Ceramic Dosing Pumps

Product Description

Product Description

Ceramic dosing pumps are specially developed for the dosing of highly abrasive materials. These pumps are a precision pair consisting of a solid ceramic body and a piston. The high hardness of the ceramic and the absence of elastomer or liquid seals enable ceramic dosing pumps to operate for many years without leakage or pressure loss due to material leakage from the gaps between the piston and the cylinder. The pump can be manufactured from silicon matrix silicon carbide material according to the drawings. 

Purpose: Ceramic dosing pumps
Scope of application:  Production of polymeric materials
Operations performed: Pumping of liquid media
Body material: Silicon carbide

Featurers

Pressureless sintered silicon carbide is a type of silicon carbide ceramic material prepared by the pressureless sintering process, with the following significant advantages:
 
- Excellent mechanical properties: It has high hardness and strength, good flexural strength and fracture toughness, can withstand large mechanical stress, and is suitable for scenarios requiring wear resistance and high strength.
- Good high-temperature resistance: It can maintain stable performance in high-temperature environments, has strong oxidation resistance, can work for a long time at temperatures above 1600°C, and is suitable for high-temperature structural components.
- Outstanding corrosion resistance: It has strong resistance to corrosive media such as acids and alkalis, and performs stably in corrosive environments such as chemical industry and metallurgy.
- Lower cost: Compared with processes such as reaction sintering and hot-press sintering, pressureless sintering does not require complex pressure equipment, has higher production efficiency, and helps reduce the manufacturing cost of materials.
- Good dimensional accuracy and shape flexibility: It is easy to prepare components with complex shapes and precise dimensions, and can meet the diverse needs for component shapes in different scenarios.

Detailed Photos

Product Parameters

Different SiC products Parameter Comparison
	Unit	Data
		RBSiC  (SiSiC)	NBSiC	SSiC	RSiC
SiC content	%	85	80	99	98.5
Free Silicon content	%	15	0	0	0
Max Temperature	ºC	1380	1550	1600	1650
Density	g/cm³	3.02	2.72	3.1	2.60-2.74
Porosity	%	0	12	0	15
Bending strength 20ºC	Mpa	250	160	380	100
Bending strength 1200ºC	Mpa	280	180	400	120
Modulus of elasticity 20ºC	Gpa	330	220	420	240
Modulus of elasticity 1200ºC	Gpa	300	/	/	200
Thermal conductivity at 1200ºC	W/m.k	45	15	74	10
Coefficient of thermal expansion	K^-1x10^-6	4.5	5	4.1	4.8
HV	kg/m^m2	2500	2500	2800	/
Corrosion test data for liquids of different materials
Test environment	Corrosive weight loss (mg/cm²yr )
conc.Reagent	Temperature	SSiC	RBSiC (SiSiC)	Tungsten carbide
wt%	°C	No Free Si	SiC    (12% Si)	6% Co	Aluminum Oxide
					99%
98% H2SO4	100	1.8	55	>1000	65
50% NaOH	100	2.5	>1000	5	75
53% HF	25	<0.2	7.9	8	20
85% H3PO4	100	<0.2	8.8	55	>1000
70% HNO3	100	<0.2	0.5	>1000	7
45% KOH	100	<0.2	>1000	3	2.72
25% HCl	70	<0.2	0.9	850	16
10% HF & HNO3	25	<0.2	>1000	>1000
Explain
Test Time:
125 to 300 hours of submersive testing, continuously stirred.
Corrosion Weight Loss Guide:
>1000 mg/cm² yr	Completely destroyed within days.
100 to 999 mg/cm² yr	Not recommended for service greater than a month
50 to 100 mg/cm² yr	Not recommended for service greater than one year
10 to 49 mg/cm² yr	Caution recommended, based on the specific application.
03 to 9.9 mg/cm² yr	Recommended for long term service
<2 mg/cm² yr	Recommended for long term service, no corrosion, other than as a result of surface cleaning, was evidenced.

Application

Due to its excellent mechanical properties, high-temperature resistance, corrosion resistance and other characteristics, pressureless sintered silicon carbide has a wide range of applications, mainly including the following categories:
 
- High-temperature industrial field: It can be used to manufacture high-temperature furnace tubes, thermocouple protection sleeves, high-temperature structural parts, etc. It can work stably in high-temperature environments and meet the high-temperature process requirements of metallurgy, ceramics and other industries.
- Mechanical wear-resistant field: It is suitable for making wear-resistant pipes, valves, bearings, seals, etc. In material transportation and wear equipment in mining, electric power, chemical industry and other industries, it can effectively improve the service life of components.
- Chemical anti-corrosion field: Due to its strong corrosion resistance, it can be used for linings of chemical reaction kettles, corrosion-resistant pump bodies, pipes, etc., to resist the erosion of corrosive media such as acids and alkalis.
- Energy field: It can be used as heat absorber components in solar thermal power generation, as certain high-temperature resistant and radiation-resistant structural parts in the nuclear energy field, and also for preparing key components of fuel cells.
- Semiconductor field: It can be used as high-temperature carriers, wafer trays, etc. in the semiconductor manufacturing process to meet the requirements of high-temperature processes and clean environments.

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