the sections (A) in the system SiO2-B2O3-Al 2O3 -ZnO-Na2O, intersecting the two immiscibility regions found in it was investigated.
Abstract: Investigations have been carried out concerning the relationships between the composition, heterogeneous structure, and various physicochemical composition of glasses in one of the sections (A) in the system SiO2-B2O3-Al2O3-ZnO-Na2O, intersecting the two immiscibility regions found in it [1], Glasses in this section have the following chemical composition: (69-x)SiO2 22B2O3-xAl2O3·4ZnO·5Na2O (x = 0–8), and are close to a number of commercial and previously investigated sodium borosilicate glasses.
3 citations