摘要:
Provided is a process of forming a vanilla extract wherein green ripe vanilla beans are exposed to a high drying temperature, extracted with a solvent, and treated with beta-glucosidase enzyme to convert glucovanillin to vanillin enzymatically, thereby providing a vanilla extract with a good vanillin yield and complex well-balanced vanilla aroma lacking undesirable off-notes.
摘要:
A cermet composition useful in the form of a thin-film as a strain gage consists of 65%-70% by weight chromium, 18%-32% by weight silicon monoxide, and 3%-12% by weight nickel, deposited by vacuum evaporation. After initial deposition, vacuum annealing is accomplished, or, if a more positive TCR and TSS is required, the annealing can be repeated at a higher temperature.
摘要:
A method and a device for the continuous production of glass and glass ceramic products from a glass melt is provided, which simplifies the changing between two kinds of glass. The device includes a melting crucible and an induction coil, which preferably extends around the melting crucible in order to heat a glass melt by means of an induction field generated by the induction coil. The wall elements, which form the side wall of the crucible, have cooling channels, through which a cooling fluid can be conducted, so that the glass melt solidifies on the side wall and forms a skull layer. The interior side of the wall elements is formed at least in part by an aluminum nitride-containing ceramic.
摘要:
A method and device for nozzle-injection of gas into molten glass is disclosed wherein a gas stream is introduced into the molten glass in a temporally pulsed throughput such that the gas stream is interrupted between two sequential pulses, the duration of each pulse amounting to less than one second.
摘要:
Provided is a process of forming a vanilla extract wherein green ripe vanilla beans are exposed to a high drying temperature, extracted with a solvent, and treated with beta-glucosidase enzyme to convert glucovanillin to vanillin enzymatically, thereby providing a vanilla extract with a good vanillin yield and complex well-balanced vanilla aroma lacking undesirable off-notes.
摘要:
The invention relates to a method and apparatus for the production of high-melting glass materials or high-melting glass ceramic materials by a process during which a temperature of a molten mass exceeds 1,760° C., wherein a shard material or raw material is molten to a molten mass, the molten mass is fined, and the molten mass emerges via a tubular outlet made of iridium or an iridium alloy having an iridium content of at least 50 wt.-%. According to the invention the temperature of a section of said tubular outlet, which is in contact with the ambient atmosphere having a natural gas composition, is controlled or regulated such that said temperature is held below 1,000° C. except during pouring out the molten mass out of said tubular outlet. Thus, an oxidative decomposition of the apparatus can be prevented.
摘要:
The invention relates to a device for the production of high-melting glass materials or high-melting glass ceramic materials, comprising a vessel for accommodating molten glass and a container that accommodates the vessel, whereby the vessel has a tubular outlet. According to the invention, the device is characterised by the fact that the vessel and a first section of the tubular outlet if formed of iridium or a material with a high iridium content, whereby the container is designed to accommodate the vessel and the first section of the tubular outlet under a protective gas atmosphere. The invention also relates to a corresponding method. The molten glass is shaped into a formed part in a discontinuous operation. The choice of the material for the vessel used as the crucible allows the attainment of high temperatures according to the invention which enables glass materials or glass ceramic materials with a much higher spectral transmission in the visible wavelength range. The use of an inert protective gas enables the prevention of unwanted oxide formation on the vessel and the tubular outlet. According to the invention, the glass can be used as a transitional glass between types of glass with very different coefficients of thermal expansion.
摘要:
A method and a device for the continuous production of glass and glass ceramic products from a glass melt is provided, which simplifies the changing between two kinds of glass. The device includes a melting crucible and an induction coil, which preferably extends around the melting crucible in order to heat a glass melt by means of an induction field generated by the induction coil. The wall elements, which form the side wall of the crucible, have cooling channels, through which a cooling fluid can be conducted, so that the glass melt solidifies on the side wall and forms a skull layer. The interior side of the wall elements is formed at least in part by an aluminum nitride-containing ceramic.