发明名称 |
Method of making silicon nitride precursor. |
摘要 |
<p>A method of economically making silicon nitride precursor, comprising: (a) reacting silicon halide vapor with liquid ammonia at a situs (i.e., at a temperature of -20 to +40 DEG C) in an inert environment having a pressure equal to or greater than 241 kPa (35 psig), which environment is effectively devoid of organic contaminants, said reaction producing a mixture of precipitated silicon imide in liquid ammonia having dissolved ammonium halide; (b) extracting a portion of the mixture from the situs; and (c) separating the precipitate from the liquid of the portion. Preferably the silicon halide is SiCl4 and its vapor is brought into reaction with the liquid ammonia by way of a nonreactive carrier gas (N2 or argon). The proportioning of the SiCl4 and liquid ammonia is effective so that the exothermic heat of chloride-ammonia reaction substantially offsets the latent heat of vaporization of the ammonia into the residual carrier gas to provide a neutral heat balance or slight overall endothermic heat transfer.</p> |
申请公布号 |
EP0242188(A2) |
申请公布日期 |
1987.10.21 |
申请号 |
EP19870303289 |
申请日期 |
1987.04.14 |
申请人 |
FORD MOTOR COMPANY LIMITED;FORD FRANCE SOCIETE ANONYME;FORD-WERKE AKTIENGESELLSCHAFT |
发明人 |
CROSBIE, GARY MARK;PREDMESKY, RONALD LEONARD |
分类号 |
C01B21/068;C01B21/082;C01B21/087;(IPC1-7):C01B21/087 |
主分类号 |
C01B21/068 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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