ZrO2 foams for porous radiant burners

被引：14

作者：

Yesid Gomez, Sergio ^{[1
,2
]}

Escobar, J. A. ^{[1
]}

Alvarez, O. A. ^{[1
,2
]}

Rambo, C. R. ^{[3
,4
]}

de Oliveira, A. P. Novaes ^{[3
,4
]}

Hotza, D. ^{[3
,4
]}

机构：

[1] Univ Los Andes, Grp Mat & Manufacture CIPP CIPEM, Dept Mech Engn, Bogota, Colombia

[2] Univ Los Andes, GDPP, Dept Chem Engn, Bogota, Colombia

[3] Univ Fed Santa Catarina, Grp Ceram & Glass Mat CERMAT, Dept Chem, BR-88040900 Florianopolis, SC, Brazil

[4] Univ Fed Santa Catarina, Dept Mech Engn EQA EMC, BR-88040900 Florianopolis, SC, Brazil

来源：

JOURNAL OF MATERIALS SCIENCE | 2009年 / 44卷 / 13期

关键词：

CERAMIC FOAMS; BEHAVIOR;

D O I：

10.1007/s10853-009-3462-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

In this work, Y2O3-stabilized ZrO2 (YSZ) foams with low relative density were developed through the replication method, for application as porous radiant burners. The ceramic foams were produced by impregnation of open-cell polyurethane foams with aqueous suspensions and different fractions of raw materials: ZrO2-8% Y2O3 (8YSZ) powder, and additives. The materials were milled for 10-40 min. The impregnated foams were dried and submitted to a heat treatment for polyurethane elimination at 1000 A degrees C for 1 h, with subsequent sintering of the remaining ceramic structure at 1600 A degrees C for 2 h, which resulted in YSZ foams with low relative density (0.07). The structural analysis revealed a cellular structure with an average mechanical strength of 95.6 kPa. The radiation efficiency (> 19%) was obtained by tests with different air/fuel ratio. The ceramic matrixes exhibited high performance and structural integrity at high operation temperatures (1400 A degrees C).

引用

页码：3466 / 3471

页数：6

共 20 条

[1] Ashby M., 1997, CELLULAR SOLIDS STRU
[2] Heat recirculation and heat transfer in porous burners
Barra, AJ
Ellzey, JL
[J]. COMBUSTION AND FLAME, 2004, 137 (1-2) : 230 - 241
[3] BONE W, 1913, J FRANKLIN I, V2, P101
[4] BOTELLA M, 2005, REOLOGIA SUSPENSIONE
[5] FRACTURE-BEHAVIOR OF OPEN-CELL CERAMICS
BREZNY, R
GREEN, DJ
[J]. JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1989, 72 (07) : 1145 - 1152
[6] Durability of YZA ceramic foams in a porous burner
Elverum, PJ
Ellzey, JL
Kovar, D
[J]. JOURNAL OF MATERIALS SCIENCE, 2005, 40 (01) : 155 - 164
[7] Three-dimensional modelling of a two-layer porous burner for household applications
Hayashi, TC
Malico, I
Pereira, JCF
[J]. COMPUTERS & STRUCTURES, 2004, 82 (17-19) : 1543 - 1550
[8] High efficiency heat-recirculating domestic gas burners
Jugjai, S
Rungsimuntuchart, N
[J]. EXPERIMENTAL THERMAL AND FLUID SCIENCE, 2002, 26 (05) : 581 - 592
[9] MEASUREMENTS OF EMISSIONS AND RADIATION FOR METHANE COMBUSTION WITHIN A POROUS-MEDIUM BURNER
KHANNA, V
GOEL, R
ELLZEY, JL
[J]. COMBUSTION SCIENCE AND TECHNOLOGY, 1994, 99 (1-3) : 133 - 142
[10] Lucke C.E., 1913, The Journal of Industrial and Engineering Chemistry, V5, P801, DOI DOI 10.1021/IE50058A003

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