ali abdali (4 Ergebnisse)

Taschenbuch. Zustand: Sehr gut. Gebraucht - Sehr gut - ungelesen,als Mängelexemplar gekennzeichnet, mit leichten Mängeln an Schnitt oder Umschlag durch Lager- oder Transportschaden -The gas-phase kinetics of the decomposition of tetraethoxysilane (TEOS) and hexamethyldisiloxane (HMDSO) and the formation and growth of silica nanoparticles were studied. The kinetics study was carried out in shock-heated gases with species measurements by high-repetition-rate time-of-flight mass spectrometry. The mass spectra indicate the formation of Si(OH)4 from the decomposition of TEOS while during HMDSO decomposition several Silicon-containing species were found, such as Si atoms, SiO and SiCH3. The ignition-delay time of the precursors in oxygen-containing bath gases was studied by observing the OH\* emission signal behind the reflected shock wave. The ignition delay times of TEOS and HMDSO are strongly temperature dependent and the Arrhenius parameters were determined. Silica-particle formation and growth from TEOS and HMDSO were investigated in a hybrid microwave-plasma hot-wall reactor and a low-pressure premixed H2/O2/Ar flame reactor by in-situ and ex-situ measurements. Particle sizes distributions were determined by particle mass spectrometry and the spatial gas-phase temperature distribution was measured with multi-line NO-LIF thermometry. The present research work provides data and new understanding of TEOS and HMDSO decomposition kinetics and particle formation and growth of silica nanoparticles in the gas-phase. These data can be used as input for computational fluid dynamics simulations and hence for the design of reactors for the gas-phase synthesis of highly specific nanoparticles.Books on Demand GmbH, Überseering 33, 22297 Hamburg 138 pp. Englisch.

Zustand: Hervorragend. Zustand: Hervorragend | Sprache: Englisch | Produktart: Bücher | The gas-phase kinetics of the decomposition of tetraethoxysilane (TEOS) and hexamethyldisiloxane (HMDSO) and the formation and growth of silica nanoparticles were studied. The kinetics study was carried out in shock-heated gases with species measurements by high-repetition-rate time-of-flight mass spectrometry. The mass spectra indicate the formation of Si(OH)4 from the decomposition of TEOS while during HMDSO decomposition several Silicon-containing species were found, such as Si atoms, SiO and SiCH3. The ignition-delay time of the precursors in oxygen-containing bath gases was studied by observing the OH* emission signal behind the reflected shock wave. The ignition delay times of TEOS and HMDSO are strongly temperature dependent and the Arrhenius parameters were determined. Silica-particle formation and growth from TEOS and HMDSO were investigated in a hybrid microwave-plasma hot-wall reactor and a low-pressure premixed H2/O2/Ar flame reactor by in-situ and ex-situ measurements. Particle sizes distributions were determined by particle mass spectrometry and the spatial gas-phase temperature distribution was measured with multi-line NO-LIF thermometry. The present research work provides data and new understanding of TEOS and HMDSO decomposition kinetics and particle formation and growth of silica nanoparticles in the gas-phase. These data can be used as input for computational fluid dynamics simulations and hence for the design of reactors for the gas-phase synthesis of highly specific nanoparticles.

Soft cover. Zustand: Very Good. Original business card. Slightly stained. 5x8,5 cm. In Arabic and French. On card, engraved his tughra (dated 1331 Hegira), and the sign of Lahej sultanate. No photo. Lahej was a Sheikdom based in Lahej in Southern Arabia. The Sultanate became self-ruled in 1728 and gained independence in 1740. In 1839, the Sultanate became the Protectorate of Aden of the British Empire, though nominally the 'Abdali Sultan retained his status. The the Protectorate of Aden was briefly ruled again by the Ottomans during World War I, but regained by the British and absorbed into Federation of South Arabia in 1963. The 'Abdali dynasty was officialy abolished in 1967, through the proclamation by South Yemen. Hegira: 1331 = Gregorian: 1915.

Soft cover. Zustand: Very Good. Original business card. 6x9,5 cm. In Arabic and French. On card, engraved b/w portrait photo of Sultan, his tughra (dated 1331 Hegira), and the sign of Lahej sultanate. Lahej was a Sheikdom based in Lahej in Southern Arabia. The Sultanate became self-ruled in 1728 and gained independence in 1740. In 1839, the Sultanate became the Protectorate of Aden of the British Empire, though nominally the 'Abdali Sultan retained his status. The the Protectorate of Aden was briefly ruled again by the Ottomans during World War I, but regained by the British and absorbed into Federation of South Arabia in 1963. The 'Abdali dynasty was officialy abolished in 1967, through the proclamation by South Yemen. Hegira: 1331 = Gregorian: 1915.