The application relates to bond materials for a grinding wheel, in particular a glass ceramic and a preparation method thereof, and a bond for the composite grinding wheel. The glass ceramic is prepared from raw materials comprising kaolin, silica, diboron trioxide, lithium superoxide, albite, potassium feldspar, talc, dolomite, phosphorus pentoxide, and yttrium oxide. A glass ceramic composed entirely of microcrystalline phases is obtained from the glass prepared by the above raw materials at 900-1020 C., achieving a complete conversion of the glass phase at a low temperature. The application also provides a bond for a composite grinding wheel, comprising glass ceramic and glass with mass ratio of (20-50):(50-80), the glass phase having a low flow temperature and, together with the glass ceramic phase, forming encapsulation of the abrasive particles, realizing low-temperature sintering of the grinding wheel. Microcrystalline phase in the bond results in high mechanical strength for the obtained grinding wheel.

The application relates to bond materials for a grinding wheel, in particular a glass ceramic and a preparation method thereof, and a bond for the composite grinding wheel. The glass ceramic is prepared from raw materials comprising kaolin, silica, diboron trioxide, lithium superoxide, albite, potassium feldspar, talc, dolomite, phosphorus pentoxide, and yttrium oxide. A glass ceramic composed entirely of microcrystalline phases is obtained from the glass prepared by the above raw materials at 900-1020 C., achieving a complete conversion of the glass phase at a low temperature. The application also provides a bond for a composite grinding wheel, comprising glass ceramic and glass with mass ratio of (20-50):(50-80), the glass phase having a low flow temperature and, together with the glass ceramic phase, forming encapsulation of the abrasive particles, realizing low-temperature sintering of the grinding wheel. Microcrystalline phase in the bond results in high mechanical strength for the obtained grinding wheel.

A method for producing fused silica including pre-heating silica sand by passing the silica sand through a gas flame, distributing the pre-heated silica sand to a furnace having an internal temperature of about 1,713 C. or greater to form molten fused silica, and cooling the molten fused silica by flowing the molten silica from the furnace into a water bath to produce fused silica particulates.

The invention discloses a method for preparing lead smelting slag glass-ceramics based on the oxidation of silicon-rich silicon smelting slag and composition adjustment, and belongs to the technical field of resource utilization of smelting slag rich in monatomic silicon. The method comprises the steps: mixing the silicon slag rich in monatomic silicon with an oxidant, a fluxing agent and a clarifying agent according to a formula ratio, ball-milling and screening to obtain a tempering raw material with uniform size, and performing high-temperature oxidation melting on the tempering raw material to form an oxidation-state molten tempering material; and carrying out further mixed melting on the molten tempering material and hot lead slag, carrying out water quenching to obtain basic glass, and carrying out heat treatment system on the obtained basic glass to form the glass ceramics. According to the method, the smelting slag rich in monatomic silicon is subjected to oxidation tempering and mixed melting with the hot lead slag to prepare the basic glass, and the glass ceramics are obtained by regulating and controlling the heat treatment system of the basic glass. The method is simple in technological process, high in production efficiency and low in cost, achieves the collaborative high-value conversion target of the silicon-rich silicon slag and the lead slag, and is easy to industrially popularize and apply.

Disclosed are a glass ceramic material, a preparation method thereof, and a denture. The glass ceramic material includes the following components by mass percentage: 58% to 72% of SiO.sub.2, 0% to 4% of Al.sub.2O.sub.3, 0% to 5% of Na.sub.2O, 3% to 8% of K.sub.2O, 8% to 17% of Li.sub.2O, 2.5% to 5% of P.sub.2O.sub.5, 0% to 2% of MgO, 0% to 2.5% of B.sub.2O.sub.3, 0% to 5% of ZnO and 0% to 3% of ZrO.sub.2. In the present application, by optimizing the composition and ratio of the glass ceramic material, and combining with a matching process system, it is possible to control the formation of lithium disilicate while the crystallinity of lithium metasilicate glass ceramic can be improved without an introduction of a high ratio of zirconia content, thereby improving the grinding performance of the glass ceramic. The present application is applicable to the field of material technology.

The invention discloses a method for preparing lead smelting slag glass-ceramics based on the oxidation of silicon-rich silicon smelting slag and composition adjustment, and belongs to the technical field of resource utilization of smelting slag rich in monatomic silicon. The method comprises the steps: mixing the silicon slag rich in monatomic silicon with an oxidant, a fluxing agent and a clarifying agent according to a formula ratio, ball-milling and screening to obtain a tempering raw material with uniform size, and performing high-temperature oxidation melting on the tempering raw material to form an oxidation-state molten tempering material; and carrying out further mixed melting on the molten tempering material and hot lead slag, carrying out water quenching to obtain basic glass, and carrying out heat treatment system on the obtained basic glass to form the glass ceramics. According to the method, the smelting slag rich in monatomic silicon is subjected to oxidation tempering and mixed melting with the hot lead slag to prepare the basic glass, and the glass ceramics are obtained by regulating and controlling the heat treatment system of the basic glass. The method is simple in technological process, high in production efficiency and low in cost, achieves the collaborative high-value conversion target of the silicon-rich silicon slag and the lead slag, and is easy to industrially popularize and apply.

Provided are a fluorescent glass ceramic with high transparency and a preparation method and use thereof. The fluorescent glass ceramic includes the following raw materials by mass percentage: 63 wt % to 70 wt % of SiO.sub.2, 13 wt % to 16 wt % of Li.sub.2O, 1 wt % to 6 wt % of Al.sub.2O.sub.3, 1 wt % to 10 wt % of K.sub.2O, 2 wt % to 6 wt % of P.sub.2O.sub.5, 0.5 wt % to 3.5 wt % of CeO.sub.2, 0 wt % to 4 wt % of an additive, 1 wt % to 4 wt % of a lanthanide oxide with an atomic number of 59 to 71, and 0 wt % to 8 wt % of a colorant. The fluorescent glass ceramic has a lithium metasilicate crystal as a principal crystalline phase, and the lithium metasilicate crystal has a layered or plate-like structure and a grain size of 0.1 ?m to 1.5 ?m.

The present disclosure is directed to glass spheroids and methods of making these spheroids that have significantly increased resilience to applied pressure and surface scratching. In addition, the present disclosure is directed to tailless Prince Rupert's Drops and methods of making tailless Prince Rupert's Drops.

Disclosed are a glass ceramic material, a preparation method thereof, and a denture. The glass ceramic material includes the following components by mass percentage: 58% to 72% of SiO.sub.2, 0% to 4% of Al.sub.2O.sub.3, 0% to 5% of Na.sub.2O, 3% to 8% of K.sub.2O, 8% to 17% of Li.sub.2O, 2.5% to 5% of P.sub.2O.sub.5, 0% to 2% of MgO, 0% to 2.5% of B.sub.2O.sub.3, 0% to 5% of ZnO and 0% to 3% of ZrO.sub.2. In the present application, by optimizing the composition and ratio of the glass ceramic material, and combining with a matching process system, it is possible to control the formation of lithium disilicate while the crystallinity of lithium metasilicate glass ceramic can be improved without an introduction of a high ratio of zirconia content, thereby improving the grinding performance of the glass ceramic. The present application is applicable to the field of material technology.

The present invention relates to a glass ceramic powder comprising i) a glass material formed from a glass mixture containing a lithium and oxygen containing compound selected from Li.sub.2O and/or Li.sub.2CO.sub.3, SiO.sub.2, K.sub.2O, La.sub.2O.sub.3, and ii) seed particles comprising Li.sub.2SiO.sub.3 crystals and/or Li.sub.2Si.sub.2O.sub.5 crystals. The present invention also relates to a method of manufacturing of said glass ceramic powder, a method for preparing compacted and sintered bodies from the glass ceramic powder and bodies obtainable by said method.