河南某低品位铝土矿制备β-SiAlON  

Synthesis of Bauxite Based β-SiAlON by Henan a Low Grade Bauxite

作　　者：郭艳芹[1] 王永伟[1] 

机构地区：[1]黄河科技学院工学院,郑州450063

出　　处：《硅酸盐通报》2013年第8期1510-1514,共5页Bulletin of the Chinese Ceramic Society

基　　金：河南省教育厅科学技术研究重点项目(12B430013)

摘　　要：分别以复合还原剂碳硅、碳铝还原氮化低品位铝土矿(Al2O3含量为68wt%)制备β-SiAlON。利用XRD、SEM和EDS等检测手段和试样的质量变化率,研究了两种复合还原剂制备β-SiAlON的相变过程、β-SiAlON的相对生成量和微观状态。结果表明:低品位的矾土矿利用复合还原剂可以制造出优良廉价的β-SiAlON材料;碳硅试样的β-SiAlON为O!-SiAlON和Al2O3反应生成;碳铝试样的β-SiAlON为AlN、Si3N4和Al2O3反应生成以及碳直接还原氮化莫来石生成;基本结束的反应温度为1500℃,生成的β-SiAlON为柱状、z值为3左右;复合还原剂碳硅还原氮化制备β-SiAlON相对含量高,结晶形貌好,制备成本低。With compound reducing agent carbon silicon,carbon aluminum nitride reduction of low grade bauxite （Al2O3 in 68wt% ） preparation of β-SiAlON, using mass change ratio of the specimens and XRD, SEM, EDS analysis. The results show that： Low grade bauxite mining by using compound reducing agent can produce excellent inexpensive β-SiAlON material; Using carbon silicon reducing agent β-SiAlON through O＇-SiAlON and Al2O3 reaction; Carbon aluminum specimen through AlN,Si3N4 and Al2O3 reaction formation of β-SiAlON, Carbon reduction and nitridation of mullite formation of β-SiAlON ; The end reaction temperature is 1500 ℃ ;The column β-SiAlON＇ z is about 3 ; Composite carbon silicon reduction nitridation preparation of β-SiAlON is better, Generation of β-SiAlON is higher; the production cost of silicon carbon sample price low.

关 键 词：低品位铝矾土 Β-SIALON 复合还原剂 还原氮化反应 

分 类 号：TU991[建筑科学—市政工程]