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Composite Ceramic Fiber Precursor Material

MAIN PRODUCTS:SILICON CARBIDE FIBER,POLYCARBOSILANE,ALUMINIUM-CONTAINING POLYCARBON SILANE,BERYLLIUM- CONTAINING POLYCARBON SILANE,SHORT-CUT SILICON CARBIDE FIBER,SILICON NITRIDE FIBER, ALUMINA FIBER.

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Product introduction

Polycarbosilane (PCS) is a silicone polymer with Si-C bonds as the main chain and active Si-H bonds. It is usually a glassy solid or viscous amber. The molecular weight and distribution of its PCS products can be adjusted from 1000 to 2200. The softening temperature can be designed in a wide range: 180℃～230℃. Polycarbosilane can be used to prepare silicon carbide silicon nitride continuous fibers, bulk near-size silicon carbide ceramic matrix, etc.

Product Specifications

Project	Check test results
Appearance	Colorless or light yellow lumpsand powder
Softening Point	180~210
Melting range	<30
Oxygen content ofcracked products	<1.5%
Number averagemolecular weight	1000-2200
Dispersion(Mw/Mn)	<3.5
Ceramic yield	>57%

Polycarbosilane Application areas

Silicon carbide fiber

The maximum service temperature of silicon carbide fiber reaches 1200°C. Its heat resistance and oxidation resistance are better than carbon fiber. Its strength retention rate is more than 80% at the maximum service temperature, and its chemical stability is also good. In terms of morphology, they are divided into two types: whiskers and continuous fibers. The new domestic continuous SiC fiber product has an average fiber diameter of 12 μm, a room temperature elastic modulus of 280 GPa, and an average tensile strength of 3.3 GPa.

Product Specifications

Serial number	Type of indicator	Technical parameters
1	Bunch sizing rate,%	3301：1.0～2.5
1	Bunch sizing rate,%	3303：0.8～2.0
2	Diameter,μm	12.0±1.0
3	Specification(filaments per bundle)	500
4	Discrete coefficient ofmonofilament diameter,%	＜20
5	Line density,Tex	180±10
6	Density, g/cm3	3.10±0.15
7	Tensile strength ofmonofilament, GPa.	≥2.8
8	Tensile strength of bundle, GPa	≥2.6
9	Discrete coefficient of bundle strength,%	＜10
10	Tensile modulus of elasticity, GPa	≥350
11	Discrete coefficient of tensile modulus ,%	＜10
12	Elongation at break,%	≥0.8
13	Discrete coefficient of elongation at break,%	＜10
14	SiC grain size, nm	＞8
15	Oxygen content, wt%	＜1.0
16	Carbon content, wt%:	30.9±2.0
17	Silicon content, wt%	68.9±2.0
18	Carbon to silicon atomic ratio	1.05±0.10
19	Hightemperature strength retention ratio	1250°C argon, 1h. >90% or retention strength≥2.5GPa
19	Hightemperature strength retention ratio	1250°C air, 1h. >80% or retention strength≥2.5GPa

Silicon carbide fiber Application areas

Silicon nitride (Si3N4) fiber

Silicon nitride fiber is a high-temperature resistant, high-strength ceramic fiber with the chemical formula Si3N4. In an oxidizing atmosphere, its maximum operating temperature is 1300°C; in a non-oxidizing atmosphere, its maximum operating temperature is 1800°C. The tensile strength and elastic modulus can reach 1000MPa and 300GPa respectively. The thermal expansion coefficient is low and the wear resistance is excellent. It is mainly used to strengthen metals and ceramics.

Product Specifications

Serial number	Type of indicator	Technical parameters
1	Bunch sizing rate,%	4101：1.5~3.5%
1	Bunch sizing rate,%	4103：0.9~2.9%
2	Diameter,μm	13.0±1.0
3	Discrete coefficient ofmonofilament diameter,%	＜20
4	Line density,Tex	155±8
5	Density, g/cm3	2.25±0.10
6	Monofilament tensile strength	≥1.60GPa
7	Bundle tensile strength	≥1.60GPa
8	Tensile elastic modulus	≥140GPa
9	Oxygen content, wt%	≤3.0%
10	Carbon content, wt%:	≤0.9%, nitrogen content: (37.0±3.0)%;
11	High temperature strength retention rate	1250℃ argon, 1h: >1.30GPa,
11	High temperature strength retention rate	1200℃ air, 1h: >1.20GPa.

Silicon nitride fiber Application areas

Alumina fiber

The long-term service temperature of alumina continuous fibers can reach about 1200-1300C. The single fiber diameter is about 7-14 microns and does not contain any organic components. It is completely harmless to human health. Its products mainly include: woven fabrics, woven belts, braided ropes, braided sleeves, sewing threads and other textiles, which are used in fireproof and thermal insulation soft potential, ceramic-based and metal-based composite materials. Alumina continuous fiber has high temperature, high strength and oxidation resistance, and is the core material for the production of a new generation of high-end equipment.

Product Specifications

Project	Classification temperature	Melting point	Color	Test weight	Material	Al2O3	Al2O3+SiO2
fiber cotton	1700	1840	White	80	Alumina fiber	95	99.5

Alumina fiber Application areas

If quality problems occur, we will provide a full refund and bear all shipping costs. Send an inquiry now to get a 20% discount, please contact us via WhatsApp or Email us to discuss.

Key words:

Composite Ceramic Fiber Precursor Material