Silicon nitride ua ke nrog silicon carbide kiln muaj cov yam ntxwv ntawm qhov kub thiab txias, zoo thermal poob siab, yooj yim deformation, oxidation tsis kam, corrosion kuj, thermal conductivity thiab lwm yam.
Main Performance indicators, As
Yam khoom | Firebrick Index | Cov specification | Index ntawm cov khoom zoo li tus |
Pom tseeb porosity(%) | <16 | <16 | <14 |
Qhov ntom ntom(g/cm3) | 22.65 Nws | 22.65 Nws | 2 2.68 ib |
Compressive zog ntawm chav tsev kub(MPa) | 2 160 | 2170 ib | 2 180 |
Khoov lub zog ntawm chav tsev kub(1 400 X:) MPa | 2 40 | 2 45 | 2 45 |
Kub kub dabtsi yog khoov zog(14 00r) MPa | 2 50 | 2 50 | 2 50 |
Coefficient ntawm thermal expansion(110 TSI)xioVC | <4.18 | <4.18 | <4.18 |
Thermal conductivity(1100C ua) | 216 | 216 | 216 |
Refractories(°C ) | 1800 | 1800 | 1800 |
0.2 MPa siab Softening kub nyob rau hauv load(X:) | 1600 | 1600 | > 1700 |
Ua haujlwm kub siab tshaj plaws(°C) | 1550 | 1550 | 1550 |
Cov khoom siv dav siv hauv ceramic sib tsoo log, cov khoom siv aluminium siab, aluminium porcelain pob, muaj kiln, hluav taws xob ceramic, high voltage hluav taws xob porcelain, huv ware, niaj hnub porcelain, nitride alloy thiab ua npuas ncauj ceramics thiab lwm yam lag luam.
Kev hnav tsis kam ntawm Si3N4-SiC cov khoom yog 3.13 npaug ntawm cov hlau hnav-tiv taus (Crl5Mo3), thiab qhov hnyav tsuas yog 1/3 ntawm cov hlau hnav-tiv taus (Crl5Mo3).
Kev tiv thaiv corrosion zoo txo qhov tseem ceeb ntawm Si3N4-SiC thiab calcium carbide thiab alumina hauv ntau cov kev daws teeb meem yog raws li hauv qab no:
Test daws | Kub ("C) | Si3N4-SiC | Hom ceramics | Aluminium carbide | Aluminium oxide |
98%Sulfuric acid | 100 | 1.8 | 55.0 ua | > 1000 | 65,0 ib |
50%Sodium hydroxide | 100 | 2,5 ib | > 1000 | 5.0 | 75.0 ua |
53%Hydrofluoric acid | 25 | <0.2 | 7.9 ib | 8.0 ib | 20,0 ib |
85%Phosphoric acid | 100 | <0.2 | 8.8 ib | 55.0 ua | > 1000 |
70%Nitric acid | 100 | <0.2 | 0.5 | > 1000 | 7,0 ua |
45%Potassium hydroxide | 100 | <0.2 | > 1000 | 3.0 | 60, 0 |
25%Hydrochloric acid | 70 | <0.2 | 0.9 | 85.0 ua | 72,0 ib |
10% Hydrofluoric acid + 57% Nitric acid
| 25 | <0.2 | > 1000 | > 1000 | 16,0 ib |