Glass, barium aluminum borate

Crystallization of Barium Aluminum Borate Glasses— Rhodium as a Specific Catalyst... 

Experimental work is described on the nucleation and crystallization of various Ba0-B203-Al203 glasses both with and without metallic nucleating agents. Previous studies of the crystallization behavior of glasses are reviewed. Experiments are reported which indicate that small additions of metallic rhodium catalyzed internal crystallization in glasses of the barium aluminum borate system. Other noble metals were studied, but none was as effective as rhodium. 

Both hydrated and anhydrous metal borates have numerous industrial uses. Some of the major uses of hydrated metal borates are the manufacture of glasses, ceramics, and industrial fluids, and as micronutrient fertilizers, fire retardants, and biostats. Anhydrous borates find use as heterogeneous catalysts, scintillation hosts, and in the fabrication of optoelectronic devices. Anhydrous aluminum borates are used as additives in oxide ceramics to promote the formation of desirable phases. Also, aluminum borate whiskers are used as reinforcing additives in composite materials. Specific nses of sodium, calcium, zinc, and barium borates are discussed in sections below. 

Additives used in final products - Fillers aluminum borate whiskers, barium sulfate, glass fiber, montmorillonite, PTFE, zinc oxide, zirconium oxide ... 

Typical fillers carbon black, calcium carbonate, dolomite, clays, calcinated clays, talc, soapstone, zinc oxide, filmed silica, borates, iron oxide, zinc oxide, magnesium carbonate, pulverized polyurethane foam, barium and strontium ferrites, magnesium aluminum silicate, nylon fibers, quartz in EMI shielding field silver plated aluminum, silver plated nickel, silver coated glass spheres, silver plated copper, silver, nickel and carbon black... 

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