Search Results - "Alt, Nicolas S. A."

Novel alkali metal amidogallates as intermediates in ammonothermal GaN crystal growth by Zhang, Shiyu, Alt, Nicolas S.A., Schlücker, Eberhard, Niewa, Rainer

“…Single crystals of lithium tetra-amidogallate, Li[Ga(NH2)4], were obtained from the reaction of Ga metal and LiNH2 in supercritical ammonia at a pressure of…”
Get full text

Development of a novel in situ monitoring technology for ammonothermal reactors by Alt, Nicolas S.A., Meissner, Elke, Schluecker, Eberhard

“…A high pressure optical cell is presented, which allows in situ optical measurements in the ammonothermal process under real reaction conditions up to 200MPa…”
Get full text

Feasibility of density and viscosity measurements under ammonothermal conditions by Steigerwald, Thomas G., Alt, Nicolas S.A., Hertweck, Benjamin, Schluecker, Eberhard

“…With an eye on numerical simulations of ammonothermal growth of group III–V bulk single crystals, precise data for viscosity and density are strongly needed…”
Get full text

Experimental Characterization of a Flow‐through Pulsation Damper Regarding Pressure Pulsations and Vibrations by Koegler, Andreas F., Haselmann, Daniel, Alt, Nicolas S. A., Schluecker, Eberhard

“…Pressure attenuators, especially side branch bladder‐type accumulators, for suppression of pressure pulsations in industrial fluid applications are not…”
Get full text

Ammonothermal Synthesis and Crystal Structures of Diamminetriamidodizinc Chloride [Zn2(NH3)2(NH2)3]Cl and Diamminemonoamidozinc Bromide [Zn(NH3)2(NH2)]Br by Richter, Theresia, Strobel, Sabine, Alt, Nicolas, Schlücker, Eberhard, Niewa, Rainer

“…The treatment of excess zinc in the presence of ammonium chloride under ammonothermal conditions of 873 K and 97 MPa leads to diamminetriamidodizinc chloride…”
Get full text

Ammonothermal Synthesis of Novel Nitrides: Case Study on CaGaSiN3 by Häusler, Jonas, Neudert, Lukas, Mallmann, Mathias, Niklaus, Robin, Kimmel, Anna‐Carina L., Alt, Nicolas S. A., Schlücker, Eberhard, Oeckler, Oliver, Schnick, Wolfgang

“…The first gallium‐containing nitridosilicate CaGaSiN3 was synthesized in newly developed high‐pressure autoclaves using supercritical ammonia as solvent and…”
Get full text

Three Solid Modifications of Ba[Ga(NH2)4]2: A Soluble Intermediate in Ammonothermal GaN Crystal Growth by Hertrampf, Jan, Alt, Nicolas S. A., Schlücker, Eberhard, Niewa, Rainer

“…Ammonothermally grown GaN crystals are highly demanded as superior substrates for manufacturing high‐performance blue and white LEDs. Ba or Ba(NH2)2 can act as…”
Get full text

Trigonal-Bipyramidal Coordination in First Ammoniates of ZnF2: ZnF2(NH3)3 and ZnF2(NH3)2 by Richter, Theresia M. M, LeTonquesse, Sylvain, Alt, Nicolas S. A, Schlücker, Eberhard, Niewa, Rainer

“…Single crystals of ZnF2(NH3)3 and ZnF2(NH3)2 were obtained under ammonothermal conditions (250 °C, 196 MPa and 500 °C, 136 MPa). Upon thermal decomposition of…”
Get full text

Ammonothermal Synthesis of Novel Nitrides: Case Study on CaGaSiN 3 by Häusler, Jonas, Neudert, Lukas, Mallmann, Mathias, Niklaus, Robin, Kimmel, Anna-Carina L, Alt, Nicolas S A, Schlücker, Eberhard, Oeckler, Oliver, Schnick, Wolfgang

“…The first gallium-containing nitridosilicate CaGaSiN was synthesized in newly developed high-pressure autoclaves using supercritical ammonia as solvent and…”
Get full text

Inside Cover: Ammonothermal Synthesis of Novel Nitrides: Case Study on CaGaSiN3 (Chem. Eur. J. 11/2017) by Häusler, Jonas, Neudert, Lukas, Mallmann, Mathias, Niklaus, Robin, Kimmel, Anna‐Carina L., Alt, Nicolas S. A., Schlücker, Eberhard, Oeckler, Oliver, Schnick, Wolfgang

“…New high‐temperature autoclaves were developed for the ammonothermal synthesis of innovative multinary nitrides. The cover picture shows various in‐house…”
Get full text

Electro Discharge Machining – A Suitable Fabrication Process for High‐Pressure/High‐Temperature Equipment by Hertweck, Benjamin, Kimmel, Anna-Carina L., Steigerwald, Thomas G., Alt, Nicolas S. A., Schlücker, Eberhard

“…Electro discharge machining (EDM) is an important manufacturing process for hard‐to‐cut materials like nickel‐based alloys, e.g., alloy 718. Its high yield…”
Get full text

Ammonothermal Synthesis and Characterization of Li4[Zn(NH2)4](NH2)2 by Richter, Theresia M. M., Alt, Nicolas S. A., Schlücker, Eberhard, Niewa, Rainer

“…Single crystals of Li4[Zn(NH2)4](NH2)2 were obtained from Li and Zn under ammonothermal conditions (723 K and 1.58 kbar). Li4[Zn(NH2)4](NH2)2 (C2221, a =…”
Get full text

Ammonothermal Synthesis and Characterization of Cs2[Zn(NH2)4] by Richter, Theresia M. M., Alt, Nicolas S. A., Schlücker, Eberhard, Niewa, Rainer

“…Cs2[Zn(NH2)4] was synthesized under ammonothermal conditions (sc‐NH3, 523 K, 155 MPa) from CsNH2 and Zn. Growth of cm‐sized crystals succeeded upon application…”
Get full text

Cover Picture: Ammonothermal Synthesis and Characterization of Cs2[Zn(NH2)4] (Z. Anorg. Allg. Chem. 21/2016) by Richter, Theresia M. M., Alt, Nicolas S. A., Schlücker, Eberhard, Niewa, Rainer

“…The cover picture shows the [Zn(NH2)4]2− ion in front of a several cm large crystal aggregate of Cs2[Zn(NH2)4] obtained from supercritical ammonia in a…”
Get full text

Ceramic liner technology for ammonoacidic synthesis by Hertweck, Benjamin, Schimmel, Saskia, Steigerwald, Thomas G., Alt, Nicolas S.A., Wellmann, Peter J., Schluecker, Eberhard

“…•Corrosion behaviour of several ceramics under ammonothermal conditions.•Technical ceramics include: nitride and nitride bonded silicon carbide…”
Get full text

Different corrosion behaviour of autoclaves made of nickel base alloy 718 in ammonobasic and ammonoacidic environments by Hertweck, Benjamin, Steigerwald, Thomas G., Alt, Nicolas S.A., Schluecker, Eberhard

“…•Metallographic investigation of corrosion behaviour of ammonothermal autoclaves.•Ammonobasic conditions lead to formation of corrosion layer.•Ammonoacidic…”
Get full text

Solubility and dissolution kinetics of GaN in supercritical ammonia in presence of ammonoacidic and ammonobasic mineralizers by Schimmel, Saskia, Koch, Martina, Macher, Philipp, Kimmel, Anna-Carina L., Steigerwald, Thomas G., Alt, Nicolas S.A., Schlücker, Eberhard, Wellmann, Peter

“…•Solubility and dissolution kinetics of GaN under ammonoacidic and -basic conditions.•Results suggest a significant refinement of raw gravimetric literature…”
Get full text

SrBa2(NH2)6: A New Ternary Amide from Ammonothermal Synthesis by Hertrampf, Jan, Alt, Nicolas S. A., Schlücker, Eberhard, Niewa, Rainer

“…Single crystals of SrBa2(NH2)6 were obtained from the reaction of barium and strontium metal under ammonothermal conditions at a pressure of 180 MPa and a…”
Get full text

Chemical stability of carbon-based inorganic materials for in situ x-ray investigations of ammonothermal crystal growth of nitrides by Schimmel, Saskia, Künecke, Ulrike, Meisel, Magnus, Hertweck, Benjamin, Steigerwald, Thomas G., Nebel, Christoph, Alt, Nicolas S.A., Schlücker, Eberhard, Wellmann, Peter

“…The chemical stability of diamond, silicon carbide, vitreous carbon, and boron carbide in supercritical ammonia containing different mineralizers was…”
Get full text

Corrosive Degeneration of Autoclaves for the Ammonothermal Synthesis: Experimental Approach and First Results by Hertweck, Benjamin, Steigerwald, Thomas G., Alt, Nicolas S. A., Schluecker, Eberhard

“…The ammonothermal growth of different bulk group III nitride materials enables cost‐efficient production of high‐quality single crystals. Despite its…”
Get full text