摘要:
Porous, silica-rich shapes have improved strength and abrasion resistance by leaching the precursor glass shape in preconditioned acid having silica ion and at least one common ion that is also present in the precursor glass shape. The precursor glass shapes have shapes such as fibers, hollow fibers, tubes, rods, beads, hollow spheres and plates and compositions having 30-75 volume percent silica and at least 10-65 volume percent nonsiliceous acid extractable components. Preconditioning of the acid solution results from a pretreatment of the acid with compounds that dissociate into the ions when added to the acid solution or with shapes, particles or fragments of glass compositions different from or similar to the glass shape to be leached so long as the glass composition has extractable material to provide the silica ion and at least one common ion.
摘要:
A composite fused quartz material is disclosed for processing semiconductor grade silicon material in an improved manner. The modified vitreous material includes a disperse phase of fine size silicon metal particles which are distributed in preselected regions of the fused quartz matrix as a means of exercising temperature control in the various semiconductor processing operations using these fused quartz parts. Such utilization of the modified vitreous material in single crystal silicon rod growth and production of semiconductor grade silicon by diffusion doping is described. A method to produce the modified vitreous material is also disclosed.
摘要:
The invention relates to a photosensitive and heat-sensitive glass which is composed of 25-70 mol % of Al.sub.2 O.sub.3 and/or Ga.sub.2 O.sub.3, 30-75 mol % of at least one of CaO, BaO, SrO and MgO and 0-40 mol % of an auxiliary component which is at least one of SiO.sub.2, GeO.sub.2, B.sub.2 O.sub.3 and P.sub.2 O.sub.5. The glass is produced by melting a batch mixture of powdery raw materials. By exposure to UV rays the glass colors in yellowish brown, and the color does not fade by termination of the exposure. Bleaching of the colored glass is accomplished by heating for a short time at about 150.degree.-300.degree. C. Coloration and bleaching can be repeated without deterioration. The same glass turns into an opaline foam glass, which presents a very attractive appearance, by heat treatment at a temperature above the softening temperature. This change is irreversible. The foams created in the glass matrix are usually tens of microns in diameter.
摘要翻译:本发明涉及一种感光和热敏玻璃,其由25-70mol%的Al2O3和/或Ga2O3,30-75mol%的CaO,BaO,SrO和MgO中的至少一种和0-40mol% 的SiO 2,GeO 2,B 2 O 3和P 2 O 5中的至少一种的辅助成分。 玻璃是通过熔化粉末状原料的批料混合而制成的。 通过暴露于紫外线,玻璃颜色呈黄棕色,并且颜色不会通过曝光终止而褪色。 有色玻璃的漂白通过在约150-300℃下加热短时间来实现。可以重复着色和漂白而不变质。 相同的玻璃变成蛋白质泡沫玻璃,通过在高于软化温度的温度下进行热处理,呈现出非常有吸引力的外观。 这种变化是不可逆转的。 在玻璃基质中产生的泡沫通常直径为几十微米。
摘要:
An improved clot activator system for reducing the clotting time for blood samples in serum separation tubes, and the like, as well as increasing the degree of clotting, while at the same time, reducing the cost of production. This is achieved by the addition of glass pieces to the tube which pieces are formed in a particular way by a sol-gel process. The particles are pieces of glass, and are a porous substantially rigid amorphous inorganic sponge with substantial reactive surfaces. When a blood sample is introduced into a serum separation tube containing such pieces, the blood enters the interstices of the pieces causing fragmentation thereof, which fragmentation causes sound and shock waves which, in turn, enhance the clotting of the blood.
摘要:
Heat-insulating cellular glass having a surface on which an adhesive layer and a coating layer are formed. The adhesive layer comprises a solidified mixture of water glass, and a porous substance containing polyvalent ions of metals, such as Ca, Mg, Ba and Al, and the coating layer comprises a laminate of flakes of a laminar mineral. This cellular glass is widely used as a heat-insulating material having an improved thermal shock resistance.
摘要:
The method is characterized by moulding at least one slab of a thermoplastic, normally solid material under heat treatment against a matrix having a form substantially matching that of the final mirror to form a shell (6) introducing into the shell a material selected from the group consisting of; (1) glass bubbles of a thermoplastic, normally solid material; (2) a composition of a powder of a thermoplastic, normally solid material together with an expanding agent, and; (3) mixtures thereof, and bringing the glass bubbles and the powder particles of the composition resp., the latter after expansion, to adhere, on one hand to each other, and on the other to the shell to form a porous supporting structure. The mirror blank according to the invention comprises a shell (6) of a thermoplastic, normally solid material and a supporting structure of the material in said group filling the shell, the glass bubbles and the powder particles resp. being attached to each other and to the shell. If sheet glass is used for the shell and as a powder in the composition, the composition will further include 0-2% by weight of viscosity reducing Li.sub.2 CO.sub.3 and 4% by weight of CaCO.sub.3 as an expansion agent (all counted on the glass powder).
摘要:
An aqueous suspension of porous glass particles having a closely controlled average particle size within the range of about 0.7 to about 3.0 microns. The controlled particle size porous glass particles are prepared by initially milling course porous glass particles to yield particles of about 10 microns or less, leaching those particles to remove contaminants and residues, rinsing the particles, and then mixing the particles with an aqueous solution and subjecting the mixture to at least two controlled sedimentation steps.
摘要:
Biocidal glass materials are prepared from a mixture of boric oxide, aluminum oxide and cupric oxide in powdered form. After fusing the powder into glass, the glass is ground and deposited in a marine paint composition to provide a paint decomposition rate of 20 micrograms per hour in seawater.
摘要:
Glasses suitable for use as long term reinforcing agents for a cementitious matrix, e.g., Portland cement, or concrete. The glasses are preferably in the form of continuous filaments, short fibers, hollow spheres, or foamed glasses and have a composition consisting essentially of:______________________________________ Weight Percent ______________________________________ SiO.sub.2 20-70 TiO.sub.2 3-12 ZnO 5-70 CuO 0-10 Fe.sub.2 O.sub.3 0-5 BaO 0-30 CaO 0-10 MgO 0-15 Al.sub.2 O.sub.3 0-30 ______________________________________
摘要翻译:适用于水泥基质例如波特兰水泥或混凝土的长期增强剂的玻璃。 玻璃优选为连续长丝,短纤维,中空球体或泡沫玻璃的形式,并且具有基本上由以下组成的组成:}重量百分数} SiO 2 20-70} TiO 2 3-12} ZnO 5-70} CuO 0- 10} Fe2O3 0-5} BaO 0-30} CaO 0-10} MgO 0-15} Al2O3 0-30}
摘要:
Acid-resistant mortar compositions and selected products bonded therewith are provided wherein the mortar composition comprises a major portion of a cellular boro silicate glass powder, a silica sol, and a setting or hardening agent. Mortars of the invention are especially useful in bonding cellular glass bodies having a composition substantially identical to the boro silicate glass powder to provide bonded product arrays having excellent thermal shock characteristics.