摘要:
A method for making a glass ceramic, optoelectronic material such as a clad optical fiber or other component for use in an optoelectronic device. The method comprises preparing a glass composition batch to yield a precursor glass for a nanocrystalline glass-ceramic that is doped with at least one kind of optically active ion, such as a transition metal or lanthanide element; melting the batch; forming a glass cane; surrounding the cane with a chemically inert cladding material shaped in the form of a tube; drawing a glass fiber from the combined precursor-glass “cane-in-tube” at a temperature slightly above the liquidus of the precursor glass composition, and heat treating at least a portion of the drawn clad glass fiber under conditions to develop nanocrystals within the core composition and thereby forming a glass ceramic.
摘要:
A waveguide structure includes a glass body and a waveguide pattern formed in the glass body by irradiating a predetermined track on the glass body with sufficient energy to grow a crystalline phase along the predetermined track.
摘要:
The present invention is directed at a glass-ceramic having high strength and toughness and containing miserite as a predominant crystal phase. The glass-ceramic has a composition calculated in terms of a weight percent on the oxide basis comprising 40-68% SiO.sub.2, 12-35% CaO, 8-20% CaF.sub.2, 4-10.5% K.sub.2 O, 0-5% Al.sub.2 O.sub.3, 0-5% B.sub.2 O.sub.3, 0-15% P.sub.2 O.sub.5, 0-4% R.sub.2 O.sub.3, wherein R represents Y.sup.3+ and rare earth metals in the lanthanide series, and 0-5% of optional constituents selected from the group consisting of MgO, SrO, BaO, Na.sub.2 O, Nb.sub.2 O.sub.5, ZrO.sub.2, and ZnO, and 0-10% of optional constituents selected from the group consisting of Nb.sub.2 O.sub.5 and TiO.sub.2 and 0-2% Li.sub.2 O as an optional constituent. The glass-ceramic may contain secondary phases of cristobalite (SiO.sub.2), fluorite (CaF.sub.2), xonotlite (Ca.sub.6 Si.sub.6 O.sub.17 F.sub.2), and fluorapatite (Ca.sub.5 (PO.sub.4).sub.3 F), and small amounts of other calcium silicate phases such as wollastonite (CaSiO.sub.3).
摘要翻译:本发明涉及具有高强度和韧性的玻璃陶瓷,并且含有苦ite石作为主要结晶相。 玻璃陶瓷具有以氧化物为基准的重量百分比计算的组成,包括40-68%SiO 2,12-35%CaO,8-20%CaF 2,4-10.5%K 2 O,0-5%Al 2 O 3,0 -5%B2O3,0-15%P2O5,0-4%R2O3,其中R代表Y3 +,镧系中的稀土金属和0-5%选自MgO,SrO,BaO, Na 2 O,Nb 2 O 5,ZrO 2和ZnO,以及选自Nb 2 O 5和TiO 2以及0-2%Li 2 O作为任选成分的0-10%的任选成分。 玻璃陶瓷可以含有方英石(SiO 2),萤石(CaF 2),黑云母(Ca 6 Si 6 O 17 F 2)和氟磷灰石(Ca 5(PO 4)3 F))和少量其它硅酸钙相如硅灰石(CaSiO 3)的次相。
摘要:
This invention is directed toward of a glass-ceramic article consisting essentially, expressed in terms of weight percent on the oxide basis, of about 64-70% SiO.sub.2, 18-22% Al.sub.2 O.sub.3, 3.3-4% Li.sub.2 O, 2-5% ZnO, 0-2% MgO, 1.5-3.5% ZrO.sub.2, 0.5-2.5% TiO.sub.2, 3.5-4.5% ZrO.sub.2 +TiO.sub.2, 0.5-1.5% As.sub.2 O.sub.5 and 0-0.5% SnO.sub.2. The glass-ceramic article disclosed herein, is comprised of adjacent areas which exhibit visible transmissions ranging from transparent-to-opaque. The transparent areas are clear, transparent and essentially colorless and contain stuffed .beta.-quartz as essentially the sole crystal phase. On the other hand, the translucent-to-opaque areas contain .beta.-spodumene as the predominant crystal phase with a minor amounts of gahnite crystals resulting from the thermal transformation of said stuffed .beta.-quartz. This gahnite phase is present in an amount sufficient to compensate for the transformation of said stuffed .beta.-quartz to .beta.-spodumene, resulting in a dimensional change, expressed in terms of density change, of essentially zero.
摘要:
A composition for a glass-ceramic material that contains a crystallinity of at least about 30% by weight of forsterite components at a liquidus temperature of about 1525° C. or below. The glass-ceramic has a composition, in weight percent on an oxide basis, consisting essentially of about: 40-60% SiO2; 10-25% Al2O3; 18-30% MgO; 3-10% Na2O; 0-10% K2O; >5-15% TiO2. The invention further comprises a method for achieving high crystalline yield at such a low liquidus with increased solubility of high levels of chromium ions. The glass-ceramics can be used in drawing optical fibers and as gain media in amplifier and laser devices for near infrared wavelengths.
摘要:
A gain medium for use in optical amplifiers or laser oscillators is disclosed. The gain medium includes a transition-metal doped glass-ceramic material having a crystal phase and a glass phase. The crystal phase is formed in situ in the glass phase, with the transition metal ions preferentially partitioning into the crystals from the glass phase. The crystals so formed have a size of less than 50 nm, and the transition metal ions within them are capable of lasing at a wavelength within the range of about 900 to 3000 nm. Also disclosed are amplifier and laser oscillator configurations, where the glass-ceramic gain medium is applied in a variety of configurations. Also disclosed is a method of amplifying a signal of light wherein the glass-ceramic gain medium is pumped with light energy so as to excite the transition metal ions, and the signal of light is transmitted through the gain medium while the transition metal ions are excited, whereby the signal of light is amplified. Also disclosed is a method of producing laser oscillation wherein the glass-ceramic gain medium is included in a laser cavity, pumped with optical energy to excite the transition metal ions, and the resulting radiation is forced to oscillate by the use of reflecting surfaces for feedback.
摘要:
A family of synthetic mica glass-ceramic compositions is disclosed based on a modified sodium fluoromontmorillonoid stoichiometry. These are spontaneously crystallizable glass-ceramics which are composed of 50-62% SiO.sub.2, 20-28% MgO, 5-15% Na.sub.2 O, and 8-13% F. The method comprises supplying excess fluoride during melting to devise a synthetic mica having sodium fluoromontmorillonoid or a solid solution on the talc axis as the dominant crystal phase.
摘要:
This invention is directed to the production of glass-ceramic articles exhibiting great toughness, a modulus of rupture of at least 20,000 psi, and, in the form of bars having dimensions 5".times.0.5".times.0.1", sagging during the crystallization heat treatment of no more than 0.2" over a 4" span, and wherein potassium fluorrichterite constitutes the predominant crystal phase but wherein cristobalite is also present in an amount of at least 10% by volume. The inventive articles having an overall composition consisting essentially, in weight percent on the oxide basis, of:______________________________________ SiO.sub.2 65-69 Na.sub.2 O 1.5-3.3 Al.sub.2 O.sub.3 0.75-3.5 K.sub.2 O 4.2-6.0 MgO 13.5-17.5 BaO 0-2.5 CaO 3-4.8 P.sub.2 O.sub.5 `0-2.5 Li.sub.2 O 0.5-2.0 F 3.3-5.5 ______________________________________
摘要翻译:本发明涉及生产具有很高韧性,断裂模量至少20,000psi的玻璃陶瓷制品,以及具有尺寸为5'0.5'0.1“的条形状的下垂 在结晶热处理期间在4“跨度处不超过0.2”的结晶热处理中,并且其中氟代氟铁矿构成主要结晶相,但其中方英石也以至少10体积%的量存在。 具有基本上以氧化物为基准的重量百分数的本发明制品为:-SiO 2 65-69 Na 2 O 1.5-3.3 -Al 2 O 3 0.75-3.5 K 2 O 4.2-6.0 -MgO 13.5-17.5 BaO 0-2.5 -CaO 3 -4.8 P2O5'0-2.5 -Li2O 0.5-2.0 F 3.3-5.5 -
摘要:
Nanocrystalline glass-ceramic materials based on .beta.-quartz solid solution Mg-rich phases formed in the system SiO.sub.2 --Al.sub.2 O.sub.3 --MgO--Li.sub.2 O--TiO.sub.2 (ZnO, BaO, ZrO.sub.2, P.sub.2 O.sub.5). Articles made from the glass-ceramic materials exhibit a crystal phase assemblage of a fine-grained, microstructure which is predominantly .beta.-quartz, and at least one additional phase selected from enstatite and spinel, and having a composition which consists essentially of, in weight percent on the oxide basis, 40-65% SiO.sub.2, 10-14% Al.sub.2 O.sub.3, 5-25% MgO, 0.5-4% Li.sub.2 O, 5-15% TiO.sub.2, and up to 5% ZrO.sub.2, such that the sum of (TiO.sub.2 +ZrO.sub.2) is at least 9% The glass-ceramide article is particularly useful for memory disk applications.
摘要:
This invention is directed at glass-ceramic articles, and methods for producing such articles, exhibiting Young's modulus between about 14 to 24.times.10.sup.6 psi and a fracture toughness in excess of 1.0 MPa.sqroot. in. The crystal phase assemblage is comprised predominately of generally uniformly-sized spinel-type crystals which are uniformly dispersed within a highly siliceous residual glass matrix phase. The composition of these glass-ceramic articles is consists essentially, expressed in terms of weight percent on the oxide basis, of 35-60% SiO.sub.2, 20-35% Al.sub.2 O.sub.3, 0-25% MgO, 0-25% ZnO, at least about 10% MgO+ZnO, 0-20% TiO.sub.2, 0-10% ZrO.sub.2, 0-2% Li.sub.2 O and 0-8% NiO. However, if the Al.sub.2 O.sub.3 constituent is present in an amount less than about 25%, the TiO.sub.2 +ZrO.sub.2 +NiO amount should be at least 5%. The composition may also contain up to 5% of optional constituents selected from the group consisting of BaO, CaO, PbO, SrO, P.sub.2 O.sub.5, B.sub.2 O.sub.3, Ga.sub.2 O.sub.3, 0-5% R.sub.2 O and 0- 8% of a transition metal oxide; the R.sub.2 O selected from the group consisting of Na.sub.2 O, K.sub.2 O, Rb.sub.2 O and C.sub.2 O.
摘要翻译:本发明涉及玻璃陶瓷制品,以及用于制造这种制品的方法,其展示杨氏模量在约14至24×10 6 psi之间,断裂韧性超过1.0MPa 2ROOT in。晶相组合主要由通常均匀的尺寸 均匀分散在高度硅质残留玻璃基质相中的尖晶石型晶体。 这些玻璃陶瓷制品的组成基本上以氧化物的重量百分比表示,包括35-60%SiO 2,20-35%Al 2 O 3,0-25%MgO,0-25%ZnO,至少 约10%的MgO + ZnO,0-20%的TiO 2,0-10%的ZrO 2,0-2%的Li 2 O和0-8%的NiO。 然而,如果Al 2 O 3组分以小于约25%的量存在,则TiO 2 + ZrO 2 + NiO的量应至少为5%。 该组合物还可以含有高达5%的选自BaO,CaO,PbO,SrO,P 2 O 5,B 2 O 3,Ga 2 O 3,0-5%R 2 O和0-8%的过渡金属氧化物的任选成分; R2O选自Na2O,K2O,Rb2O和C2O。