Preparation method of silicon nitride fiber material
A technology of silicon nitride fiber and nitriding reaction, which is applied in the field of ceramic fiber materials, can solve the problems of expensive silicon nitride fiber, complex preparation process, and expensive precursor, and achieve low production cost, simple process, and common equipment. Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0028] Put 0.7 units of silica fume, 0.3 units of carbon black, 0.02 units of sodium tripolyphosphate as dispersants, 1 unit of water, 0.2 units of acrylamide as monomers, and 0.02 units of methylenebisacrylamide as cross-linking agents into the ball mill tank Then, 0.1 unit of dodecyl ammonium bromide was added as a foaming agent, and 0.005 unit of polyvinyl alcohol was used as a foam stabilizer, and the volume was increased by 3 times by stirring and foaming. Add 0.05 unit of initiator ammonium persulfate and 0.01 unit of catalyst N,N,N',N'-tetramethylethylenediamine, and quickly pour it into the mold, and let it stand for a period of time and then solidify and form; wet green body After demoulding, it was left to dry naturally for 3 days, and then placed in an oven to heat up to 110 °C for 6 hours to remove the free water in the green body to obtain a dry green body; Nitrogen was introduced and heated to 1200°C at a rate of 2°C / min and held for 2 hours, then heated to 1350°...
Embodiment 2
[0030] Put 0.4 unit of silica fume, 0.6 unit of flour, 0.02 unit of sodium hexametaphosphate as dispersant, 0.6 unit of water, 0.2 unit of acrylamide as monomer, and 0.02 unit of methylenebisacrylamide as cross-linking agent into the ball mill tank , ball milled for 60min to obtain a stable slurry; then add 0.1 unit of dodecyl ammonium bromide as a foaming agent, 0.005 unit of starch as a foam stabilizer, stir and foam to increase its volume by 2 times; then add 0.05 unit of The initiator ammonium persulfate and 0.01 unit of catalyst N,N,N',N'-tetramethylethylenediamine were poured into the mold quickly, and cured and formed after standing for a period of time; after the wet body was demolded Leave it to dry naturally for 3 days, and then put it in an oven to heat up to 110 °C for 6 hours to remove the free water in the green body to obtain a dry green body; The temperature was raised to 1200°C at a rate of 2°C / min and held for 2 hours, and then heated to 1450°C at a rate of 1...
Embodiment 3
[0032] Put 0.7 unit of white carbon black, 0.3 unit of activated carbon powder, 0.02 unit of polyethylene glycol as a dispersant, 0.7 unit of water, 0.1 unit of acrylamide as a monomer, and 0.01 unit of methylenebisacrylamide as a cross-linking agent. In the tank, ball mill for 60min to obtain a stable slurry; then add 0.01 unit of dodecyl ammonium bromide as a foaming agent and 0.001 unit of polyvinyl alcohol as a foam stabilizer, stir and foam to increase its volume by 1 times; Then add 0.05 unit of initiator ammonium persulfate and 0.01 unit of catalyst N,N,N',N'-tetramethylethylenediamine, and quickly pour it into the mold, let it stand for a period of time and then solidify and form; wet blank After the body was demolded, it was left to dry for 3 days, and then it was heated to 110 °C in an oven for 6 hours to remove the free water in the body to obtain a dry body; Nitrogen was introduced and heated to 1200°C at a rate of 2°C / min and kept for 2 hours, then heated to 1350°...
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More