Full article: Synthesis of β-SiAlON materials from blast furnace slag ...
2024年11月30日 · The present study proposes a method for the preparation of β-SiAlON ceramic materials from blast furnace slag. This method involves an acetic acid leaching step followed by a carbothermal reduction-nitridation step.
Carbothermal synthesis, characterization, and mechanical …
2022年12月1日 · Various methods have been proposed for the synthesis and processing of β-SiAlON powders, which can be categorized into three main methods including direct reaction, vapor-phase synthesis and carbothermal reduction and nitridation (CRN) methods.
Carbothermal Preparation of β-SiAlON Powder at Elevated …
1999年2月1日 · β-SiAlON powders have been prepared by carbothermal nitridation of kaolin or SiO 2 plus Al 2 O 3 mixtures at 1450-1800°C and elevated nitrogen pressures (1-50 bar). Powders with widely variable particle size and morphology were obtained depending on temperature, pressure, gas-flow rate, and raw-material type.
Carbothermal synthesis of β-sialon from ... - ScienceDirect
2006年1月1日 · Reaction mixtures of halloysite clay and fine carbon for carbothermal reduction and nitridation (CRN) synthesis of β-sialon were ground in a planetary ball mill under flowing nitrogen for varying periods before being converted to sialon by …
Seeded silicon nitride powders obtained by carbothermal …
2023年4月5日 · One of the most promising methods for the production of non-oxide ceramic powders with important technical uses is the carbothermal reduction reaction (CRR). The process of carbothermal reduction and nitridation is a reaction between a mixture of carbon and SiO 2 precursors in a flowing atmosphere of N 2 in the temperature range of 1400–1500 °C.
Synthesis of SiAlON‐type compounds by carbothermal reduction …
2023年7月26日 · In this work we demonstrate how single phase or tailored compositions of SiAlON-type compounds can be achieved by carbothermal reduction and nitridation of the more reactive precursors. We introduce a synthesis route which not only uses a lower amount of carbon, but also can achieve complete reaction to form a single-phase SiAlON within 2 h.
Carbothermal production of beta'-sialon from nanosized powders
The production of β-sialon (Si3A1303N5) and nonoxidic powders by carbothermal reduction of oxides is discussed. Special attention is paid to the rate-determining steps in the conversion process...
(PDF) Synthesis of β-sialon/Ti (C, N) powders from mineral waste ...
2014年7月21日 · beta-sialon/Ti(C, N) composite powders were synthesized via carbothermal reduction nitridation method with low-grade bauxite and ilmenite as starting materials and coke as the reducing agent.
Of the number of methods available for the synthesis of 13'-sialon, carbothermal reduction of aluminosilicate minerals, accompanied by simultan- eous nitridation has the attraction of low raw mater- ials costs. Carbothermal production of sialon has been demonstrated from kaolinite [1], halloysite [2, 3], py-
Synthesis of Rod‐Like High‐Purity β‐Sialon Powder by a Novel ...
2010年4月15日 · Rod-like high-purity β-Sialon (Si6−zAlzOzN8−z, z=1,2,3) powders were synthesized from the mesoporous SiO2/C/Al2O3 composites, that were prepared using a nanocasting procedure, through a carbothermal reduction–nitridation method at 1420°C.
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