Dental Ceramic Sintered Nails Metal Needles Steel Head with Sintered Tray

• Customization: Available
• Type: Dental Part
• Advantage: Longer Life
• Model NO.: st031302
• Feature: High Hardness
• Color: as Picture
• Product Name: Dental Steel Needles
• Material: Steel
• Transport Package: Wooden Box
• Specification: Customer′s Drawing
• Trademark: SHANGTAO
• Origin: China
• Production Capacity: 1000000pieces/Year

Product Description

Comparison Table of Ceramic Characteristics
		99 Alumina	95 Alumina	Steatite	Mullite	Cordierite	ZrO2
Main Components		99% A1203	95% A1203	MgO Si02	A1203 Si03	3Al2O3 2SiO2	ZrO2
Density	g/cm3	3.9	3.6	2.8	3	2.5	6
Water Absorption Rate	%	0	0	0	3	3	0
Sintering Temperature	ºC	1700	1680	1350	1300	1350	1600
Hardness	HV	1700	1500	800	1000	800	1300
Flexural Strength	Kgf/cm2	3500	300	900	1100	900	11000
Compressive Strength	Kgf/cm2	30000	25000	400	6000	3500	25000
Fracture Toughness	MPa.m1/2	4	3-4	-	-	-	-
Maximum Operating Temperature	ºC	1500	1450	1100	1000	1000	-
Thermal Expansion Coefficient 0-1000ºC	/ºC	8*10-6	8*10-6	6*10-6	6*10-6	4*10-6	9.5*10-6
Thermal Shock Resistance	T(ºC)	220	220	200	300	250	360
Thermal Conductivity	W/(m·K)	31.5	25	2.5	4.2	1.3	3
		15.9	14	-	-	-	-
Volume Resistivity	Ω/cm2	-	-	-	-	-	-
20ºC		>1012	>1012	>1012	>1012	>1012	>1012
100ºC		1012-1013	1012-1013	1010-1011	1010-1012	107-108	-
300ºC		>1012	>1010	5*108	-	3*105	5*109
Insulation Failure Strength	KV/mm	18	18	10	10	10	-
Induced Constant	(E)	10	9.5	5.8	6	6	-
(100Mhz)
Induced Tangent	(tg6)	0.4*10-3	0.4*10-3	0.4*10-3	0.4*10-3	0.4*10-3	-