Characterisation of the pyrolysis process of boron-containing ormosils by FT-IR analysis

被引：13

作者：

Alonso, RP ^{[1
]}

Rubio, F ^{[1
]}

Rubio, J ^{[1
]}

Oteo, JL ^{[1
]}

机构：

[1] CSIC, Inst Ceram & Vidrio, Madrid 28049, Spain

来源：

JOURNAL OF ANALYTICAL AND APPLIED PYROLYSIS | 2004年 / 71卷 / 02期

关键词：

SiBOC; FT-IR; pyrolysis;

D O I：

10.1016/j.jaap.2003.11.002

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The sol-gel method was used to prepare four different silicon-boron containing gels to obtain monolithic Ormoborosil (organically modified borosilicate) materials. These Ormoborosils were treated under flowing nitrogen at different temperatures from 200 to 1100 degreesC to produce mixed vitreous oxycarbides of silicon and boron. Fourier transform-infrared spectroscopy (FT-IR) was used to study the structural changes that take place at every studied temperature. Results have shown that boron atoms are bonded preferentially to silicon atoms in the PDMS units. The increase of the boron content in the Ormoborosil network produces a decrease of the mineralisation temperature. Moreover, it has been observed that boron promotes the formation of oxycarbide structures and avoids the formation of a free carbon phase in the oxycarbide network. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：827 / 845

页数：19

共 45 条

[1] POLYMERS WITH INORGANIC PRIMARY MOLECULAR CHAINS [J].