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Siemens Aktiengesellschaft

Michael Hoffmann

Wolfram Beele

Ulrich Bast

Peter Greil

Karl Kempter

Fritz Aldinger

Thomas Haubold

Beate Heimberg

Axel Endriss

Chu-Wan Hong

Hans J Seifert

Helmut Goldmann

Klaus Müllen

Markus Klapper

Stephan Barcikowski

Dennis Langanke

Robert Maurer

Christin Menneking

Simon Stelzig

Copolymer-modified nanoparticles produced by a process in which nanoparticles are ablated by laser radiation from a surface of a substrate in a liquid include an amphiphilic copolymer.

Copolymer-modified nanoparticles, especially for use in medical articles

An apparatus for replacing or changing a shaving blade secured or securable to a blade holder beam of an ice resurfacing machine via a plurality of screws, and including a blade carrier. For each of the screws, the blade carrier is provided with a respective fixing element configured to cooperate with a head of that screw. The fixing elements reliably fix these screws in a prescribed position.

Apparatus for replacing or changing a shaving blade secured to a blade holder of an ice resurfacing machine

The invention relates to a product ( ), particularly a gas turbine blade that can be exposed to a hot aggressive gas ( ). The product ( ) has a metallic basic body ( ), which is provided with a thermal barrier coating ( ) having a spinel of the composition AB O .

Product, especially a gas turbine component, with a ceramic heat insulating layer

An article that is particularly well suited for use as a gas turbine engine component has a metallic substrate and a ceramic thermal barrier layer including a mixed metal oxide system comprising a compound selected from the group consisting of (i) a lanthanum aluminate and (ii) a calcium zirconate, the calcium in which is partially replaced by at least one calcium-substitute element, such as strontium (Sr) or barium (Ba). In addition, the lanthanum in the lanthanum aluminate can be partially replaced by a lanthanum-substitute element from the lanthanide group, particularly gadolinium (Gd). A process for producing such an article comprises providing a pre-reacted mixed metal oxide system as described above and applying it to the substrate by plasma spraying or an evaporation coating process.

Process for producing a ceramic thermal barrier layer for gas turbine engine component

Ceramic thermal barrier layer for gas turbine engine component

A demodulator circuit for demodulating an input signal constituted by a modulated carrier. The circuit is provided with a phase control loop composed of a signal mixer having two inputs and an output and providing a signal at its output proportional to the algebraic product of the signals at its inputs, one of the mixer inputs being arranged to receive the demodulator circuit input signal, a voltage controlled oscillator having a control input and an output connected to the other input of the mixer and providing a signal at a frequency varying linearly with the voltage at its control input, and a lowpass filter connected between the mixer output and the oscillator control input. The components of the loop present a set of parameters defining the operation of the loop, which parameters include the peak voltage at the output of the oscillator, the oscillator modulation sensitivity, the voltage amplification factor of the lowpass filter and the gain of the mixer. Circuit devices are connected to the loop for varying at least one of the parameters in inverse proportion to the peak amplitude of the input signal carrier for causing the product of the parameters and the carrier peak amplitude to be substantially constant.

Demodulator circuit with phase control loop

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Böblingen, Germany

Michael Hoffmann