High Purity Alumina Ceramic Tube Used in Industry

High Purity Alumina Ceramic Tube Used in Industry

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Loading Port:: Guangzhou

Payment Terms:: TT OR LC

Min Order Qty:: 100 pc

Supply Capability:: 100000 pc/month

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Product Description

Alumina ceramic is the most mature of the engineering ceramics, offering excellent electrical insulation properties together with high hardness and good wear resistance but relatively low strength and fracture toughness. Alumina has a high melting point, high hardness, although mechanical strength is reduced at temperatures above 1000 C. Due to the relatively large coefficient of thermal expansion, thermal shock resistance is reduced.

Alumina is also an electrically insulating material, with a high electrical resistivity, increasing with purity. Good chemical stability of alumina leads to high corrosion resistance as well. It is insoluble in water and only slightly soluble in strong acid and alkaline solutions. Testing has shown that the low chemical solubility of alumina ceramics components makes them highly resistant to chemical corrosion. This is what makes high purity alumina the material of choice for components in a wide range of industrial applications.

Ceramic tubes are used when electrical insulation is necessary in high heat applications. This makes them useful for supporting electric heating elements in ovens, heaters and furnaces. Ceramics hold their shape and size under pressure. This is important in switching applications where the ceramic is used to open and close electrical contacts in a thermostat or pressure switch. Ceramic parts are very abrasion resistant and offer long life in applications where other materials would wear out quickly.

Main Physical Properties:

1. Good electrical insulation
2. High mechanical strength
3. Excellent wear resistance
4. Excellent corrosion resistance
5. Low dielectric constant

Main Applications:

1. Pump seals and other components
2. Wear resistant inserts
3. Insulating washers or bushings
4. Semiconductor components
5. Aerospace components
6. Automotive sensors
7. Electrical or electronic insulators

Data Sheet

Characteristics	Unit	95 Al2O3	99 Al2O3	ZrO2	GPSi3N4	BN	Glass Ceramic
Crystal Structure	-	hexagonal	hexagonal	tetragonal	hexagonal	hexagonal	-
Color	-	white	ivory	white	gray	white	white
Density	g/cm³	3.65	3.88	5.95	3.22	2.26	2.55
Water Absorption	%	0	0	0	0	0.0-1.0	0
Young's Modulus	Gpa	280	350	205	295	670	65
Vickers Hardness	Gpa	14	20	12	18-20	-	-
Flexural Strength	Mpa	280	300	900	650	51	100
Compressive Strength	Mpa	2000	2500	2200	2200	230	500
Thermal Conductivity	W/(m•K)	18-25	30	2.2	25	20	1.70
Thermal shock resistance	ΔT(C°)	220	180-200	280-350	450-650	>1500	25-100
Max. Working Temperature	C°	1500	1700	850	1200	960	800
Volume Resistivity	Ω . cm	>10^15	>10^14	>10^12	>10^14	10^13	10^16
Dielectric Constant	-	9.50	9.80	26	8.20	4.08	6.02
Dielectric Strength	kV/mm	16	22	-	16	375	40

FAQ

We have organized several common questions for our clients, may help you sincerely：

--------What is the application of Ceramic Tubes?

1. Pump seals and other components
2. Wear resistant inserts
3. Insulating washers or bushings
4. Semiconductor components
5. Aerospace components
6. Automotive sensors

----------What advantages of Ceramic Tubes?

1. Good electrical insulation
2. High mechanical strength
3. Excellent wear resistance
4. Excellent corrosion resistance
5. Low dielectric constant

Q: I heard wrapping headers plainly in that heat tape/wrap will rust out headers.If you ceramic coat the headers and then wrap them,will the heat be lowered even more than just the ceramic coating alone or is it now defeating the purpose?--yes i know ceramic coating is for heat dissapation also but will you get twice the heat reduction if you use both the coating and the wrap?: Coating headers on the exterior will reduce heat, but is mostly for rust reduction - and when headers rust on the inside, they can lose efficiency and horsepower. Ceramic coating really belongs on the inside to maintain flow, not the outside, and is a race modification that's not really understood. In this case, the value of headers can be completely negated in less than 20,000 miles just from interior rust creating as much backpressure as a stock manifold. Header wrap is used by some in racing to minutely increase horsepower - on the street, it doesn't deliver enough to justify the expense. Dyno estimates run less than 10 hp on a highly tuned motor, street motors would show 1/3 the improvement. Wrapping them to reduce underhood heat and hot soaking other components can be simplified by just adding a heat shield to the starter, or adding reflective insulation to the firewall or floorboards - which will also reduce interior noise and give better results. Header wrap will increase rusting of all headers - but if they are ceramic coated on the outside, it won't show as much. All in all, header wrap is a very specific race item that is a negative for the street, as are most race car modifications.

Q: I would like to find a good school preferably on the east coast with a really good ceramics department. I don‘t like to drive so major city would be ideal, but I‘m willing to move anywhere if I have to.: Alfred University is supposed to be best. You can also check out the other schools on the ranking list. A ranking list like that may not mean that the top school is really the best school for you specifically, that depends on many other factors, but if you look into any of these school they all should have good facilities and a program which is active. Ideally you would pick a few favorites and visit if that is an option. You would get a much better impression whether it's a place you feel comfortable in and whether the town or city it's in is something you could live in too.

Q: I have some thin rope border tiles that look really dull, but I notice when I wet them to scrub the left over grout out of the lines, they look really shiny and pretty. It made me wonder if I could coat them with some polyurethane to make them pop?: It's best not to put anything on ceramic tiles as they are non-absorbant. If you really want to try, buy a small container of stone Sealer Enhancer and brush it on a small area in an inconspicuous spot to see how it looks then how it holds up. By coating ceramic you're probably asking for maintenence problems in the future.

Q: is epoxy a ceramic?: NO. Epoxies are organic in nature while ceramics are inorganic. Ceramics are made from intensely heating up mixture of clay-like materials and earth stuff unless they become rock solids. Epoxies when dried becomes hard also but it is because of the chemical reaction of organic compounds.

Q: since we are running out fast of natural resources such as iron could ceramics be used as a potential replacement since we have an almost unlimited supply and with advancing materials technology we could potentially use them for everything from cars to buildings or could we thats what and i wana know: That is a good answer, however, the shuttle tiles illustrate that great things can be done with ceramics, if we have sufficient motivation. Many of the newer super conductors are sort of ceramics, but brittle is a problem. A break though could mean up to half of the electrical copper is replaced by super conductors, as copper has been doubling in price every few years, and aluminum has several annoying problems. True, ceramics are metal compounds, but most of those metals are not competing with steel for structural, for several reasons. Running out fast is relative not in this century, but prices adjusted for inflation have doubled in recent years, perhaps mostly due to NIMBY not in my back yard, but large scale ceramic manufacturing may not be a desirable neighbor either. Over the next few centuries, ceramics may replace 90% of present steel, wood, plastic, and drywall calcium sulphate applications, if for no other reason than improved fire safety. Neil

Q: What are the advantages of the ceramic valve core of the faucet?: 1, long service life, the study shows that the ceramic valve core after more than 500 thousand times the switch operation, still can be smooth and labor-saving operation, can be durable use. The ceramic valve core has the advantages of aging resistance, wear resistance, no maintenance, guarantee the stability of operation, save maintenance costs and labor intensity and so on. At the same time, aging resistance and wear resistance also make the service life of the ceramic valve core far exceeds the service life of other valve cores.2, superior sealing, high tensile strength of ceramics, not easy to deformation, high temperature resistance, low temperature resistance, wear resistance, non corrosion characteristics, determines the good sealing performance of ceramic materials. The ceramic valve core makes the water tap not easy to leak, and the water drop also achieves the goal of environmental protection and water saving.

Q: How do you wash the ceramic knife in color?: In addition, it is best to clean the food immediately after being cut off, and clean the fruit after the fruit is cut. Otherwise, the blade will turn yellow after a long time.Hope to help you, I wish a happy life, hope to adopt.

Q: explain why glass ceramics are generally not transparent.?: A bee bottle could work. I have seen it been done on stage.

Q: Would you perceive htem as different kind of material or not? Would you put them into the same industry or not?: Porcelain is a type of ceramic. Ceramics are the general family for brittle, mostly oxide materials that need to be heat treated at high temperatures to firm the bonds. Porcelain is a ceramic made from a specific combination of the oxides of Silicon, Aluminum, and Magnesium. Yes, they are in the same industry. Specifically, porcelain is classed in the whitewares sub-industry of ceramics.

Q: Ok, I am planning to have a business that includes painting ceramics or bisque if you will. I just wanted to know if the general population would like that. It would directed more towards children however. ^-^: The general population loves hand painted ceramics especially customized for children and baby rooms. My mother up to the time she passed away, had a very successful ceramics b usiness in California. She owned the whole operation, I poured the moulds and fired the greenware to bisque while her and my dad ran the retail store. She also had a awesome knack for painting them far beyond imagination. She also taught painting classes to customers to help them with projects etc., The #1 thing for you to remeber, as Mom would say to us, if you are painting items for general public, you must anaylize the trend for your items and NEVER paint just ypuir color preferences. Not everyone likes what you do!!! So if you are painting children items, search like stores and see what is Hot and what was hot.

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