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quartz filter at Filtronetics, Inc. (802 words) |
 | The later is sometimes referred to as a notch quartz filter or band reject quartz filter. |
| The quartz filter is used when a narrow passband or stopband filter is required. |
| A quartz filters bandwidth ranges from 0.005% to 2% of the center frequency. |
| Quartz Properties (3427 words) |
| In general, the devitrification rate of fused quartz is slow for two reasons: the nucleation of the cristobalite phase is possible only at the free surface, and the growth rate of the crystalline phase is low. |
| In one study using GE 214LD fused quartz tubing, it was found that the sag rate decreases as the wall thickness of the tube is increased. |
| Specific indicators are the UV cutoff and the presence or absence of bands at 245 nm and 2.73 um. |
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